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williammontalvo
Joined: 07 Jul 2002
Posts: 39
Location: Northeastern USA
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 Posted: Tue Dec 17, 2002 9:02 pm Post subject: |
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Hello,
I have two things called Portra lenses. One is a Portra +2 and the other is a Portra +3. Can anyone tell me what these things are used for and how to use them? They look like filters.
Thanks,
Bill
[ This Message was edited by: williammontalvo on 2002-12-17 13:02 ] |
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AWT
Joined: 05 Sep 2002
Posts: 57
Location: Upstate SC
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| Posted: Tue Dec 17, 2002 9:31 pm Post subject: |
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The "Portra" lenses are add-on lenses that convert your standard lens into a PORTRAit lens, hence the name.
The numbers represent diopter adjustments (+1, +2, +3).
Just beware: on my 135mm, f/4.7 lens I got a bit of vignetting with a +3 lens.
Conversely, Telek add-ons convert your standard lens into a modest telephoto lens.
Also be aware that any such add-on lens will come at the cost of some sharpness. Although, I used a Telek +3 recently to photograph a waterfall in the woods with good results. The 16x20 print looked great!
[ This Message was edited by: AWT on 2002-12-17 13:32 ] |
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hellerharris
Joined: 27 Jun 2002
Posts: 46
Location: Los Angeles
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| Posted: Tue Dec 17, 2002 10:45 pm Post subject: |
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I have some "Porta" adapters for the Rodenstock Ysarex 127mm lens on my converted Polaroid 110a. They are part of a closeup kit that comes with a small metal tape measure. Are these different items, or can I also use these for portrait work?
thanks,
Heller
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