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Also to that end, worth noting that the FSQ106 with its reducer still works brilliantly with the 16803 sized sensor. And as Greg said, while the 16803 is not a common sensor like it used to be, if you want to produce an amazingly wide field image, at the same time, having beautiful image quality, an FSQ106 + 0.73x + 16803 is THE way to do it.
I guess having the Askar SQA106 is a nice substitute for lower budget imagers, and their spot diagrams indicate sub 3micron spot sizes at r=27mm, considerably larger than 35mm full frame. Vignetting will be a concern with a 2.8" focuser I think... But, If someone was about to pull the trigger on a FSQ106 and a APS-C sensor rig, this could provide them with something that for all intents and purposes, is very similar, for a fraction of the price...
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