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| macro analysis in chemistry: Quantitative Chemical Analysis Na Li, John J Hefferren, Ke'an Li, 2013-04-26 This book covers both fundamental and practical aspects of chemical analysis: Data Process and Analysis; Chemical Equilibria and Volumetric titrations; Gravimetry; Spectrophotometry; Sample Preparation and Separation Methods in Quantitative Analysis. It was written with the rich tradition of teaching at Peking University College of Chemistry, and edited by an American professor who was personally sensitive to the needs of students learning science from traditional chemistry textbooks written in English. Many examples and illustrative problems in this text have been taken from previous textbooks by the Peking University Team Teaching Program. The book can be used as a starter in analytical chemistry which is fundamental and the base upon which chemistry is built. Traditional chapters of initial learning in analytical chemistry are included, such as volumetric, gravimetric and separation methods; the book also includes key chapters on problem solving relating to recent progress in analytical chemistry. |
| macro analysis in chemistry: Basic Concepts Of Analytical Chemistry S M Khopkar, 1998 Analytical Chemistry Has Made Significant Progress In The Last Two Decades. Several Methods Have Come To The Forefront While Some Classical Methods Have Been Relegated. An Attempt Has Been Made In This Edition To Strike A Balance Between These Two Extremes, By Retaining Most Significant Methods And Incorporating Some Novel Techniques. Thus An Endeavour Has Been Made To Make This Book Up To Date With Recent Methods.The First Part Of This Book Covers The Classical Volumetric As Well As Gravimetric Methods Of Analysis. The Separation Methods Are Prerequisite For Dependable Quantitative Methods Of Analysis. Therefore Not Only Solvent Extraction Separations But Also Chromatographic Methods Such As Adsorption, Partition, Ion- Exchange, Exclusion Andelectro Chromatography Have Been Included. To Keep Pace With Modern Developments The Newly Discovered Techniques Such As Ion Chromatography, Super-Critical Fluid Chromatography And Capillary Electrophoresis Have Been Included.The Next Part Of The Book Encompases The Well Known Spectroscopic Methods Such As Uv, Visible, Ir, Nmr, And Esr Techniques And Also Atomic Absorption And Plasma Spectroscopy And Molecular Luminescences Methods. Novel Analytical Techniques Such As Auger, Esca And Photo Accoustic Spectroscopy Of Surfaces Are Also Included.The Final Part Of This Book Covers Thermal And Radioanalytical Methods Of Analysis. The Concluding Chapters On Electroanalytical Techniques Include Potientometry, Conductometry. Coulometry And Voltametry Inclusive Of All Kinds Of A Polarography. The Theme Of On Line Analysis Is Covered In Automated Methods Of Analysis.To Sustain The Interest Of The Reader Each Chapter Is Provided With Latest References To The Monographs In The Field. Further, To Test The Comprehension Of The Subject Each Chapter Is Provided With Large Number Of Solved And Unsolved Problems.This Book Should Be Useful To Those Reads Who Have Requisite Knowledge In Chemistry And Are Majoring In Analytical Chemistry. It Is Also Useful To Practising Chemists Whose Sole Aim Is To Keep Abreast With Modern Developments In The Field. |
| macro analysis in chemistry: Multiple Representations in Chemical Education John K. Gilbert, David Treagust, 2009-02-28 Chemistry seeks to provide qualitative and quantitative explanations for the observed behaviour of elements and their compounds. Doing so involves making use of three types of representation: the macro (the empirical properties of substances); the sub-micro (the natures of the entities giving rise to those properties); and the symbolic (the number of entities involved in any changes that take place). Although understanding this triplet relationship is a key aspect of chemical education, there is considerable evidence that students find great difficulty in achieving mastery of the ideas involved. In bringing together the work of leading chemistry educators who are researching the triplet relationship at the secondary and university levels, the book discusses the learning involved, the problems that students encounter, and successful approaches to teaching. Based on the reported research, the editors argue for a coherent model for understanding the triplet relationship in chemical education. |
