Richard K.

20-Feb-2010, 09:55

I have two Dallmeyer WAR type lenses and would like to know the f-stop sequence for the apertures on the wheels. It's hard to measure their diameters precisely to relate to the wide open one. Is there a published scale, or has one of you determined this? The lenses are:

Dallmeyer Wide Angle Rectilinear No.1 7” f/16 1895

This one has 6 stops including the maximum hole.

and

Dallmeyer Wide Angle Rectilinear No.3 13” f/15 1867

This one has 5 stops including the maximum hole.

I'm also not 100% sure about the maximum aperture I have stated but I think it's right based on the D.O.B. of the lens. It would be nice if they just went f/16 or 15, f/22, f/32, f/45, etc

Thanks for your help!

Dallmeyer Wide Angle Rectilinear No.1 7” f/16 1895

This one has 6 stops including the maximum hole.

and

Dallmeyer Wide Angle Rectilinear No.3 13” f/15 1867

This one has 5 stops including the maximum hole.

I'm also not 100% sure about the maximum aperture I have stated but I think it's right based on the D.O.B. of the lens. It would be nice if they just went f/16 or 15, f/22, f/32, f/45, etc

Thanks for your help!