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My Lubitel was nice and sharp. It scratched film, each and every roll, but it was sharp!
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Minor point...if it's a triplet, it's not a Tessar...although the Tessar is considered a variant of a triplet, with one element split into two components.
Sam Wang has used a 'wide angle' 50 mm lens from I think some kind of Mamiya MF camera and got a nice clean round image on 4x5. I didn't find out exactly what lens...nor was it inexpensive or available to me.
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 Originally Posted by walter23
You may be disappointed with the nice sharpness of the lubitel lens, if you want the toy camera look. Maybe it's not a Zeiss hasselblad T* lens or anything, but it's far from a crappy lens.
I guess the areas outside of the 6x6 film area might be degraded though.
That's exact. Having the camera saved from hands of a not knowledgeable amateur I always wondered at it quality/simplicity ratio.
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Originally Posted by Tomf2468
My Lubitel was nice and sharp. It scratched film, each and every roll, but it was sharp!
Why did you let the camera scratch all your films? The offending part is usually not difficult to find and a little friendly talk can make wonders 
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Originally Posted by Tomf2468
Put a long round lens shade on it. It will take some experiments to find just the right length, but it will give you a "mechanical" limit to the lens's coverage and form a nice circle.
Not true, sorry. If you make it long enough to make "a nice circle" (sharp edges?) it will be too long and will give just a small image circle (otherwise its dimension would be colossal). If you make it short, it won't give you "a nice circle" then. Try to put a finger in front of you lens - when you finally can see it sharp (provided the lens is focused at infinity) it will be too far from you. Closer it won't be sharp. The same is valid for a rounded lens shade.
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it's fine, my purpose is not having a sharp round edge, I want the image to fade away gradually
Interested in converting a Polaroid 110B into a compact 4x5" rangefinder camera? Check out how I did it here.
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Originally Posted by Fulvio
it's fine, my purpose is not having a sharp round edge, I want the image to fade away gradually
good, then use it as is.
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