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Search results for 'ts optics 61edph 5 element flatfield apo 61 mm aperture f 4 5 ts61edph 4250477963810'

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  1. Artesky introduces the new line of APO ED refractors, the new 102mm doublet with 2 element objective, the first is a FCD1-B Ohara (Japan) element while the second is a Lanthanum element. It is possible to reduce it with a factor of 0.8x and bring it to a focal length of 570mm with factor F/5.6 or use it at full focal length with the 1x variable field flattener.

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