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Discussion in 'Leica R / Leicaflex Forum' started by LeicaWeddingPhotography, Sep 22, 2014.
Here is one example of Leica r80mm, f 1.4 (summilux)
and one black and white...
love the mood in both, as well as the unique lens character. thats one big boy though, no?
I wrote an article about the lens: http://jipvankuijk.nl/summilux-r-80-leica-r8-m-typ-240/
Optically, what relationship between the 75 and the 80?
The 75 and the 80 are identical, except that due to the smaller form on the M the focal length was changed from 80-75 so it matches the 75 frame lines then. It was not possible to make it a 90 and still retain the f1.4.
The 80 is a bit better, but optically they are the same. You will see this when you compare images from the two. However the 80 is a bit better overal. Size wasn't a problem.
Did they just change the distance between the front and rear modules? Is there a measurable difference in the physical length of the two lenses?
I've changed focal length on a few lenses before, changing spacing between front and rear groups. The change in space between the optics versus the (small) change in focal length surprised me.