

Now compare it with this:
80 mm, 2.6 micron spots on axis, 6 micron spots full-frame F7.5 - $1300


Buy two (2) of the first telescope and still have $126 in your pocket.
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I think you also need to look at the spot diagrams with the various reducers too: ![]() ![]() The 0.7x looks like it'll be a struggle with even a crop sensor? Although the 0.85x looks much nicer by comparison, they both show strong evidence of chromatic aberration (as would be expected for a doublet). I was actually considering this recently as a "travel" scope due to it's relatively lightweight (for an 80mm aperture at least), but wasn't keen to invest in yet another cheap doublet. I would be very interested in seeing some optical testing from someone though! (I went with an SQA55 in the end instead) |
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It’s a doublet, and not a triplet, so the correction will be poor compared to the PHQ107, which has a triplet plus has built in flattener
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if you primarily shoot narrowband with a mono camera, the 80ED is a far better buy. but if you shoot osc or LRGB, a doublet is a far inferior instrument.
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To be honest, they don't look that great. Now the WO "FSQ 106 clone" does look interesting (if a lot more $$$$)…..
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