HDR, JPG, RAW comparisons

[superdiver]

I am new to HDR so forgive me if this has been dealt with adnausium before....

I wanted to compare differnt formats and the results when run through photomatrix. I dont kow if I understand this correctly or not, but I figured that by combining 3 photos there would be alot of info. I wondered if by having much more info the picture quality might be similar as opposed to using one picture....does that make sense....maybe if you see what I did it will...

Used the deck railing for a tripod, used my 24-105 L IS with the IS on, Used the exact same sequence and settings in photmatrix for all three photos. Shot in Av, tghe only changes to the camera I made were the ISO and the picture quality settings.

1. I took this one at ISO 3200, jpg S (the lowest quality setting on my 30D)
http://superdiver.smugmug.com/photos/184105132-L.jpg

2. This one I took at ISO 800, jpg L,
http://superdiver.smugmug.com/photos/184105896-L.jpg

3. This one at ISO 100, RAW
http://superdiver.smugmug.com/photos/184106737-L.jpg

So what do you think of my experiment and does it make sense what I was trying to do?

[azpix]

So what do you think of my experiment and does it make sense what I was trying to do?

??? Sorry, i don 't get what your trying to do?

[mkuriger]

photomatix is used for combining several images taken at different exposure levels. I don't see what you did here besides demonstrate that high ISO settings introduce noise. you don't need photomatix to do that.

[mkuriger]

example of photomatix image, using 6 exposures.

http://isuzu-mods.com/pics/misc-061_2_3_4_5_6_tonemapped.jpg

[superdiver]

What I was trying to do is see how much the noise was effected by combining multiple high noise photos as compared to photos with out so much noise, and then comparing them, does that make more sense?

I wanted to see if there would be less noise and better image quality.

[superdiver]

example of photomatix image, using 6 exposures.




How do you do that? by manually setting the exposure levels between +2 and -2 ec? So if thats what you do, then you reach a maximum of 12 exposures if you have your camera set to use 1/3 increments?

[TheGlyph]

So if thats what you do, then you reach a maximum of 12 exposures if you have your camera set to use 1/3 increments?


You can also change exposure by using different shutter speed and Fstop settings. You are not specifically limited to the +- exposure on your camera. Do be careful that you don't change the image too much though, as it may cause problems depending on what your doing (depth of focus and such).

[superdiver]

Stacking is different then this though, right?