[wayne anderson (Wayne)]

I have finally removed the very large Camera wobble from a Meade Field De-Rotator by replacing its ball bearings with slightly larger ones so from now on my imaging setup will be De-Rotated alt/az allowing longer exposures.

Before the setup change I managed to get 500 short subs in alt/az, No guiding of NGC 5128 so I stacked them and cropped and processed the image, it will be interesting later to compare this image with my next one with longer exposures.

This image seems to look totally different on every computer I have so I hope this looks OK.

Centaurus A Galaxy NGC 5128


300 x 20sec subs at iso 1600 with darks and bias

200 x 15sec subs at iso 1600 with darks and bias

12” Meade LX200 f6.3 (alt/az setup with No guiding)

Sony Nex-3 DSLR Camera

Processed with DSS,Startools,Gimp


The Last 2 images have 100 extra 25sec subs taken last year

Centaurus A Galaxy NGC 5128

100 x 25sec subs at iso 1600 with darks and bias
300 x 20sec subs at iso 1600 with darks and bias
200 x 15sec subs at iso 1600 with darks and bias

Link to higher res image below
http://www.astrobin.com/82705/