Lionblueyes

Hi everyone, Thank you for all the information put up here, I've read and hopefully understood at least a significant part of it. As I look as the Askar 103 triplet, my main use would be with a 533MC-Pro, ideally with all 3 reducers/flattners sooner or later (on a NEQ6, in case you wonder). I have understood a big chunck of the limitations of the triplet but still trying to understand if for a small sensor and, possibly, up to a APS-C OSC sensor you consider this a good option. My other options would be for instance a TS 102 FPL 53 triplet, limiting only to flattner and 0.6x reducer. Reviews on youtube and some photos on astrobin seem really convincing, but the math I saw here kind of points in a different direction.