While i agree that the Mak-Newt is great choice, I owned one for years and miss it now. Be aware that there are a few variations in the product line. The newest ones being sold now have a larger secondary mirror than the originals, I believe the current crop use a 64mm secondary. This change was made to facilitate larger format cameras, which would experience vingeting with the original small secondary (52mm). The consequence is less resolution with the larger secondary due to greater central obstruction. The small secondary model is fine for up to APS-C sized sensors, and in my opinion the one to buy. The originals are tightly held by owners so you may have to wait to find one.
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