Using the F/15 Maksutov as an astrograph

The F/15, 2700mm focal length 18cm aperture Maksutov is never intended to capture deep-sky images. Instead it excell’s at planets and the Moon.

However, with this focal length, it makes sense to give it a try at small objects like galaxies.

This is what came out of it, as a test, stacking 40 subs of 300s at gain 0. That’s 3 hours and 20 minutes. The detail is ok, what I noticed are triangular stars so I need to take a look at the collimation, seems to tight.

M66, Maksutov 180mm F/15 43x300s ASI2600MC

Compared to what my C11 did with an ASI183mm RGB last year:

M66, C11 F10 46x120s at G111 ASI183mm RGB