Any 240mm lenses f5.6 or faster that fit Copal 1 or other #1 shutters?

[Leigh]

1:1 would require double the distance of infinity focus, right? So if flange-focus distance at infinity is 155 mm, 1:1 would be 310mm (right?) - I think that is how it works, but someone else could likely confirm that.

Nope.

1:1 focus requires infinity focus (flange focal distance) + optical focal length.

For example, given a 300mm lens with a 280mm flange focal distance, the 1:1 distance
from lensboard to film equals 280 + 300 = 580mm.

- Leigh

[Misko]

1:1 focus requires infinity focus (flange focal distance) + optical focal length.

Thank you sir.

So for Tele Arton 270mm it would be: 155mm (ffd) + 270 (ofl) = 425mm for 1:1 enlargement?

And do you know how do I calculate the length for other enlargements between infinity and 1:1?

M

[NickyLai]

Schneider 240mm 1:5.5 Tele-Xenar most likely is in older shutter #1 .

Just came around this Schneider 1938 leaflet for tele-xenar, like to put up for reference:

https://www.schneideroptics.com/info...38_Leaflet.pdf

It included 180-240-270-300-360mm all in f5.5, and the 180 and 240 also in f4.5.

[EdSawyer]

Misko I would go for the Tele ARton 270 vs. the 240. The flange focal distance is basically the same, maybe even a touch shorter for the 270, depending on version. and, you can usually find it in COmpur 2 shutter which is useful for other reasons we've discussed.

I just pulled the trigger on a Tele Arton 360/5.5 in Compound shutter. It has crazy short flange focal distance of 209mm, so should work on my SuperD 3x4 that is converted to 4x5 Graflok. The FFD on the nikkor 270T that I use on there is 187mm or so, so only another 20mm or so. It's a huge lens from what I can see though. The price was cheap enough that even if it doesn't work out I can always find a new home for it if need be. Bokeh @ f/5.5 should be superb hopefully, for portraits. (Equiv of dof/bokeh of 180mm @ f/2.8 or so, I think - right?)