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M81 | |
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(Click on image for Full Resolution)
(Click here for my Vixen 102mm/ST-8E version taken on 03/06/2002)
(Click here for my Vixen/ST-237A version taken on 02/16/2002)
| Date: | March 5, 2005 |
| Exposure: | LRGB 180:165:150:135 : 36 x 300s L, 11 x 900s R, 10 x 900s G, 9 x 900s B |
| Processing: | CCDSoftV5 for image acquisition. MaxIm for image calibration,(5 each RGB flats, bias subtracted and median combined, 60 bias frames median combined, 20-900s darks Sigma Reject combined), alignment, normalization, stretch, and RGB combine. 3 iterations of CCDSharp on the Luminance layer. PixInsight LE for backgound normalization, Photoshop CS for RGB processing,final adjustment and jpg conversion. |
| Conditions: | Average |
| Scope: | C14 @ f/7 |
| Camera: | SBIG ST-10XME/CFW-8A, -15° |
| Comments: | This was collected over several nights with varying seeing conditions. I was testing a mirror locking device to see how the scope would hold collimation. Guided with the internal chip as there is just too much flexure between the C14 and the Vixen guidescope. Pyxis rotator used with meridian flip to keep all the images oriented in the same direction. |