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Dear Jan,

Thanks a lot for the info. Very busy with work and life in general, hope to get back into this after the coming chinese new year.

Would love to get my hands on the PP book, please...

Dear Jan,

How do you determint the FL for the PP Lens? Do you use this formula?

1/F = 1/f1 + 1/f2 - D / (f1*f2)

How about the Aperture for the lens PP lens, any formula?

Anyway, looking...

86mm?

Just like everything in life...

All the Chinese Roll Film Backs have leaks, reported on various mainland china forum.

ShenHao, DaYi, Gao (Not sure about the name, but this is the cheapest, they also make the 617). Some of the...

Hi Jan,

More photo of your lens project please?



Will

4x5 or the FCL-57?

Nice, handled a FCL-810 in Guangzhou when it frist came out.

Just think if they make a 4x5 with that minimist design :)

Hello,

I found 2 early Heliars (15cm, 18cm) in Hong Kong, and they are in early compur shutters (see pic) without mounting flanges. I found some mounting flanges from SK; I am just wondering are...