Hoya R72 Filter Arrived Today...Now seeking some advice!

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n30_mkii

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My main question is regarding exposure times.

I have a D80 which has an aggresive IR filter, and so i'm expecting to need some long exposure times in order to get any decent shots.

Is there any way of working out how long to leave the shutter open for? Anyone else with a D80 who does IR to give their findings? I prosume it's a hit and miss affair, checking the histogram after the shot to check for a 'correct' exposure?

The second part of the question is regarding PP of the shots. Are there any good tutorials related to the whole IR workflow.

Any help is appreciated as always!
 
I use the 'take shot, check histogram and reshoot' method. After a while you'll learn to guess what the exposure required is. Normally you're looking at 30seconds - 2minutes (with my D40X, which has the same filter afaik). Another method though is to crank up the ISO to full, open the lens wide, and take a short (or shorter anyway) exposure, then work out what the correct exposure at say ISO 100 f10 is.:)
 
Thanks MK, do you have a good workflow or one that you stick to?
 
Haven't done any IR stuff for ages but the 20D I have also needs long exposures, 2 mins at F8 isn't unusual. Not a great deal of help I know.
 
n30_mkii said:
Thanks MK, do you have a good workflow or one that you stick to?
Click to expand...

I haven't done any for ages, but I tend to;

Shoot as low ISO as possible (Noise can be a real problem with IR I find.)
Take a custom white balance with the IR filter on as it makes it easier to check the shot in camera.
Once you have the shot, flip the red and blue channels.
Play with the levels.
Slectively desaturate certain areas.

Thats about it really. Fstop11 is your man to see about IR. :)
 
Thanks for the feedback yet again. Indeed Fstop has some nice IR images. Will drop him an email and see if he can share his workflows;)
 
I too use the shoot 'n' check method which has yielded nice results. Might look into getting a 350D converted to IR. Anyone know what costs are involved?
 
Messiah Khan said:
I haven't done any for ages, but I tend to;

Shoot as low ISO as possible (Noise can be a real problem with IR I find.)
Click to expand...

Would that be something to do with the length of the exposure and not specifically IR?

I two minute exposure could start to get noisy, although I wouldn't have thought noisy enough to be that noticeable.:thinking:
 
I imagine it 'is' to do with the long exposures, as you tend to get some noise when doing long exposures generally anyway
 
Yeah, its a combination of the long exposure, as well as my processing techniques. I often try and push the sky as close to black as I can which can result in the noise being even more evident.
 
Hmmm! Exposures guessed at and looooong. Not my 'cup of tea'. I would have bought myself a digital modified to take IR! Result? Hand-held exposures in IR. (Lazy me!)

Instead I bought a digital modded so I can shoot IR, UV or full spectrum. (Not so lazy me!)
 
Would be nice to have a modded camera for sure, but i'm only starting out and can't warrent that atm!
 
I know what you mean. I agonised over this for ages until my wife said I could have it as a joint birthday and Xmas pressie! You could buy a 2nd-hand camera (or your back-up) and have it modded to IR only for approx USD300 (about £160?) plus postage. No need for expensive filters, hand-held exposures. If you go for a non-DSLR with an electronic viewfinder you can walk around and see the world in IR - weird and addictive!

Should also say - when they take out the IR blocking filter they also remove the manufacturers blur filter (put in to help reduce moire patterns) so you actually get sharper pics. Trade-off is greater possibility of moire but many landscape togs regularly have this removed anyway as not so much a prob in l/scapes. Worth it imo.
 
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