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Old 03-05-2009, 02:25 AM
TrevorW
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TrevorW is offline
 
Join Date: Aug 2006
Location: Western Australia
Posts: 8,286
First light GSO 8" RC

Collimation may be a bit out even though it was checked on the bench at the retailers, it didn't appear to be perfect when viewing a star out of focus.

Spent a good hour on DSLR Focus in and out trying to get perfect focus fiddled with the collimation although its years since I've collimated a reflector.

The scope is way back heavy I tried balancing it on a side by side saddle with my ED80 but I could not get it too balance on my home made saddle, I'll probably need a fully adjustable one for this arrangement to work. Took the saddle off and just had scope on mount and nearly got it to balance although not perfect.

Both images are less than 10 minute total exposure, unguided and uncropped

Had to use my 80mm extension tube in the focuser with the Canon 350d to attain focus

No filter used for these all taken under waxing gibbous moon 58%

1. NGC5139 30 frames x 20 seconds per frame no darks, flats applied stacked in DSS best 19 frames selected by DSS for stacking, Aligned RGB in DSS, adjusted for curves, levels and colour balance nn PS7, NC's light pollution action applied and RC Gradient Xterm.

2. M5 30 frames x 20 seconds best 22 frames stacked by DSS darks and flats applied adjusted for curves and levels in PS7

Once I have the balance and guiding issues sorted should be a good scope to image with and my feeble first attempt probably doesn't do it justice.

Attached Thumbnails
Click for full-size image (ngc5139 10min iis.jpg)
100.4 KB126 views
Click for full-size image (m5 22 frames 7 minutes iis.jpg)
93.6 KB93 views

Last edited by TrevorW; 03-05-2009 at 02:37 AM.
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