[Radiance-general] Digital Camera recommendations?

[Despina Michael]

Hi Rob,

I have create a couple of HDR probes lately and I can tell you what settings 
I have used.

First of all, the sequence of photos that you have to take must be perfectly 
alighned.
The only way that works for me to do that, is to place the camera on a 
tripod and take photos remotely (that is connect the camera with a computer 
and use remotly capturing pressing a key on the keyboard - camera's software 
should have the appropriate software for that - but good cameras usually do 
have)

I don't think so, auto bracketing is a good idea. Most cameras can take 
about 3 (or 5) photos with Auto Bracketing but you need more in order to 
create an HDR Probe (about10-15 photos)

In order to take the photos set aperture at a fix value and change only 
exposure time in order to change the overall exposure.
You also have to set your camera at no flash.

You should  take a sequence of photos (about 10-15) with different exposure 
times, changing 1 f-stop each time, starting with bigger exposure.
Before begin to take your photos, take one photo using auto-focus in order 
camera focus on the mirrored ball. Then set manual-focus and don't change 
focusing (that is in order to have all photos with same "focus value")

If you planning ton use hdrgen for generating HDR probe, I recommned you to 
disable alignment algorithm. At least in my case, when alignment was enable 
hdrgen gave worst results.

I hope it helps,
Regards,
Despina



----- Original Message ----- 
From: "Fitzsimmons, Rob" <Rob.Fitzsimmons at Summit.Fiserv.com>
To: <Radiance-general at radiance-online.org>
Sent: Wednesday, March 09, 2005 3:53 AM
Subject: [Radiance-general] Digital Camera recommendations?


>I think this may have been discussed, but I can't find the threads...
> Does anyone have camera recommendations for creating HDR Probes?
>
> Something that has manual override, shutter / aperture priority for
> bracketing
> Auto bracketing?
> Anyone guessing on when digital cameras will be taking native HDR picures?
> Don't think I can wait that long
>
> My budget is $500
>
> Thanks,
> Rob Fitzsimmons
>
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