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| coverage of a Tominon 75mm lens | |
| Author | Message | ||||
|---|---|---|---|---|---|
| jnanian Joined: 22 Jan 2002 Posts: 21 |  Posted: Tue Feb 05, 2002 2:21 amwill this lens cover a 4x5 negative? thanks! -john | ||||
| Les Joined: 09 May 2001 Posts: 2682 | Posted: Tue Feb 05, 2002 3:27 am I'm gonna guess here since you didn't state the aperture. I believe this came off a Polaroid copy camera and at something slightly beyone 1:1 it will cover 4x5, but people on ebay continually believe that back in the good old days they could make a fast 75 or 72mm lens (f1.9-4.5) that will cover 4x5 at infinity and somehow we just can't do it today. Film Feathers!! B&L made/makes a 72mm f4.5 Micro Tessar that I will assume is darn close if not identical to the tominion. I know from experience it won't cover 3x4 at infininty. | ||||
| jnanian Joined: 22 Jan 2002 Posts: 21 | Posted: Tue Feb 05, 2002 3:38 am thanks les - btw it was a 75mm f4.5  - john | ||||
| hellerharris Joined: 27 Jun 2002 Posts: 46 | Posted: Tue Jul 09, 2002 1:38 am Think the Tominon 4.5 would cover a 6X9 or ^x& on a Century? ________ Ford Ranchero Rio Grande history | ||||
| Dan Fromm Joined: 14 May 2001 Posts: 2165 | Posted: Tue Jul 09, 2002 11:06 am
I have one, and some time ago convinced myself that it wouldn't cover 2.25 x 3.25 at infinity. Last weekend I put the lens on my Century and reconsidered. It illuminates 2.25 x 3.25 @ 40', which is close enough to infinity. The film is at the lab, and soon we'll know how much of the image the lens makes @ f/16 is acceptably sharp. If you have one, why don't you try it? Your acceptably sharp might not be the same as mine. Cheers, Dan | ||||
| hellerharris Joined: 27 Jun 2002 Posts: 46 | Posted: Tue Jul 09, 2002 5:38 pm I don't have the lens yet, but they're plentiful on Ebay. If it covers, then I might go for it. I don't love the 6X9 and am looking for a 6X7 back. I'll be anxious to see how you did. ________ buy iolite vaporizer | ||||
| Dan Fromm Joined: 14 May 2001 Posts: 2165 | Posted: Tue Jul 09, 2002 9:26 pm
You do know that the lens is a reverse tessar, and is intended to be used close up, don't you?. On the MP-4 it is supposed to be used from 2:1 to 4:1. It may well perform poorly at normal (infinity, more or less) distances. I don't know whether the 75 Tominon used in Polaroid CU-5s and DS-3xs is exactly the same as the one sold for the MP-4. On the other hand, they offer cheap thrills. Cheer, Dan | ||||
| hellerharris Joined: 27 Jun 2002 Posts: 46 | Posted: Mon Jul 15, 2002 5:25 pm Dan - Did you ever get a look at the stuff from the Tominon? Whattcha think? We're waiting with bated (baited?) breath. heller
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| jnanian Joined: 22 Jan 2002 Posts: 21 | Posted: Mon Jul 15, 2002 6:08 pm hi again it has been quite some time since i posted this orignial message. i ended up getting one of these lenses., and tried like mad to get it to cover a 4x5 unsucessfully. it was great for doing close up work, but since i had hoped to use it as a wide angle lens, i kind of got rid of it. thanks for all your responses, i appreciate your help. john ps. btw i ended up gettng a 65mm f 5.6 super angulon which does everything i had hoped for, and THEN some | ||||
| Dan Fromm Joined: 14 May 2001 Posts: 2165 | Posted: Thu Jul 18, 2002 10:20 pm
Yes, it will illuminate 2 1/4 x 3 1/4. No, it won't work well as a real wide angle lens for out-and-about use. Remember that it was intended to be used at magnifications from 2:1 to 4:1. It is a reversed Tessar, might work better (but who would bother?) reversed in front of a #1 shutter. I also tried out my 100/6.3 Reichert Neupolar at the same distance. A fine, fine macro lens. It covers ok, but the 101/4.5 Ektar (shot it too, same subject, same f/11) takes a better picture. All as expected, I'm afraid. Cheers, Dan | ||||
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