Eta Carina with SBig 2000XM 1st lightPosted By Jose Suro |
Hi Greg,
Nice first light. Welcome to the realm of filtered imaging. There is a lot of things to keep in mind when shooting with filters. First is the sensitivity of the chip to the different wavelengths. This results is different RGB ratios for every chip model. The ST2000's chip is very sensitive in the blue (or insensitive in the red - whichever) so you need to adjust the color mix. I used 2:1:1.5 RGB ratios with mine with good results.
If you throw H-alpha in the mix then every thing changes again. For a great tutorial on mixing H-alpha into your RGB images see here:
http://www.robgendlerastropics.com/HARGB.html
Lastly, you should use dark frames and build a library of the most common exposures. At least 10 darks should be combined into a master dark or you end up adding more noise to the image. This all requires you keep the temperature constant as well.
Best,
Jose Suro
Tierra Verde, Florida
Nice first light. Welcome to the realm of filtered imaging. There is a lot of things to keep in mind when shooting with filters. First is the sensitivity of the chip to the different wavelengths. This results is different RGB ratios for every chip model. The ST2000's chip is very sensitive in the blue (or insensitive in the red - whichever) so you need to adjust the color mix. I used 2:1:1.5 RGB ratios with mine with good results.
If you throw H-alpha in the mix then every thing changes again. For a great tutorial on mixing H-alpha into your RGB images see here:
http://www.robgendlerastropics.com/HARGB.html
Lastly, you should use dark frames and build a library of the most common exposures. At least 10 darks should be combined into a master dark or you end up adding more noise to the image. This all requires you keep the temperature constant as well.
Best,
Jose Suro
Tierra Verde, Florida
. It's great to be back! I started working on the color and should have something very soon.