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GregT.
Joined: 07 Jan 2005 Posts: 5 Location: Pacific Northwest, USA
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Posted: Sun May 15, 2005 4:54 am Post subject: |
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Would someone with better math skills than me (that's pretty much everyone) please verify this: does the resulting focal length of a 203mm Kodak Ektar plus Kodak Telek Minus 1 come out to about 260mm?
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worldphoto
Joined: 05 Feb 2003 Posts: 199 Location: Southern California
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Posted: Sun May 15, 2005 7:21 am Post subject: |
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I estimated a 50mm distance between lens centers and got 240mm. Then I estimated a 25mm distance between lens centers and got 247mm. Your lens focal length should be somewhere between those two values.
Harry
A minus 2 lens would get you approx. 295mm, requires nearly 12' of bellows at infinity! My 360mm lens with a -2 lens gives me nearly a 900mm lens,it requires a 36" or more bellows on my view.
[ This Message was edited by: worldphoto on 2005-05-15 00:42 ] |
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GregT.
Joined: 07 Jan 2005 Posts: 5 Location: Pacific Northwest, USA
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Posted: Sun May 15, 2005 3:49 pm Post subject: |
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Harry,
Thanks...makes sense now.
Greg |
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