Tried out the in camera noise reduction of the 20D
4X330 sec ISO 1600,Hutech Nebula filter, stacked JPGs! in Registar, adjusted in Photoshop.
Image Gone
Too tired to say more.
Here are two more images essentially from the same data
300mm F2.8,5x330sec ISO 1600,Hutech Nebula Filter,in camera noise reduction ON.
LMC_RAW.jpg
RAW to Tiff ,applied Noiseware Professional to Tiffs,stacked in Registar
Adjusted in Photoshop.again applied Noiseware Professional to the result
http://users.bigpond.net.au/avandonk/LMC_RAW.jpg
LMC_JPG.jpg
Used out of camera JPG's,applied Noiseware Professional to JPG's,stacked in Registar,Adjusted in Photoshop.again applied Noiseware Professional to the result
http://users.bigpond.net.au/avandonk/LMC_JPG.jpg
I think the Raw frames give a better image of weak nebulosity than the JPG frames. I tried to keep all image manipulation the same for RAW and JPG.
The only drawback of this method is that it takes twice as long to collect a frame, as the camera takes a dark frame for each exposure and subtracts it in camera.But it saves noise subtraction in Photoshop.The camera does a far better job of removing noise than photoshop.There are far less artefacts ie 'dark holes',in fact almost not noticeable.
Bert
