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Thread: Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

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    Member patashnik's Avatar
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    Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

    Hi,
    I was wondering if anyone had a photo of how the two 21mm Zeiss' lenses look on a Leica M? I'm wondering if the size difference is large, and specifically the f/4.5 is interesting.

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    Member dierk's Avatar
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    Re: Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

    I have the C-Biogon and like it very much, but I can not compare the two.
    For me the main agvantadge of the C-Biogon is no distortion

    here are many examples (with M9)
    regards
    dierk
    my flickr

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    Re: Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

    Technical Specifications

    Focal length 21 mm
    Aperture range f/4.5 - f/22
    Dimensions (with caps) 53 mm, length 56 mm
    Weight 210 g
    From Popflash: "ZEISS DOES NOT RECOMMEND THIS LENS (f/4.5) FOR USE WITH THE LEICA M9 DUE TO COLOR SHIFT"

    Focal length 21 mm
    Aperture range 2.8 – 22 (1/3 steps)
    Dimensions (with caps) 53 mm, length 75 mm
    Weight 280 g

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    Re: Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

    Zeiss is talking about reddish vignetting on the left side of the frame with M9. You won't like this - but you can fix it with CornerFix.

    I use the f2.8, which is a fine lens. The price increase over the f4.5 was a lot less than I'd expect, & for that reason the slower lens seemed 'uninteresting.'

    I use the 2.8 with external viewfinders (28 & 21mm) on both M8 & 9. If you wear glasses you can't see the framelines with M8, & you don't have 21 lines in the M9. Interference of larger lens & hood isn't a problem if you use an external finder. The CV external finders are OK – you don't have to buy the more expensive Zeiss ones.

    I recommend a hood, because I got some flare, probably from M8 UVIR filter, when I tried to get by without one.

    The 25/28mm hood works better on the M8 than the 21mm hood, but it vignettes a bit on M9 (or on film M).

    Kirk

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    Member patashnik's Avatar
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    Re: Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

    Thank you all, I decided to go with the Biogon C. The issues on the M9 doesn't worry me, since I'm not interested in digital M.

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    Re: Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

    Quote Originally Posted by dierk View Post
    I have the C-Biogon and like it very much, but I can not compare the two.
    For me the main agvantadge of the C-Biogon is no distortion

    here are many examples (with M9)
    hi, i have seen your link to pics with M9, pl give some details of your experience with ziess on M9 and which ver. F2.8 or f4.5 (colour sift, coding etc)

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    Re: Size of Zeiss Biogon C 21mm f/4.5 and Biogon 21mm f/2.8?

    Quote Originally Posted by thompsonkirk View Post
    Zeiss is talking about reddish vignetting on the left side of the frame with M9.
    Any idea what causes this?

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