Leica 11645 manual

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A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of Leica 11645, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Leica 11645 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of Leica 11645. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of Leica 11645 should contain:
- informations concerning technical data of Leica 11645
- name of the manufacturer and a year of construction of the Leica 11645 item
- rules of operation, control and maintenance of the Leica 11645 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Leica 11645 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Leica 11645, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Leica service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Leica 11645.

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It is mostly in the manuals where we will find the details concerning construction and possibility of the Leica 11645 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

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Table of contents for the manual

  • Page 1

    LEICA SUMMARIT -M 7 5 mm f/2.5 1 The LEICA SUMMARIT-M 1:2.5/7 5 mm is a new "shor t telephot o" lens that is significantly smaller and lighter than Summicron lenses with the same focal lengt h, but still of fers the image quality that is the hallmark of Leica M lenses. Combined wit h the 35 mm Summarit-M, it mak es up an ideal shooting ou[...]

  • Page 2

    LEICA SUMMARIT -M 7 5 mm f/2.5 2 T echnical Data Angle of view(diagonal, horizontal, v ertical) Optical design Distance setting Aperture Bay onet Filter mount/Lens hood Dimensions and weight For 35 mm (2 4 x 36 mm) : 32°, 27°, 1 8°, for LEICA M8 (1 8 x 27 mm) : 2 4.4°, 20.4°, 1 3.7°, corresponds to a focal length of appro x. 100 mm with 35 mm[...]

  • Page 3

    LEICA SUMMARIT -M 7 5 mm f/2.5 3 0 5 10 15 20 Y' [mm] = 2 1 .0000 0 20 40 60 80 10 0 [%] Aperture Stop 2.5 0 5 10 15 20 Y' [mm] = 2 1 .0000 0 20 40 60 80 10 0 Aperture Stop 5.6 [%] 0 5 10 15 20 Y' [mm] = 2 1 .0000 0 20 40 60 80 10 0 [%] Aperture Stop 4.0 MTF graphs The MTF is indicated both at full aperture and at f/5.6 at long takin[...]

  • Page 4

    LEICA SUMMARIT -M 7 5 mm f/2.5 4 Distortion Vignetting 0 5 10 15 20 Y' [mm] = 2 1 .0000 -5 -4 -3 -2 -1 0 1 2 3 4 5 [%] Relative Dis tor tion 0 5 10 15 20 0 20 40 60 80 10 0 [%] Vignetting 2.5 4.0 5.6 0 3 6 9 12 15 18 X'[mm] 0 3 6 9 12 Y'[mm] Ef fective Dis tor tion Distortion is the deviation of the real image height (in the picture)[...]

  • Page 5

    LEICA SUMMARIT -M 7 5 mm f/2.5 5 Depth of field table Magnification 0,9 0,890 - 0,910 0,889 - 0,912 0,884 - 0,917 0,877 - 0,924 0,868 - 0,934 0,857 - 0,948 0,839 - 0,972 1/9,92 1 0,987 - 1,013 0,986 - 1,015 0,980 - 1,021 0,972 - 1,030 0,960 - 1,043 0,946 - 1,061 0,924 - 1,091 1/11,3 1,2 1,181 - 1,219 1,179 - 1,222 1,170 - 1,231 1,159 - 1,245 1,142 [...]

  • Page 6

    LEICA SUMMARIT -M 7 5 mm f/2.5 6 Aperture Stop 8 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ∞ 8 3 2 1,5 1,2 1 0,9 Distance Setting [m] Depth of Field [m] Aperture Stop 4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ∞ 8 3 2 1,5 1,2 1 0,9 Distance Setting [m] Depth of Field [m] Aperture Stop 5,6 0 1 2 3 4 5 6 7 8 9 10 11 12 13 1[...]

  • Page 7

    LEICA SUMMARIT -M 7 5 mm f/2.5 7 Leica Camera AG / Osk ar- Barnack- Straße 1 1 / D- 35606 Solms / T elefon + 49 (0) 6442 - 208- 0 / T elefax + 49 (0) 6442- 208 - 333 www.leica- camera.com / info@ leica - camera.com Aperture Stop 11 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ∞ 8 3 2 1,5 1,2 1 0,9 Distance Setting [m] Depth of Field [m] [...]