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  1. #11
    John Austin's Avatar
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    You owe me a beer

    Quote Originally Posted by NB23 View Post
    Yes, I know! But I'm using a Focomat IIc and I can't use any lenses except the Focotar 95mm, 100mm, 105mm and 60mm.

    But my question was why exactly is 80mm (or 100mm) better then 60mm (or 50mm) for 6x6? I understand that each focal length is optimized for a given enlargement ratio (10X, for example) and in accordance with the height of the head itself, but if the height of the head is not a problem then why would 80mm be better then 50? What is the real reason behind this? Because saying that a 80mm lens is sharper then a 50mm lens is not true. Besides the ease of use and keeping the ratios sensibly the same why would it be bad to use a 60mm lens for 6x6 format?


    Maybe you can answer?
    I have just got the brand new first series 80mm Componon lens out of its, pristine box and measured it - It fits the Focomat IIc very easily in either side - However, the mounting thread is 25mm diameter, but comes with a flange, so all that is needed is a metal Leica screw thread body cap with a 25mm hole drilled in it to take the lens

    Absolutely simple, but never done as I am waiting to find such a body cap, so the project has remained unfinished for nearly fourty years - Now for that beer!!!

  2. #12

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    You are limited by the lens' coverage. It will likely only work if that 60mm is specifically designed to be a wide-angle lens for medium format film, not if it is designed for 35mm or 126.

    Was the 60mm lens designed for 127 film?
    2F/2F

    "Truth and love are my law and worship. Form and conscience are my manifestation and guide. Nature and peace are my shelter and companions. Order is my attitude. Beauty and perfection are my attack."

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  3. #13

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    I can't test it because my ceiling isn't high enough, but unless I misunderstand the problem you should be able to get up to 16 x 16 inch prints from 6 x 6 negs with the 100 mm Focotar by winding the head up with the large knurled ring on the column sitting under the head assembly. You will lose autofocus, of course.
    Richard

  4. #14
    ic-racer's Avatar
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    Quote Originally Posted by NB23 View Post
    Question for the Experts:

    I want to print 16x16 on my Focomat IIc but my 100mm lens will only go to about 12x12. Obviously, if I use my 60mm lens I will be able to go bigger. What are the drawbacks to using the 60mm lens for 6x6?

    Thanks!
    Unless you have a Wide Angle 60mm lens, you won't cover the format. I'd look for the Rodenstock 60mm f/4 Rodagon-WA Enlarging Lens.

  5. #15

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    Quote Originally Posted by ic-racer View Post
    Unless you have a Wide Angle 60mm lens, you won't cover the format. I'd look for the Rodenstock 60mm f/4 Rodagon-WA Enlarging Lens.
    Why I asked for people in the know is because my 60mm lens does cover the full 6x6 negative and it seems to be quite evenly illuminated, too. But I'll do some tests and update.

  6. #16

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    Yes!! Winding the head up! As stupid as I am, I didn't think of that. Part of the reason is that my Focomat IIc is in my other darkroom while I mostly use my Ic Color these days, in the comfort of my home.

    I will go and try that out asap! I can't ask for more then using my 100mm focotar the most I can :-D

    Quote Originally Posted by youngrichard View Post
    I can't test it because my ceiling isn't high enough, but unless I misunderstand the problem you should be able to get up to 16 x 16 inch prints from 6 x 6 negs with the 100 mm Focotar by winding the head up with the large knurled ring on the column sitting under the head assembly. You will lose autofocus, of course.
    Richard

  7. #17

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    I'd love to try that!
    Buying a modified Componon from Kienzle would set me back a good 1000$ so I never gave it extra thought...

    Quote Originally Posted by jbaphoto View Post
    I have just got the brand new first series 80mm Componon lens out of its, pristine box and measured it - It fits the Focomat IIc very easily in either side - However, the mounting thread is 25mm diameter, but comes with a flange, so all that is needed is a metal Leica screw thread body cap with a 25mm hole drilled in it to take the lens

    Absolutely simple, but never done as I am waiting to find such a body cap, so the project has remained unfinished for nearly fourty years - Now for that beer!!!

  8. #18
    ic-racer's Avatar
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    Quote Originally Posted by NB23 View Post
    Why I asked for people in the know is because my 60mm lens does cover the full 6x6 negative and it seems to be quite evenly illuminated, too. But I'll do some tests and update.
    The Focomat manual and Leica product catalogs I looked at do not indicate if the 60mm is a wide angle or not. So, perhaps it is. Best way to check is with a big enlargement. That will stress the coverage at the corners.

  9. #19

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    But if it was a wide angle, then I don't see why Leica would have gone through all the trouble to create the IIc as a Two-lens enlarger, one for 35mm and one for medium format.

    Quote Originally Posted by ic-racer View Post
    The Focomat manual and Leica product catalogs I looked at do not indicate if the 60mm is a wide angle or not. So, perhaps it is. Best way to check is with a big enlargement. That will stress the coverage at the corners.

  10. #20
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    Quote Originally Posted by NB23 View Post
    But if it was a wide angle, then I don't see why Leica would have gone through all the trouble to create the IIc as a Two-lens enlarger, one for 35mm and one for medium format.
    I don't know what they were thinking either, but 60mm enlarging lens for 35mm film won't give a very big enlargement as the 'normal' focal length for that format is about 43mm.

    The question you can answer is:
    When you raise the head all the way to the top with a 6x6cm negative and the 60mm Focotar lens, do you get good illumination and resolution at the 4 corners?

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