Carina at High Dynamic Range

[avandonk]

There are a couple of other threads on high dynamic range images. I thought I would start another. Look at the image first!

Large image 3.0MB
http://members.optusnet.com.au/~avandonk2/Ehdr_car2.jpg

Details later still typing up in word as it is too long to lose!

Bert

[rogerg (Roger)]

Bert,

I much prefer this one to the other 2 HDR images, but am still not sure if I actually prefer the original ("normal way"). To be honest, I've found the other 2 look almost un-natural due to the lack of star brightness and hiding of the fainter background dust clouds running through the Milky Way.

I think this is more balanced in that respect. The original non-HDR does still show more background dust though, and I think has slightly better colour balance than this one where everything is slightly red.

I do like that the central core isn't burnt out, and those very bright stars aren't burnt out. But I also like seeing all those millions of surrounding stars showing up nicely, and those typical threads of dust running through the Milky Way.

My 2 c worth.

Roger.

[ving (David)]

that 3mb one is brilliant bert!!!
I noticed that some of teh brighter stars have "black eyes" (or red in some cases) on them. would loreal help on that do you think?

http://www.astrosurf.com/hfosaf/uk/tdownload.htm#loreal

[avandonk]

You are correct Roger. This is very early days. I have figured out how to use ImagesPlus for correcting for flats and then digitally develop each set (ie 1,2,4,8 minutes) and then use Registar to produce a set of exactly aligned images for each set to then use as input into EasyHDR.
This image is from only two sets and as you have already commented an improvement on previous images from one set. You can lower the saturation if you like. This image is the result of only adjusting levels in PhotoShop of two images averaged with RegiStar from each set. There are so many variables it makes my mind boggle.

What is really important the stars even the bright ones are not as saturated and if you could tell me which star is a G2V (joke) i will adjust accordingly.

Bert

[Striker (Tony)]

I like it Bert.

Yes there is positives and negatives but overall you have to say it's a step in the right direction.

Well done

[avandonk]

Look folks the dimmest stars come from the brightest image as does the the faint nebulae. The bright stars come from the dim images. This is the whole point. Have you ever seen an astro image this wide where all the stars have colour!

Bert

[ving (David)]

now dont go getting angry bert

no i havent, to answer your question... I love the pic

[avandonk]

Ving I am not angry. Just because other peoples cameras are not as well used as mine. The simple fact is the Canon 5DH has 14.3 stops of dynamic range. This is also a way of saying signal to noise is very good. But it is not enough as I really like pushing things. So hence the current thread.

Bert

[avandonk]

By the way if you click on the icon at the lower right, the full image is about 1.2 meters wide! This is true for most standard monitors.

You are now really pixel peeping!

Bert