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Longer focal length instruments suitable for imaging get expensive quickly. Wouldn't it be nice if we can just have one OTA in the medium focal length range and just change the cameras to suit the targets. I guess with smaller pixels the area covered by each pixel becomes smaller rendering each pixel less sensitive. My question is, what is the current sweet spot in terms of smallest pixel size that will still have sufficient sensitivity? I am really tempted by the QHY183 (or the ASI equivalent) as it has 2.4 micron pixels and reasonable FOV at 6MP.
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