![]() On an unrealistically high-resolution sensor, the f5.6, f/7.1 zooms and the 800mm f/11 would all have the same resolution and outresolve the 600mm f/11, and the TCs would not increase resolution.The summary based on just the effects of diffraction and sensor Mpx, and ignoring optical aberrations is: What I do here is to calculate the contributions of diffraction and sensor Mpx size (R5 vs R6) to the resolving power of the 400mm f/5.6 and 500mm f/7.1 zooms and the 600mm and 800mm f/11 primes and how resolution is affected by 1.4x and 2x teleconverters. Another of my geek articles, which does have some implications for actual use. If you see any problems with this telescope calculator tool, or any of our interactive tools, please send an email to. Here is an analysis of your telescope's performance using the parameters selected above: Scope Calculator v1.0 Telescope aperture = ![]() For example, a 1st-magnitude star is 100 times brighter than a 6th-magnitude star. The higher the magnitude, the fainter the star.
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