I'd like to have a go at one with say four stacked frames taken with different ISO and exposure rates.
This will capture bright detail as well as fine detail in the trap without overexposing the cetre region.
I may have darken the back ground too much Bert....but I like it better this way for widefield.
Thanks for letting me have a go...great image...too bad we have to crop and Jpeg compress so much to post on the forums...it really shows in widefield shots.
Gee Barnards Loop in 10 seconds, even SBIG users will salivate at that! The Digital Quantum Efficiency of the 5D's sensor must be well above earlier DSLRs
Scott
Gee Barnards Loop in 10 seconds, even SBIG users will salivate at that! The Digital Quantum Efficiency of the 5D's sensor must be well above earlier DSLRs
Scott
I am still stunned Scott at the performance of this camera, and even more stunned with the depth and breadth of knowledge in this forum. I took a chance on the performance of this camera purely on its noise performance. The 20D while being a very good terrestial camera was stopping me from doing what I wanted to do, ie take pictures and show them as they would look if the sky was much brighter.
This has been a well worthwhile purchase as I am slowly finding out.
Here is my attempt, gradient correction was a real pain as I was loosing the impact of the LMC bar. As an experiement I ended up having to use Berts 300mm FL image to help correct the background gradient - see attached. There are some nice tricks in IRIS that I employed to do this that allowed me to stretch and rotate a previously processed 300mm FL image onto the 80ED image and then take a difference in backgrounds between them. Its still not great, and there are some residual gradients that need to be removed.
My 2cents!...regarding the sensitivity of the modded 5D the big improvements over say the 300D/350D/10D/20D cameras I would say are due to the larger pixels. Compared to the 20D/350D the pixel area is over 60% greater which translates to a 60% increase in sensitivity, given that the technology is problably the same. The noise levels are extremely low in the 20D/350D/5D and up to 3x lower than the 300D/10D in shorter exposures. You can see this in my modified 300D comparision images of Orion especially the shorter exposures (although the difference diminishes with increased exposure as noise sky fog starts to be the limiting factor).
Re: Barnards loop in 10seconds...actually if you really contrast stretch the modified 300D will start to record Barnards loop in 10 seconds - just need to use a fast lens. See attached image which is 10 seconds @ f2 and ISO1600.
I have just uploaded a modified 300D shot of Orion, processed identically to Berts 5D shot. Field of view, ISO and focal ratio where the same as his shot - the important DIFFERENCE is the exposure is 3x longer for the 300D!
Heres my version of your Eta Carinae. Pretty basic processing, basically gradient correction and exagerated the red channel a little (because thats the way we like our nebula ) The exif seems to have been lost from the jpeg, so I don't know what the exposure, ISO is. There is a bigger version at:
Wow! what can one say the 5D is a lovely piece of gear! I'm sure your going to
have endless fun with it. I think the big astro camera guys are not in a league
of their own anymore, especially when you see these new digitals gaining on them.
They have certainly turned my head and my thoughts on where I'll go get a decent
astro camera. I wonder if they plan on making a mono in the future.
Heres my version of your Eta Carinae. Pretty basic processing, basically gradient correction and exagerated the red channel a little (because thats the way we like our nebula ) The exif seems to have been lost from the jpeg, so I don't know what the exposure, ISO is. There is a bigger version at:
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