| macro analysis in chemistry: Macrocyclic Chemistry K. Gloe, 2005-12-05 Macrocyclic Chemistry: Current Trends and Future Perspectives illustrates essential concepts in this expanding research field covering both basic and applied studies. Written by well-known experts from around the world, the topics of the chapters range from new macrocyclic architectures with different functions and self-assembly processes through to the modeling and dynamics of such systems. The content also reflects on application possibilities in analytical chemistry, separation processes, material preparation and medicine. Thus this book serves as a creative source of research strategies and methodic tools. Providing an excellent overview of the field, this book will be a valuable resource for researchers in industry and academic institutions as well as for teachers of science and graduate students. This book is devoted to the long-standing tradition of the International Symposia on Macrocyclic Chemistry (ISMC) and published to coincide with the 30th meeting, Dresden, Germany. |
| macro analysis in chemistry: College Practical Chemistry V K Ahluwalia, Sunita Dhingra, Sunita Dhingra, 2005 |
| macro analysis in chemistry: Principles of Analytical Chemistry Miguel Valcarcel, 2012-12-06 Principles of Analytical Chemistry aims to ease the first contact of students pursuing different scientific and technical studies by providing them with a simple, general overview of the discipline. The objective of this innovative textbook is to teach rather than to inform. Using keywords of modern Analytical Chemistry, it constructs a teaching message accessible to the beginner, with emphasis on relations between these keywords to ensure consistency in the teaching contents of the book. Practical exercises, 450 questions for students, and 27 interactive seminars are used as vehicles for expounding a large number of examples in order to clarify and consolidate the text and facilitate its comprehension. |
| macro analysis in chemistry: Micro and Macro Mixing Henning Bockhorn, Dieter Mewes, Wolfgang Peukert, Hans-Joachim Warnecke, 2012-03-01 The homogenization of single phase gases or liquids with chemical reactive components by mixing belongs to one of the oldest basic operations applied in chemical engineering. The mixing process is used as an essential step in nearly all processes of the chemical industry as well as the pharmaceutical and food ind- tries. Recent experimentally and theoretically based results from research work lead to a fairly good prediction of the velocity fields in differend kinds of mixers, where as predictions of simultaneously proceeding homogeneous chemical re- tions, are still not reliable in a similar way. Therefore the design of equipment for mixing processes is still derived from measurements of the so called “mixing time” which is related to the applied methods of measurement and the special - sign of the test equipment itself. The cooperation of 17 research groups was stimulated by improved modern methods for experimental research and visualization, for simulations and nume- cal calculations of mixing and chemical reactions in micro and macro scale of time and local coordinates. The research work was financed for a six years period within the recently finished Priority Program of the German Research Foundation (DFG) named “Analysis, modeling and numerical prediction of flow-mixig with and without chemical reactions (SPP 1141)”. The objective of the investigations was to improve the prediction of efficiencies and selectivities of chemical re- tions on macroscopic scale. |
| macro analysis in chemistry: Basic Analytical Chemistry Mr. Rohit Manglik, 2024-05-18 EduGorilla Publication is a trusted name in the education sector, committed to empowering learners with high-quality study materials and resources. Specializing in competitive exams and academic support, EduGorilla provides comprehensive and well-structured content tailored to meet the needs of students across various streams and levels. |
| macro analysis in chemistry: Vogels Textbook Of Quantitative Chemical Analysis Mendham, 2006-02 |
| macro analysis in chemistry: Instrument and Chemical Analysis Aspects of Electron Microanalysis and Macroanalysis Herbert A. Elion, 1966 |
