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Thread: D-lenses designed for Leica R10?

  1. #1
    Michael B. Elmer
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    D-lenses designed for Leica R10?

    Just a funny but interesting thought:

    Leica R-lenses can be used on Leica Digilux 3 by way of an adapter.

    The format of Leica D is half that of a full frame, so a Leica D 3,5/14-50 vario lens correspoinds to a 28-100 lens in full frame.

    We also know that Leica will introduce R 10 at Photokina 2008 or at least give a clue of it. We also know that it will be a full frame (or more?) camera, and that a new line of lenses with autofocus will be launched as well.

    So: here is my question: Could Leica D-lenses with just a few alterations be used on Leica R 10. In that case, Leica would already have a 28-100 mm zoom lens for the R 10 and a 1.4/50 mm lens, and we would already know those lenses.

    Could anybody elaborate further on this or is it only stupid speculation?

  2. #2
    Subscriber Member jaapv's Avatar
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    Re: D-lenses designed for Leica R10?

    In a lens designed for a smaller format, the circle of coverage is also smaller. So you would have no corners....
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  3. #3
    Michael B. Elmer
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    Re: D-lenses designed for Leica R10?

    Quote Originally Posted by jaapv View Post
    In a lens designed for a smaller format, the circle of coverage is also smaller. So you would have no corners....
    Yes, I understand that - but are those lenses designed exclusively for the D-format - or are they really designed with the R10 in mind?

    To illustrate my way of thinking: On the M8, the M 21/2.8 asph works like a 28/2.8 asph, because of the multiplication factor (1.33 x FL).

    The format of the sensor in the Leica D is half of full frame. The 14-50 mm lens thus corresponds to a 28-100 lens on the 35 mm format, i.e. on the analogue R9.

    My question, thus, is: Could it be that the D-lenses are in fact designed for Leica R, so that they could with another mount be used on the R10?

    From a design and production point of view, that would make sense for a small company like Leica.

    But of course, one has to possess a D-lens to evaluate this possibility. I do not.

  4. #4
    Senior Member Robert Campbell's Avatar
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    Re: D-lenses designed for Leica R10?

    Quote Originally Posted by Michael B. Elmer View Post

    The format of Leica D is half that of a full frame, so a Leica D 3,5/14-50 vario lens correspoinds to a 28-100 lens in full frame.

    We also know that Leica will introduce R 10 at Photokina 2008 or at least give a clue of it. We also know that it will be a full frame (or more?) camera,
    The 14-50 would remain a 14-50 on full format - or any format. But it's designed for a much smaller sensor, therefore would only 'fill' the centre of FF. It may act as if it was 28 - 100 on FF, but this is equivalent field or angle of view - it cannot change from being 14 - 50.

    Full frame lenses have an image circle of about 43 mm - the diameter of FF. The 'largest' sensor which would work with these lenses is about 30 x 30 mm.
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  5. #5
    Subscriber Member jaapv's Avatar
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    Re: D-lenses designed for Leica R10?

    Quote Originally Posted by Michael B. Elmer View Post
    Yes, I understand that - but are those lenses designed exclusively for the D-format - or are they really designed with the R10 in mind?

    To illustrate my way of thinking: On the M8, the M 21/2.8 asph works like a 28/2.8 asph, because of the multiplication factor (1.33 x FL).

    The format of the sensor in the Leica D is half of full frame. The 14-50 mm lens thus corresponds to a 28-100 lens on the 35 mm format, i.e. on the analogue R9.

    My question, thus, is: Could it be that the D-lenses are in fact designed for Leica R, so that they could with another mount be used on the R10?

    From a design and production point of view, that would make sense for a small company like Leica.

    But of course, one has to possess a D-lens to evaluate this possibility. I do not.

    No. The basic design might be similar, but the dimensions of the barrel are too small, correction would be different - a different lens altogether for the larger format.

    Lens design is a highly complicated art that has no one-size fits-all type of solutions.
    Last edited by jaapv; 12th March 2008 at 10:27.
    JAAP
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    The colours of my generation are black and white.

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