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Old 05-01-2017, 08:11 PM
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AstroJunk (Jonathan)
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AstroJunk is offline
Join Date: Jan 2006
Location: Brisbane
Posts: 1,682
I thought all refractors (like cameras) had spherical optics and hence the need for exotic materials and designs to fix the inherent issues introduced by spherical and chromatic aberrations. (Very happy to be corrected on this point). You may be able to change the spacing little else. All I can see is the edges dropping off on a short FL refractor being used with a camera with too large a sensor.

I think you need to collimate your expectations of this telescope and buy a field flattener
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