HDR Shots

Creed

Creed

Messages
341
Edit My Images
Yes
Just a really quick question rather than a debate on HDR

Obviously exposure bracketing will allow me to take three shots of the same scene at 3 different exposure levels... However, would a single RAW image contain the same information?



EDIT: can someone move this please I posted it in the wrong place :(
 
Well yes you can, but three or fore or five exposures will give you more to work with as you will be able to have exposures wider then you will get from one RAW file.
It will depend on the scene and the lighting levels that will decide how many different exposures you take.
Hope this help
 
Chaz Photos said:
Well yes you can, but three or fore or five exposures will give you more to work with as you will be able to have exposures wider then you will get from one RAW file.
It will depend on the scene and the lighting levels that will decide how many different exposures you take.
Hope this help
Click to expand...

What about exposure bracketing at +/-2 in RAW... just wondering how other people do it as I would like to give it a try on some shots, but there are times i would like to do it while hand holding the camera so can only get the one RAW shot
 
Creed said:
What about exposure bracketing at +/-2 in RAW... just wondering how other people do it as I would like to give it a try on some shots, but there are times i would like to do it while hand holding the camera so can only get the one RAW shot
Click to expand...

You need to take some spot reading of lightest to darkest to work out what you need have shots about one or two stops apart
 
Creed said:
fantastic thank you
Click to expand...


You're Welcome

For information, I have tried 5 images from 1 raw and the result was pretty ordinary. However I am no expert.
 
Creed said:
What about exposure bracketing at +/-2 in RAW... just wondering how other people do it as I would like to give it a try on some shots, but there are times i would like to do it while hand holding the camera so can only get the one RAW shot
Click to expand...

I hand hold 3 shot bursts at +2/0/-2 all the time, I cant remember the last time I actually used a tripod for some if im honest.

It's pretty easy, I mean nearly all camera's will be able to take them in under 1 sec so you just have to hold the camera still during the burst, the software then can align the slight errors afterwards.
 
With a camera like a D700 or D3, you can only span maybe 12 stops with a single exposure in 14 bit mode, and high contrast scenes (say an outdoors scene taken out through a window in a dark room, or a sunset with silhouetted objects in the foreground) can easily exceed this degree of latitude. That's the reason why you should take multiple RAW exposures and merge them into a single image before tone mapping them to compress the tonal range into an image that can be used as the basis for display or print. Probably 3 exposures with +/- 2.0 stops should suffice in most cases. I tend to take 5 with a +/- 1.5 stop increment.
 
Creed said:
Obviously exposure bracketing will allow me to take three shots of the same scene at 3 different exposure levels... However, would a single RAW image contain the same information?
Click to expand...
Put simply...if your trying to shoot a true high dynamic range scene (which is one with a greater range of shadow and highlight detail than the camera sensor is capable of recording) then no a single RAW is not capable of containing all the information.
 
Obviously try and keep the ISO as close to 100 as possible, but sometimes when creating HDR images it's possibly for them to become grainy during the processing stage. I usually overlay a HDR image over the original and use the eraser in photoshop to erase the parts of the image where HDR isn't required... if that makes sense.
 
so it shouldnt matter if i set it at 100? wasnt sure if different exposures would need different ISOs
 
Well, the lower the number the lower the noise generally. It all really depends on what you're shooting and the conditions you find yourself working with. If I'm doing an architectural HDR shot then I'll set it to 100 and put the camera on a tripod and shoot away. I'd keep the ISO the same.
 
ah, ok. at the moment, i have been doing it outside, in sunny/cloudy conditions...

got the tipod sorted :)
 
You must log in or register to reply here.
Back
Top