Found Parts RF with 48mm lens

[OAPOli]

Looking for a "for parts" fixed-lens rangefinder with a 48mm lens. Would like to recycle the optics. High likelihood of failure so cheap is best!!

 

[OAPOli]

Anybody has a Graflex Century 35 (or Kowa Kallo) with the Prominar 48mm f2.8?

 

[grain elevator]

I don't but I'm curious - why specifically 48mm?

 

[OAPOli]

I don't but I'm curious - why specifically 48mm?

I'd like to put the lens cells into a gs645w body to make circular pictures. Tried 45mm and 50mm (Tessars) and they were respectively to far out (~2mm) or in (~3mm). So maybe a 48mm Tessar (or triplet?) will work.

Found a couple 48mm but one was 5-element with shorter back focus. The other was a triplet with front-cell focusing. The donor shutter is too narrow for those (and for faster & larger lenses).

Kowa Kallo 281/35 or Graflex equivalents are the only ones left I think.

 

[darinwc]

Do you need just the lens cells or the shutter assembly as well? And what size shutter? I have an Olympus 48mm f2.8

 

[OAPOli]

Do you need just the lens cells or the shutter assembly as well? And what size shutter? I have an Olympus 48mm f2.8

I just need the cells, compatible with a #00 shutter.

I guess your lens is from the 35-S? I tried it and it didn't work unfortunately (short back focus).

BUT I could use it to restore my 35-S. My sample has degraded cement on the rear doublet (and a sticky shutter but I think I can handle that).

At any rate, thank you!

 

[darinwc]

Send me your address and I will try to get the Olympus cells to you.
Back to this project.. also consider the lens in the Konica III camera. 48mm f2 in a 00 size shutter. Or the early 47mm super angulon came in a 00 shutter!

Btw, if you happen to have a 75mm f3.5 triplet, I could use the cells.

 

[OAPOli]

Send me your address and I will try to get the Olympus cells to you.
Back to this project.. also consider the lens in the Konica III camera. 48mm f2 in a 00 size shutter. Or the early 47mm super angulon came in a 00 shutter!

Btw, if you happen to have a 75mm f3.5 triplet, I could use the cells.

Thank you! I'll send you a PM.

I did test a 45mm f/1.8 from a Minolta 7s but the front cell is too large for the donor shutter. The original 45mm f5.6 is truly tiny. So I suspect most fast lenses won't fit. Too bad because they are more common than simpler/slower lenses.

Kowa Kallo 281/35 or Graflex equivalents are the only ones left I think.

To add to the list there are some Mamiyas with a 48mm f2.8 lens (35-S, 35-S2, Crown) but they likely have triplet lenses. The Kallo seems like a good candidate because the Kowa-H has a Tessar 48mm f2.8 (but with front cell focusing).

 

[grain elevator]

I'd like to put the lens cells into a gs645w body to make circular pictures. Tried 45mm and 50mm (Tessars) and they were respectively to far out (~2mm) or in (~3mm). So maybe a 48mm Tessar (or triplet?) will work.

Found a couple 48mm but one was 5-element with shorter back focus. The other was a triplet with front-cell focusing. The donor shutter is too narrow for those (and for faster & larger lenses).

Kowa Kallo 281/35 or Graflex equivalents are the only ones left I think.

I see, interesting idea. I'm not sold on the idea that FL is such a precise predictor of back focus however. I'd try more of the more common 45mm and 50mm lenses.

 

[OAPOli]

I see, interesting idea. I'm not sold on the idea that FL is such a precise predictor of back focus however. I'd try more of the more common 45mm and 50mm lenses.

For back focus I think you are right. In this case the reference point is the shutter which locates the centre of lens. Usually the principal plane is not too far from the centre in those symmetrical(ish) RF lenses? But yes here a couple mm can get you far from infinity, and nominal FL is usually within 5% of true FL. My 45 and 50mm Tessars were about 5mm apart but maybe that was a coincidence.

So... Photrio please send me all your lens cells!! If it works I'll shoot at least one roll per year! (lol)