Seeking info on this lens.
Triple convertable Turner-Reich Gundelach 8x10 anast f7.0
Worth purchasing? I am assuming it will cover 8x10 - anyone know what the three focal lengths are?
Seeking info on this lens.
Triple convertable Turner-Reich Gundelach 8x10 anast f7.0
Worth purchasing? I am assuming it will cover 8x10 - anyone know what the three focal lengths are?
"I would like to see Paris before I die... Philadelphia will do..."
It's worth what you're prepared to pay for it, be aware they can suffer badly from separation which can be seen around the edges in the photo. Personally I wouldn't pay more than $100 unless it was in excellent condition.
It should be 12" both cells, and Front cell 21", Rear cell 28"
Ian
It is the most notorious sufferer from separation there is because of the number of cemented lenses in each cell! When they are OK, users are quite happy with performance.
Apart from the edge breakdown Ian noted, there are sporadic patches all over the front cell. What will the rear cell look like?
I would look for a series II Velostigmat, or a IIB Tessar for your goals. But the Turner Reich is also and excellent lens. You just have to make sure they're not separated. I've had a few, and most are ok, just a little on the very edge. But be sure before you buy. A touch of separation at the edges or a scratch or two isn't going to hurt a LF lens. I also sent you a PM of a good deal, ending soon.
Garrett
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This is the later version of 25" & 19.5" cells to make a 12" f7 lens to cover 8x10 & was manufactured in Fairport N.Y.Originally Posted by IanG
Versus the earlier version of 28" & 19.5" cells to make a 12" f6.8 lens to cover 8x10 and manufactured in Rochester N.Y.
Separation?
"I would like to see Paris before I die... Philadelphia will do..."
Some glass elements are cemented together. At that time, they'd have used Canadian balsam. This glue can start to fail over time, usually starting at the edges.
“You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
― Alexander Den Heijer, Nothing You Don't Already Know
You will see separation as brownish gunk within the glass, particularly the edges. Some of these have crackling internally throughout. I've heard it's usually in the rear balsam joint. Each of the lens cells is 5 pieces of glass cemented together. I have this lens as well as the 12-21-28. I really like them, and, with the four cells you can mix and match to a lot of combinations.
That one is in an ilex shutter. Mine are both in wollensak shutters. The threads on the two brands do not interchange.
Dan
Be aware that when using it "converted" to longer focal lengths LOTS more bellows extension is required.
I just started to understand what separation is. I recently bought a protar because I thought I knew what I was doing. Now I feel like I've been made a fool because the protar double is supposedly made of two elements of four cells. So with four cells, I'm going to have a lot of separation because it's an old lens and the balsam is rotted. Why is there nothing but misinformation on the internet? There is information, but it is then recounted by others. How do you know the truth? This is very disappointing. Even here, it seems that there are secrets that only special people know and talk about in code. I'm sorry if I sound suspicious, but I've been burned now more than once from people here, and people who I dare not speak against because of their reputation here and my lowly one.
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