It doesn't have to be a close match. You will see the differences when switching from WA lenses to normal or to long focal lengths. Going from a 150 to a 210 shouldn't be much if any differences. This is little different from changing condensors in an enlarger when changing the lens. The fresnel is merely a lens that has been collapsed down in concentric segments. A side profile will show the curvature of the lens, each fresnel has its focal length and can focus an image at that distance like any other lens.gma said:From the responses it sounds as if a fresnel screen is not the best solution unless you are using only one lens with a focal length that "matches" the fresnel.
Hi Kev, with the Beattie screen it does appear more difficult to view the whole image at once. If the acid etched is brighter than the ground glass that the Shen-Hao came with, you may find it to be adequate. Unfortunately I haven't compared them both so I can't really make a suggestion. But I find the Beattie great once you get used to the screen texture (and very bright).kjsphoto said:Would a Acid Etched GG work better with eh Shen Hoa or is the Beattie the way to go....
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