| macro analysis in chemistry: ANALYTICAL CHEMISTRY, Second Edition Dash, Dhruba Charan, 2017-08-01 The book, now in its second edition, provides a clear and concise understanding of the principles, applications and limitations of the various techniques involved in analytical chemistry. It motivates and prepares the students to face academic and research challenges in the field of analytical chemistry in performing analytical analysis and interpreting the results obtained. The second edition, while retaining the flow of chapters—qualitative analysis, quantitative analysis, data analysis, analysis of organic compounds, separation and purification techniques, electroanalytical techniques and spectroanalytical techniques, introduces a new chapter on Thermoanalytical Techniques that discusses thermogravimetric analysis, derivative thermogravimetric analysis and differential thermal analysis in detail. Intended primarily as a text for the undergraduate and postgraduate students (B.Sc. and M.Sc.) of chemistry, the book would also be of great benefit to the students who are appearing for NET and GATE examinations. KEY FEATURES • Provides clear introduction to all key analytical methods. • Uses a large number of illustrations to make each topic self-explanatory. • Includes a large number of worked-out problems for easy understanding of the concepts. • Contains numerous objective type questions, short answer type questions and graded problems to test the readers’ understanding of the theory. |
| macro analysis in chemistry: Chemical Analysis Francis Rouessac, Annick Rouessac, 2013-05-06 Completely revised and updated, Chemical Analysis: Second Edition is an essential introduction to a wide range of analytical techniques and instruments. Assuming little in the way of prior knowledge, this text carefully guides the reader through the more widely used and important techniques, whilst avoiding excessive technical detail. Provides a thorough introduction to a wide range of the most important and widely used instrumental techniques Maintains a careful balance between depth and breadth of coverage Includes examples, problems and their solutions Includes coverage of latest developments including supercritical fluid chromatography and capillary electrophoresis |
| macro analysis in chemistry: Analytical Methods in Chemistry Mr. Rohit Manglik, 2024-03-03 EduGorilla Publication is a trusted name in the education sector, committed to empowering learners with high-quality study materials and resources. Specializing in competitive exams and academic support, EduGorilla provides comprehensive and well-structured content tailored to meet the needs of students across various streams and levels. |
| macro analysis in chemistry: Practical Chemistry (For B.Sc. I, II and III Year Students) Pandey O.P. & Bajpai D.N. & Giri S., 1972 FOR B.Sc . I , II & III YEAR STUDENTS |
| macro analysis in chemistry: Basic Analytical Chemistry L. Pataki, E. Zapp, 2013-10-22 Pergamon Series in Analytical Chemistry, Volume 2: Basic Analytical Chemistry brings together numerous studies of the vast expansion in the use of classical and instrumental methods of analysis. This book is composed of six chapters. After providing a theoretical background of analytical chemistry, this book goes on dealing with the fundamental principles of chemical equilibria in solution. The subsequent chapters consider the advances in qualitative and quantitative chemical analyses. These chapters present a unified view of these analyses based on the Bronsted-Lowry theory and the donor-acceptor principle. These topics are followed by discussions on instrumental analysis using various methods, including electrochemical, optical, spectroscopic, and thermal methods, as well as radioactive isotopes. The finals chapters examine the separation methods and the essential features of organic chemical analysis that are different from methods for inorganic compounds. This book is of value to analytical chemists and researchers. |
| macro analysis in chemistry: Principles of Analytical Chemistry Mr. Rohit Manglik, 2024-04-06 EduGorilla Publication is a trusted name in the education sector, committed to empowering learners with high-quality study materials and resources. Specializing in competitive exams and academic support, EduGorilla provides comprehensive and well-structured content tailored to meet the needs of students across various streams and levels. |
| macro analysis in chemistry: Chemistry for Degree Students B.Sc. Semester - IV (As per CBCS) Madan R.L., 2017 This textbook has been designed to meet the needs of B.Sc. Fourth Semester students of Chemistry as per the UGC Choice Based Credit System (CBCS). With its traditional approach to the subject, this textbook lucidly explains principles of chemistry. Important topics such as transition elements, coordination chemistry, crystal field theory, kinetic theory of gases, liquids, solids and chemical kinetics are aptly discussed to give an overview of inorganic and physical chemistry. Laboratory work has also been included to help students achieve solid conceptual understanding and learn experimental procedures. |
| macro analysis in chemistry: Statistics for Analytical Chemistry Jane C. Miller, James N. Miller, 1992 |
| macro analysis in chemistry: Chemical Abstracts , 1924 |
