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aoresteen
Joined: 26 May 2004
Posts: 67
Location: Newnan, GA, USA
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 Posted: Fri Jun 04, 2004 1:49 pm Post subject: |
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I bought an 8" Tele-Optar off of eBay and it arrived last night. Sadly, the rear elements have terrible separation so I am returning it (seller agreed, no problem).
The Tele-Optar was mounted in a Graflex shutter. The aperture scale was EXACLY the same as my 135mm f/4.7 Optar. Even though the max aperture of the lens is f/5.5, the shutter was marked f/4.7.
1. Is this how the 20cm 8" Tele-Optars came? It seems to me that f/8 on a 135mm lens is different than f/8 on a 20cm lens.
2. Could someone along the way have put the 20cm cells into a shutter they got from a 135mm Optar?
The filter size was strange. It was a 42.5mm screw-in and 1 3/4" slip-on.
Thanks! |
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glennfromwy
Joined: 29 Nov 2001
Posts: 903
Location: S.W. Wyoming
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| Posted: Fri Jun 04, 2004 6:29 pm Post subject: |
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Sounds like it was assembled from different parts, by a shade tree mechanic.
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Glenn
"Wyoming - Where everybody is somebody else's weirdo" |
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Rangemaster
Joined: 06 Jul 2001
Posts: 412
Location: Montana, Glacier National Park
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| Posted: Fri Jun 04, 2004 8:44 pm Post subject: |
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Well at least the seller agreed to take it back, sounds like a miss-match of various parts, the last lens that I had that was simular was not in a Graphex shutter..
Dave |
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45PSS
Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.
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| Posted: Sat Jun 05, 2004 1:22 am Post subject: |
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On 2004-06-04 06:49, aoresteen wrote:
1. Is this how the 20cm 8" Tele-Optars came? It seems to me that f/8 on a 135mm lens is different than f/8 on a 20cm lens.
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fanything is fanything on any lens.
f is a function of the relationship of the aperture opening to focal length of the lens.
f1 on a 50mm focal length lens will have an aperture opening that is 50mm; f1 on a 24mm focal length lens will have a 24mm aperture opening. The aperture scales will be different.
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The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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troublemaker
Joined: 24 Nov 2003
Posts: 715
Location: So Cal
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| Posted: Tue Jun 08, 2004 8:31 pm Post subject: |
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1-3/4" is standard for Tele-Raptar and or Tele-Optar made by Wollensak. IT is also standard for the 162mm Optar and I imagine various other lenses. They use series VII accesories.
stephen |
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