ray_bohn

I witnessed the disposal of hundreds of historical items from a previous graphic arts program because the local printing company association advisory board deemed them worthless in the "Digital Age". I rescued two sets of glass plate separations (class projects) that were evidently produced by tech college students from a Kodachrome transparency (enlarged from 35mm?). Since Kodachrome was not released until approximately 1936, I am curious as to what was the date range of glass plate use in the graphics world. I am assuming that flexible film sheets for graphic arts were also available? Factory code (?) on back of box - VCP5H65151B. The B is reversed. Plates are approximately 8"x9.5". I have included images. Thanks for any information that form members can provide.

Thanks, I used 3-in-one silicone. It took about 3 days before it finally loosened up. There are several used ones on the market but I found that several of the sellers know nothing about these flashes and send out duds as "fully tested". Luckily I have been able to get credit on them without sending then back.

This flash has functioned for several decades. I have a Metz CT-4 that has been working well. Today I found that the ASA dial is frozen. Any ideas- disassembly instructions, lubrication, etc? Thanks

I saw an actor on a sitcom use a SLR with an integral prism. This series was characterised as taking place in WWII. It made me wonder when the first SLR that used a prism was produced? Thanks

<p>I am not new to photography, but new to digital equipment. I am confused about flash guide numbers. My last flash had a GN 110. I think that meant that I had to use F11 at 10 ft with ISO 100 film.<br> I now have a Olympus E510. The built in flash Guide number appears to 12m. Does that equal to a GN in Feet of 36 or F3.6 at 10 Feet? I hope not, because that means I can't shoot over 10 ft based on the largest aperture opening on my lens, unless I select a higher ISO.<br> I am looking at the FL36 flash. Based on what I understand, it has a GN of 85 at 10 ft. Is that correct?<br> Thanks from an old guy.</p>