This one didn't come out as well as I had hoped after collecting 38 x 5min subs at 1600iso. Maybe the low altitude angle didn't help, I know my guiding graph was a bit up and down as well perhaps due to the seeing.
After integrating with darks, flats and bias, the image was basically bright red right across the image with whiteish parts of the galaxy visible. I am not sure why this was the case? I did have a red head torch on as usual but don't recall ever shining it into the scope. After DBE most of the red was gone but I was still left with a faint but very visible red blotches/mist throughout the image background. I tried Background Neutralisation and Colour Calibration but not much effect. I also did ACDNR after stretching but not sure this helped that much either.
well i would like to see a good one if you were not happy with this brett!
i think it is very good....... you have a better angle of attack than in perth though
i like it
pat
Wow Brett, don't be so hard on yourself mate, I think this is a great image. M33 has a very low surface brightness, and you have captured quite a bit of detail. I would be very happy to produce one this good.
A good result, Brett! That low down you'll find that atmospheric extinction messes up the colours a lot (you'll lose a lot of blue for a start). I did an image of M31 at altitudes between 10 and 14 degrees and it took a lot of work to make the colour look halfway reasonable...
Thanks guys for the encouragement and advice, my inexperience with this means I really have no idea what to expect from different targets and circumstances so it is hard to judge my own results.
Hi Brett, great image!
I have found that light from a red headlamp near the camera viewfinder will give a red area on the picture. Canon warns of this in the manual for my 60da in the Bulb photography section. There is a small rubber sleeve attached to the camera carrying strap that is for sliding over the viewfinder during prolonged exposure when stray light may enter the viewfinder. Normally it is not noticeable, as we shoot prolonged exposures in the dark. Don't know if that affects your camera but worth considering.
John
John, that is an interesting point mate that I had not considered. I do look over my scope with my head torch throughout the night to make sure everything is looking solid and cables are not snagging etc.
With a DSLR there is a possibility that light from my headtorch is entering via the viewfinder and reaching the sensor. I will have to remember to close the shutter over the viewfinder in future.
