M101, a year apart.

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M101, a year apart.

Postby AndyBooth » Wed Apr 22, 2020 10:41 am

My first deep sky through the C11.
I am used to imaging at 1200mm or at most 1600mm.
With my 0.75x reducer on the C11, I am now at 2100mm, and that is certainly challenging
On the polar alignment and tracking front.
My stars are a little trailed.

Anyway, here is M101 attempt.

C11 Edge with Revelation 0.75x reducer, QHY10, AZ EQ6 GT
Guided with 60/285 finder, PHD2 and Altair GPCAM2 AR0130 with Baader fringe filter.
39 x 600 secs , darks and flats.
Taken with ATP, calibrated and stacked in nebulosity, processed in Startools.

As a note, as the focal reducer is made for a flat field RC type scope, it handles the flat field of the edge very well
considering the price compared to the Celestron. Only cost me around £60!

In comparison, here also is my only previous attempt at this object, a year ago.

I find StarTools unbelievable in terms of extracting data from noise and producing a mighty fine image from a very average
CB9ACA0E-885E-4795-AEEB-7DC3BFBB562F.jpeg (48.43 KiB) Viewed 1045 times
1337064A-4237-4D50-B45A-E53203A9D5D4.jpeg (264.57 KiB) Viewed 1045 times
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Re: M101, a year apart.

Postby alacant » Thu Apr 23, 2020 10:59 am

Amazing detail and soooo close.
I get the jitters when our 10" Newtonian @ 1200mm is out. 2100mm would have me running fast in the opposite direction!
Well done indeed and yeah, nothing comes close to StarTools' ability of distinguishing good stuff from noise. Or is it magic?
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Re: M101, a year apart.

Postby emarko » Fri Apr 24, 2020 11:21 am

Great progress ......
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