luciano_capitanio1 Posted March 16, 2004 Share Posted March 16, 2004 I wish to know your opinion. Do you think it is useful a Fresnel screen on a 8x10" using a 360mm lens (as Nikkor W or Apo -Symmar)? Many thanks for your answers Link to comment Share on other sites More sharing options...
bruce_barlow Posted March 16, 2004 Share Posted March 16, 2004 I got one, and now wouldn't live without it -- makes all the difference in the world. Bruce Link to comment Share on other sites More sharing options...
allen_whittier Posted March 16, 2004 Share Posted March 16, 2004 That's about the focal length of the reading fresnels at the book store. Why don't you get one to see if you like it. Borders sells one for $5. It's what I use with my 5x7. I just hold it up to compose; brightens the corners nicely. A cheap way to answer your question. Link to comment Share on other sites More sharing options...
luciano_capitanio1 Posted March 16, 2004 Author Share Posted March 16, 2004 Here in Italy is not so easy to try. It's really difficult to find one of this size (I have a Cambo legend plus). And if you find one , the cost is always more of 180-200 Euro. So, before to buy one, I wish to know some practical opinions... Link to comment Share on other sites More sharing options...
john_kasaian1 Posted March 17, 2004 Share Posted March 17, 2004 Luciano, I have two lenses in that length---a f6.3 Commercial Ektar and an f9 APO Artar and I've gotten along just fine without a fresnel. If I were having problems focusing however, I'd certainly look into getting one but so far(about 4 years now) no problems with either. I do use a loupe for focusing. Cheers! Link to comment Share on other sites More sharing options...
uli_mayer Posted March 19, 2004 Share Posted March 19, 2004 Luciano, you may get a fresnel screen big enough for 8x10 for a much lower price from manufacturers/distributors of overhead projectors. Since those screens are square, mostly 28x28cm, you will have to get it cut to fit your ground glass ( by a window maker for instance ). I got mine in Munich for less than 40 Euro and did the cutting myself with a fine toothed saw. Beware: One has to cut symmetrically in order to keep the Fresnel lens centered. Link to comment Share on other sites More sharing options...
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