M51 on SCA310/3.8

 Posted: Jun 16th, 2026
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Technical Info
Telescope/Lens: Sharpstar SCA310/3.8
Camera: ZWO ASI2400MC Pro
Mount: ФА-40
Guide Scope: ZWO OAG-L
Guide Camera: ZWO ASI174MM Mini
Software: Pixinsight
Exposure:
65 x 300" ISO/Gain: 140 - Antlia Quadband
Orange, Bortle 6 zone:
 Moscow, Russia
 Jun 11th, 2026
5 h 25 m
166
Resolution: 2984x2548 px
Scale: 940 KB

First light of the new Sharpstar SCA310/3.8
Sorry about the background — it turned out poorly due to several factors: no flats, shooting on different days at different angles with a gradient from local light pollution, since the instrument was still being adjusted and a full image wasn't planned.
I stacked all the test frames that weren't completely terrible in terms of FWHM, threw away the rest, and had to crop out 50% of the frame area.
In short, just look at the object if you're interested.
Compared to my previous SCA260/5, this one at least has a point, and the level of spherical aberration doesn't seem shocking :)

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Comments

Normal tube, congratulations!!!!
Try stacking the same frames with drizzle 2, it should be better in resolution.
18 Jun, 2026 Reply
Anth Replied to Oleg Novoselov
Thank you, Oleg.
I always stack the sums with it, but this time Pix gave an error about being unable to drizzling during stacking.
I haven't looked into the reasons in detail yet — the frames are mostly unusable anyway and need to be properly re-shot.
18 Jun, 2026 Reply

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