Silver Sliver Galaxy (NGC 891, Caldwell 23)
My cooled camera is still for a check at the dealer, so "playing" with my non-cooled Zwo ASI385MC planetary camera. Had a go at NGC 891 and considering the camera, I really like the result, despite being it a bit grainy and "color blobbed".
And again (or like usual) amazed by the Ioptron CEM25EC mount: this is 120 seconds non-guided with a focal length of 1440 mm, making my scope around f/7 with the reducer.
Have to keep an eye on it since the tracking rate at the zenith is different then, lets say, 70 degrees. I have to manually adjust the sidereal tracking then but for me that's part of the whole fun experience smile.gif
The Silver Sliver Galaxy (NGC 891, Caldwell 23) is an edge-on, unbarred spiral galaxy in Andromeda. It's at 30 million light years distance and has a radius of 60,000 light years, making it bigger then the Milkyway which as a radius of 53,000 light years.
It has an apparent size of 13′.5 × 2′.5 and has a apparent mag of 10,5.
The Netherlands, Bortle 7/8
Meade LX200 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Optolong L-Pro filter
Optec Lepus Standard 0.62x reducer
Zwo ASI385MC planetary camera
Captured with SharpCap Pro
115 x 120 sec / Gain 120 / Offset 15 / White balance R50/B50
Stacked in DeepSkyStacker
105 lights / 25 darks / 100 flats / 100 darkflats
Processed in Photoshop
Levels, curves, color adjustment, reduce noise, contrast enhancement.
Silver Sliver Galaxy NGC 891
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Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
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Re: Silver Sliver Galaxy NGC 891
Nice, clear image- Menno. And 120s subs with no guiding. That is impressive. I can't get that on my AP1100 mount unless I build a point model.
Re: Silver Sliver Galaxy NGC 891
Thanks Bruce!
And yes, the mount rocks. With the cooled camera which gives a bigger FOV, I can go easily go to 3 minutes. I tried 5 minutes and that even worked but is of no use due to Bortle 7/8
And yes, the mount rocks. With the cooled camera which gives a bigger FOV, I can go easily go to 3 minutes. I tried 5 minutes and that even worked but is of no use due to Bortle 7/8