Agfa 135 mm old lens

While checking 5×4 camera and the existing stock of component, I found an old Agfa 135 mm F4.5 Doppel Anastigmat lens on a Pronter shutter. (It seems this lens came from old german 6×9 Rietzchel camera) I’ve been wondering the focal length of 135mm lens = why and where it’s originated ? ? ? —– It seems 135mm lens was common in the old wooden camera. And mounting screw of 39M of this lens might be a kind of standard in that day = hence Lica camera adapted 39M screw maunt for their camera as well.

So, using 39M to 42M adapter, 42M to 42M Helicoid ring and the 42M extension rings this Old Agfa lens was easily mounted on the Sony A7R 4 camera. (But being old lens without a corting on top of the fog, the image made by this lens was pretty foggy.)

Agfa 135mm

Despite such old lens a Doppel Anastigmat lens still has certain quality. (But not a kind of German Zeiss like softness) >>> https://yoshizen.wordpress.com/2015/05/14/what-is-the-softness-of-a-lens/

The remaining question is, the camera had no focusing system = the people then didn’t mind a bit of out of focus ? ? ? (The image of the 135mm lens may not be covered by even a smaller F-aperture)

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