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Mandler 19mm-R ver. I and Karbe 18 mm-M


ericborgstrom

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Two lenses with 40 years between them, one made in Canada the other in Germany. Photos shot with Leica M240 on a tripod at f/11. The second with a wider view of course is the 18mm.

 

–Eric

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That is also my conclusion. You need to print realy large to see much of a difference at f/11. But the older lens has unsharp corners at f/2.8. The Karbe lens is much better at full aperture.

 

–Eric

 

Newer M lens is also almost f4, that in itself provides more sharpness than f2.8 for given focal length.

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My 19mm suffered from severe flare if pointed anywhere towards the light. I have the 21mm SEM which is amazingly flare resistant as is the 18mm I'd guess.

 

It also has an "interesting" distortion profile. Not visible in the pictures shown but for architecture the 18mm wins hands down - especially if the ACR profile for the 18mm is applied - distortion is then in the process lens class.

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Is the 18mm wider than the 19mm?

 

The upper right corner in the first one seems,,, very bad af f/11 IMHO

 

One of the issues that Leica had to address was the fact that legally, at least in the UK, it was not a 19mm lens. They took, most unusually, to quoting the diagonal field of view, 97.5 degrees. This implies a focal length greater than 19.5 mm and hence it should have been described as a 20mm lens. I believe it was actually 19.7 mm.

 

The 18mm is actually 18.3 mm.

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