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.
![](https://i0.wp.com/www.drogenberg.be/wp-content/uploads/2021/05/M66_MAK_F15-mod-St-V1.jpg?resize=525%2C481&ssl=1)
Compared to what my C11 did with an ASI183mm RGB last year:
![](https://i0.wp.com/www.drogenberg.be/wp-content/uploads/2020/04/M66_C11_RGB_ASI183_46x120s_G111.jpg?resize=525%2C368&ssl=1)
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