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Someone can provide news about a lens that I received with in wooden camera 5x7 (I assume early 1900) This is a lens RAPID EURYSKOP witout any reference to Voigtlander, central iris with f 6 to 32...

Tanks

Very good suggestion. I have a look to the website of Fotoman .Nobody in Italy is selling it but i see that I can find the viewfinder and/or the rangefinder in England and in France.
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Normally I use a Toyo field camera AII with the tripod but now with the restriction in several place of the use of the camera with the tripod ( "not flash o tripod please" ) i would like to...

Thanks Arne

I use sin and not tan but may school time is finish long long time ago.
Just a silly question . The geometrical conclusion is that if I use the lens for a distance less that infinity ...

Thanks to all.

At Uli because it give me an idea about the scale of value (if the price means something) and to Arne because now I understand the formula to calculate the imagine circle (realy i...

I have the possibility to bay a Carl Zaiss Jena 450 mm Apo tessar.
In some plaice in this forum I read that a apo tessar cover more o less a little bit more that the focal length , that means that...

Bob you are right.

It was may mistake . I read right the technical specification but I do a mistake in the translation from mm to inch.

I was really concern about a “reduction” in the image...

Thanks a lot for the help!

Is it possible to calculate the image circle at the different f stop and focus distance knowing the Angle of view and the image circle at f : 22 ? In other word is...

I plan to use may Apo – Sironar N 240 mm that normally I use for the 4 x 5 on a 8 x 10 camera.
From the technical spec. I know that the 240 mm cover just the 8 x 10 with more o less half a inch...

Thanks to everybody. Very helpful.

Now I understand that I have a big 4 X 5 or, putting in a different way a small 8 x 10

I just bought for 200 Euri a strange animal (without the bellow): the back is Toyo 8 x 10 GII (all black), the front is a Toyo 4x5 C (all black) , the monorail is chromate. It is just a matter of...

well Now i'm better

Giorgio

Please I need some help.

I couple of months ago I bought a G Claron 355 in barrel . Now looking at the lens in transversal way I see like dust into the front cell.
I asked to the seller if it...