I am an enthusiastic amateur photographer trying to get into large format. Recently a series of lenses has come to my attention. They are old Schneider Symmar lenses, and have focal lengths of 150mm, 210mm and 360mm. By removing the rear elements they become respectively 265mm, 370mm asnd 620mm. They are all in mint condition.

However, in a bizarre twist they are being used in process cameras and do not have shutters. Consequently they are very cheap.

By surfing the net I have discovered that B&H photos sell Copal shutters by mail order. I have some technical data on the Symmars. The lower two take Copal 1 shutters. The 360mm has 5FS in the shutter column.

The B&H catalogue states that the Copal 1 shutter has a front thread of 40mm and a rear thread of 35mm. However the Schneider website states that the Copal 1 sh utter has a thread of 39mm. This has confused me.

Can anyone tell me if a mail order shutter is going to fit these old lenses? I w ould like to know this before I commit to either purchase. And what does that 5F S mean for the 360mm? Will a Copal 3 fit it?

I would be extremely grateful for any information you could provide me with.

Happy New Year.

Andrew Herrick