This is the second comparison video I've made using the Celestron C90 and the Skywatcher Skymax 127. This time the target is Mars, and we'll look to see if the larger aperture translates into better image definition on the red planet. The set-up I've used is the same for each OTA. HEQ5 Pro mount, 2x TV barlow, ZWO ADC and ZWO ASI-120MC camera. In post processing i have used AutoStakkert to stack the best 25% of frames, with the app placing the alignment points (APs). Then the same set of wavelet filters have been applied in Registax.

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