For visual, aperture every time, 120 even better. One rider though, your 60mm x600 is f/10, so probably doesn't show too much false
colour on bright objects, but a 100mm x 600 is f/6 and will most likely show more colour, so a 100mm x900 or so [f/9] would be better,
but becomes quite a large scope compared to your little 60mm.
raymo
Last edited by raymo; 10-10-2019 at 12:44 PM.
Reason: more text
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