| macro analysis in chemistry: Practical Medicinal Chemistry with Macrocycles Eric Marsault, Mark L. Peterson, 2017-09-12 Including case studies of macrocyclic marketed drugs and macrocycles in drug development, this book helps medicinal chemists deal with the synthetic and conceptual challenges of macrocycles in drug discovery efforts. Provides needed background to build a program in macrocycle drug discovery –design criteria, macrocycle profiles, applications, and limitations Features chapters contributed from leading international figures involved in macrocyclic drug discovery efforts Covers design criteria, typical profile of current macrocycles, applications, and limitations |
| macro analysis in chemistry: Journal of the Chemical Society , 1924 |
| macro analysis in chemistry: History of Analytical Chemistry Ferenc Szabadváry, 2016-01-22 History of Analytical Chemistry is a systematic account of the historical development of analytical chemistry spanning about 4,000 years. Many scientists who have helped to develop the methods of analytical chemistry are mentioned. Various methods of analysis are discussed, including electrogravimetry, optical methods, electrometric analysis, radiochemical analysis, and chromatography. This volume is comprised of 14 chapters and begins with an overview of analytical chemistry in ancient Greece, the origin of chemistry, and the earliest knowledge of analysis. The next chapter focuses on analytical chemistry during the Middle Ages, with emphasis on alchemy. Analytical knowledge during the period of iatrochemistry and the development of analytical chemistry during the phlogiston period are then examined. Subsequent chapters deal with the development of the fundamental laws of chemistry, including the principle of the indestructibility of matter; analytical chemistry during the period of Berzelius; and developments in qualitative and gravimetric analysis. Elementary organic analysis is also considered, along with the development of the theory of analytical chemistry. This book will be helpful to chemists as well as students and researchers in the field of analytical chemistry. |
| macro analysis in chemistry: University Chemistry, Vol. I C. Parameshwara Murthy, 2008 Cherla Parameswara Murthy Has Been Teaching At Osmania University, Hyderabad For 22 Years. He Is Associated With Many International Research Laboratories. He Worked At The University Of Karlsruhe, W. Germany (1980-81), At The Max-Planck Institute For Radiation Chemistry Mulheim, W. Germany, (1985-86), At The Ohio State University, Columbus, U.S.A. (1987-88) And At Hahn-Meitner Institute, Berlin, Germany During 1993. He Had Many Publications In The National And International Journals.Syed Fazal Mehdi Ali, After Receiving His M.Sc. From Marathwada University (1970), Was Engaged In Teaching The U.G & P.G. Courses At Anwarul Uloom College, Affiliated To Osmania University. After His Voluntary Retirement, He Is Now Serving As The Principal Of Rishi Degree College. He Had Published A Few Research Papers In The Field Of Complexes Of Oxygen And Phophorous Donor Ligands With Rare Earths.D. Ashok Obtained His Ph.D. From Osmania University In 1987. Since Then He Has Been Serving In The Same University And Nourishing His Research Interest In The Field Of Natural Products And Synthetic Organic Chemistry. He Has 20 Papers To His Credit. |
| macro analysis in chemistry: Journal of the Chemical Society Chemical Society (Great Britain), 1912 Titles of chemical papers in British and foreign journals included in Quarterly journal, v. 1-12. |
| macro analysis in chemistry: Quarterly Journal of the Chemical Society of London Chemical Society (Great Britain), 1924 |
| macro analysis in chemistry: Journal of Chemical Education , 1928 |
| macro analysis in chemistry: Advances Practical Inorganuic Chemistry , |
| macro analysis in chemistry: Hydrogeochemistry Fundamentals and Advances, Groundwater Composition and Chemistry Viatcheslav V. Tikhomirov, 2016-01-20 Water is the Earth's most precious resource. Until recent years, water was often overlooked as being overly abundant or available, but much has changed all over the world. As climate change, human encroachment on environmental areas, and deforestation become greater dangers, the study of groundwater has become more important than ever and is growing as one of the most important areas of science for the future of life on Earth. This three-volume set is the most comprehensive and up-to-date treatment of hydrogeochemistry that is available. The first volume lays the foundation of the composition, chemistry, and testing of groundwater, while volume two covers practical applications such as mass transfer and transport. Volume three, which completes the set, is an advanced study of the environmental analysis of groundwater and its implications for the future. This first volume in the set is an important milestone in hydrogeochemistry, covering the fundamentals of groundwater science. It also goes further into testing methods, applications of testing, and analysis. It is not only the introductory text for this groundbreaking and ambitious new three-volume project, but it is also a valuable reference for the scientist, engineer, or student. Whether as a textbook or a reference work, this volume is a must-have for any library on hydrogeochemistry. |
