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Ok Im probably realistically going Esprit 100ED or 120ED.
I really am trying to now understand how to compare the 100ED to the 120ED, as they both have different apertures and different f numbers.
While the 100ED is faster at f/5.5, the 120ED has a larger aperture but its f/7.
Of course if both scopes had the same aperture this would be easy but hunting for a formula is not as easy as you would think.. Id like to boil these down to a comparable unit of measure, like photons per second or similar (for the same sensor & target).
Given Mono is down the track.. im sticking with a mirrorless for now, the time it takes to capture the image is a concern given the longer exposure time, the more noise.. want to keep the SNR down. If only i could boil these 2 scopes down to comparable units.
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