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Manual Leica R-Lenses

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  • Leica R-Lenses - page 1

    Leica R-Lenses Januar y 2004 Chapt er 7 : 28-90 mm lens __ LEICA V ARIO-ELMARIT-R 28-90 MM F/2.8-4.5 ASPH by Er win Puts ...

  • Leica R-Lenses - page 2

    Chapt er 7 Leica R-Lenses 1 __Introduction The zoomlens as a species of lens design has had a strange evolution. The first design seems to be the V ario-Glauk ar 1:2.8/25-80 mm for 1 6 mm cine cameras, created by Siemens around 1 936. Especially in movies, the idea of a smoothly changing rat e of magnification is ver y valuable as it can dispense o ...

  • Leica R-Lenses - page 3

    Chapt er 7 Leica R-Lenses 2 __Zoomrange The choice of focal lengths is v er y practical. Many years ago Canon has analysed thousands of phot ographs and concluded that the most often used aper tures and speeds are 1:8 and 1/1 25 and that the most used focal lengths were within the 28 mm and 90 mm rang e. If we believe these studies, the new Leica l ...

  • Leica R-Lenses - page 4

    Chapt er 7 Leica R-Lenses 3 __Optical demands and mechanical con- struction The design has 1 1 elements in 8 groups and emplo ys two aspherical sur faces, one at the first sur face of the front ele- ment and one at the second surface of the last element, incidentally the same as in the original Noctilux 50 mm f/1 .2. The lens has three moving group ...

  • Leica R-Lenses - page 5

    selected because the surface reacts quite well to the black anodizing process (see image 1) . The result of all this effor t is a lens with a very smooth movement of the f ocusing ring and focal length selection. With quite sensitive fingers one can feel some ins tances of friction when you go from 90 mm to 28 mm, so perfection is alway s relative. ...

  • Leica R-Lenses - page 6

    of fine detail. St opping down to 5.6 the performance of the centre now extends o ver an imag e circle of 1 2 mm diameter (see image 3) . There is no trace of astigmatism and a slight field cur vature. Some colour fringing is visible at ver y high magnifications. Distortion is visible with -3% (bar rel distortion) and so is vignetting at 2.5 stops ...

  • Leica R-Lenses - page 7

    Chapt er 7 Leica R-Lenses 7 0 5 10 15 20 Y'[mm] 0 20 40 60 80 100 [%] Aperture Stop 2.8 0 5 10 15 20 Y'[mm] 0 20 40 60 80 100 [%] Aperture Stop 5.6 image 5 image 6 0 5 10 15 20 Y'[mm] -5 -4 -3 -2 -1 0 1 2 3 4 5 [%] Relative Distortion image 7 0 5 10 15 20 Y'[mm] 0 20 40 60 80 100 [%] Aperture Stop 3.4 0 5 10 15 20 Y'[mm] 0 ...

  • Leica R-Lenses - page 8

    Chapt er 7 Leica R-Lenses 8 0 5 10 15 20 Y'[mm] 0 20 40 60 80 100 [%] Aperture Stop 4.0 0 5 10 15 20 Y'[mm] 0 20 40 60 80 100 [%] Aperture Stop 5.6 image 11 image 12 0 5 10 15 20 Y'[mm] -5 -4 -3 -2 -1 0 1 2 3 4 5 [%] Relative Distortion image 13 0 5 10 15 20 Y'[mm] 0 20 40 60 80 100 [%] Aperture Stop 4.5 0 5 10 15 20 Y'[mm] ...

  • Leica R-Lenses - page 9

    Chapt er 7 Leica R-Lenses 9 This is a lens with amazing characteristics. It offers outstan- ding quality and can be compared very favourably to the fixed focal lengths. A de tailed comparison with the equiva- lent fixed focal lengths is possible based on the published graphs in earlier chapters and in the lens data shee ts, avai- lable separately . ...

  • Leica R-Lenses - page 10

    Chapt er 7 Leica R-Lenses 10 __Flare proper ties I made a special study of the flare properties of the lens, as this is the one area where lenses hav e to go 'a bout de souf fle'. V eiling glare is hardly visible at all focal lengths, implying there is no loss of contrast when the background is much brighter than the subject itself. When ...

Manufacturer Leica Category Digital Camera

Documents that we receive from a manufacturer of a Leica R-Lenses can be divided into several groups. They are, among others:
- Leica technical drawings
- R-Lenses manuals
- Leica product data sheets
- information booklets
- or energy labels Leica R-Lenses
All of them are important, but the most important information from the point of view of use of the device are in the user manual Leica R-Lenses.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Leica R-Lenses, service manual, brief instructions and user manuals Leica R-Lenses. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Leica R-Lenses.

Similar manuals

A complete manual for the device Leica R-Lenses, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Leica R-Lenses by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Leica R-Lenses.

A complete Leica manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Leica R-Lenses - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Leica R-Lenses, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Leica R-Lenses, that we can find in the current document
3. Tips how to use the basic functions of the device Leica R-Lenses - which should help us in our first steps of using Leica R-Lenses
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Leica R-Lenses
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Leica R-Lenses in a specific country, if it was not possible to solve the problem on our own.

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