| macro analysis in chemistry: Semimicro and Macro Organic Chemistry Cheronis Nicholas D, 2016-05-06 This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. |
| macro analysis in chemistry: British Chemical Abstracts , 1926 |
| macro analysis in chemistry: Nuclear Science Abstracts , 1974 |
| macro analysis in chemistry: Chemistry: Inorganic Qualitative Analysis in the Laboratory Clyde Metz, 2012-12-02 Chemistry: Inorganic Qualitative Analysis in the Laboratory is a textbook dealing with qualitative analysis in the laboratory, as well as with the process of anion and cation analysis. The book presents an overview of the subject of inorganic qualitative analysis, including as the equipment, reagents, and procedures that are going to be used in the laboratory. Preliminary experiments include the classification of precipitates, handling precipitates, separation techniques, flame tests, Brown ring test, solvent extraction. The text also describes in detail how to prepare the experiment for anion and cation analysis such as testing for water solubility in a solid sample or the sodium carbonate treatment of a water-soluble sample. The book also explains the qualitative analysis for anions in preliminary and specific tests. In the qualitative analysis for cations, the student follows different procedures for Cation Groups I, II, III, IV or V. For example, the ions of Cation Group V cannot be precipitated by any Cation Groups I-IV reagents, nor by any single group reagent. The textbook is suitable for both chemistry teachers and freshmen students. |
| macro analysis in chemistry: Kirk-Othmer Chemical Technology and the Environment, 2 Volume Set Wiley, 2007-05-21 The two-volume reference work Chemical Technology and the Environment provides readers with knowledge on contemporary issues in environmental pollution, prevention and control, as well as regulatory, health and safety issues as related to chemical technology. It introduces and expands the knowledge on emerging green materials and processes and greener energy technology, as well as more general concepts and methodology including sustainable development and chemistry and green chemistry. Based on Wiley's renowned, Kirk-Othmer Encyclopedia of Chemical Technology, this compact reference features the same breadth and quality of coverage and clarity of presentation found in the original. |
| macro analysis in chemistry: Dictionary of chemistry and chemical engineering Louis De Vries, Helga Kolb, Joachim Thuss, 1970 |
| macro analysis in chemistry: Foundations of Analytical Chemistry Miguel Valcárcel Cases, Ángela I. López-Lorente, Ma Ángeles López-Jiménez, 2017-08-29 This book offers a completely new approach to learning and teaching the fundamentals of analytical chemistry. It summarizes 250 basic concepts of the field on the basis of slides. Each of the nine chapters offers the following features: • Introduction: Summary. General scheme. Teaching objectives. • Text containing the explanation of each slide. • Recommended and commented bibliography. • Questions to be answered. • Slides. A distinct feature of this novel book is its focus on the fundamental concepts and essential principles of analytical chemistry, which sets it apart from other books presenting descriptive overviews of methods and techniques. |
| macro analysis in chemistry: Mechanics DS Mathur, 2000-10 The book presents a comprehensive study of important topics in Mechanics of pure and applied sciences. It provides knowledge of scalar and vector in optimum depth to make the students understand the concepts of Mechanics in simple, coherent and lucid manner and grasp its principles & theory. It caters to the requirements of students of B.Sc. Pass and Honours courses. Students of engineering disciplines and the ones aspiring for competitive exams such as AIME and others, will also find it useful for their preparations. |
| macro analysis in chemistry: Technical Manual United States. War Department, 1943 |
| macro analysis in chemistry: U.S. Geological Survey Circular , 1992 |
| macro analysis in chemistry: 1991 Annual Report on Alaska's Mineral Resources , 1991 |
| macro analysis in chemistry: Separation and Identification of the Silt-sized Heavy-mineral Fraction in Sediments Judith A. Commeau, Lawrence J. Poppe, R. F. Commeau, Geological Survey (U.S.), 1992 See journals under US Geological survey. Circular 1071. |
计算机中的宏为什么起名叫宏？ - 知乎
Mar 30, 2013 · 看. Macro (computer science) macro一词不是微软发明的，而是计算机科学中长期存在的一个术语，最早出现在1959年的文章
Macro lens choice for APS-C - PentaxForums.com
Dec 15, 2024 · The Tamron macro lenses - even from the 1980's - have been simply stellar throughout all of their iterations, even on digital. If your macro interests include insects, …
S-M-C/Super Macro-Takumar 50mm F4 - Pentax Forums
Feb 21, 2025 · The SMC Macro-Takumar 50mm f/4 is a great lens optically and mechanically. As expected for a macro lens, it is very sharp across most of the frame at f/4, and even sharper at …
SMC Pentax-M 100mm F4 Macro - Pentax Forums
May 3, 2025 · - Vivitar Auto Macro 90/2.8 - goes 1:1 without adapters - Pentax M 100/2.8 (non macro) - comparable in contrast and resolution (using macro tubes) and even exceeds it from …
Macro Photography - PentaxForums.com
Aug 19, 2023 · Macro Photography Group Maintained by Rense This is the place to share your ideas and techniques on macro photography, to ask questions, and to start discussions on this …
Tamron SP AF Macro 1:2 (52EP) 90mm F2.5 - Pentax Forums
Nov 21, 2023 · Build quality is great, in most situations (except close focusing) front lens is located deep inside so you don’t need lens hood or filters. Full/limit AF option is very useful. …
Sigma APO DG Macro 70-300mm F4-5.6 - Pentax Forums
Jan 13, 2024 · Sigma’s 70-300mm F4-5.6 DG APO Macro is a compact autofocus telephoto zoom lens with a zoom ration of 4 to 1. Its range is useful for portraiture, capturing children playing in …
Tamron Adaptall (QZ-35M) 35-80mm F2.8-3.5 - Pentax Forums
Apr 8, 2025 · The Macro Mode Button allows a ring to be rotated to the Macro setting, whereupon sliding the zoom moves the whole optical assembly forward, acting therefore like an extension …
Vivitar Macro Focusing 75-205mm F3.8 - Pentax Forums
Feb 5, 2024 · The close-focusing capability makes this a quite-useable "macro" lens while maintaining distance from the subject. A nice surprise is that I have a Vivitar "2X-22" 2x …
Takumar-A 70-200mm F4 Macro - Pentax Forums
Jan 27, 2025 · I can't believe I only paid $15 Cdn for this thing. This is a great lens. Nice bokeh, colour, decent sharpness and macro's not bad either. Some people tend to pooh pooh this …
计算机中的宏为什么起名叫宏？ - 知乎
Mar 30, 2013 · 看. Macro (computer science) macro一词不是微软发明的，而是计算机科学中长期存在的一个术语，最早出现在1959年的文章
Macro lens choice for APS-C - PentaxForums.com
Dec 15, 2024 · The Tamron macro lenses - even from the 1980's - have been simply stellar throughout all of their iterations, even on digital. If your macro interests include insects, spiders, …
S-M-C/Super Macro-Takumar 50mm F4 - Pentax Forums
Feb 21, 2025 · The SMC Macro-Takumar 50mm f/4 is a great lens optically and mechanically. As expected for a macro lens, it is very sharp across most of the frame at f/4, and even sharper at …
SMC Pentax-M 100mm F4 Macro - Pentax Forums
May 3, 2025 · - Vivitar Auto Macro 90/2.8 - goes 1:1 without adapters - Pentax M 100/2.8 (non macro) - comparable in contrast and resolution (using macro tubes) and even exceeds it from …
Macro Photography - PentaxForums.com
Aug 19, 2023 · Macro Photography Group Maintained by Rense This is the place to share your ideas and techniques on macro photography, to ask questions, and to start discussions on this …
Tamron SP AF Macro 1:2 (52EP) 90mm F2.5 - Pentax Forums
Nov 21, 2023 · Build quality is great, in most situations (except close focusing) front lens is located deep inside so you don’t need lens hood or filters. Full/limit AF option is very useful. This lens …
Sigma APO DG Macro 70-300mm F4-5.6 - Pentax Forums
Jan 13, 2024 · Sigma’s 70-300mm F4-5.6 DG APO Macro is a compact autofocus telephoto zoom lens with a zoom ration of 4 to 1. Its range is useful for portraiture, capturing children playing in …
Tamron Adaptall (QZ-35M) 35-80mm F2.8-3.5 - Pentax Forums
Apr 8, 2025 · The Macro Mode Button allows a ring to be rotated to the Macro setting, whereupon sliding the zoom moves the whole optical assembly forward, acting therefore like an extension …
Vivitar Macro Focusing 75-205mm F3.8 - Pentax Forums
Feb 5, 2024 · The close-focusing capability makes this a quite-useable "macro" lens while maintaining distance from the subject. A nice surprise is that I have a Vivitar "2X-22" 2x …
Takumar-A 70-200mm F4 Macro - Pentax Forums
Jan 27, 2025 · I can't believe I only paid $15 Cdn for this thing. This is a great lens. Nice bokeh, colour, decent sharpness and macro's not bad either. Some people tend to pooh pooh this lens …
