IR Woes, and Dohs

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Birma
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IR Woes, and Dohs

Unread postby Birma » Tue May 25, 2010 6:46 pm

What is the opposite of a "eureka" moment?

Perhaps when you realise you are doing something completely wrong. All of the planets had aligned to provide what should have been a perfect photography opportunity for me at the weekend. I had a new uwa lens to try out (Tamron 11-18), the trees and other vegetation are very green, it was hot, sunny and bright, and I had a one hour pass to "go and play with my toys" - all perfect to try and grab an IR shot or three. Found a good location; very green trees, big historic building, blue sky, and a river. I carefully took some shots with the IR filter in place. Excitedly I took these home but, when reviewing on the computer, it dawned on me I was getting no IR effect, just very red images. Doh, and double doh! (I think the Doc suggested that this was happening with my last supposed IR picture.)

A google based investigation has ensued. I think where I am going wrong is white balance. It seems that you need a very low WB value for those "everything green is bright white" shots. It would also seem after reading other sites (one of them a Canon forum, sorry Doc 8) ) that I should have made a custom WB shot (with IR filter in place) of well sun-lit green grass and then used this custome WB setting for my subsequent shots.

Would any of the IR Jedi here care to share a view?
Nex 5, Nex 6 (IR), A7M2, A99 and a bunch of lenses.

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Dr. Harout
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Re: IR Woes, and Dohs

Unread postby Dr. Harout » Tue May 25, 2010 11:23 pm

Armen loves to process IR shots in color. I am more conservative. I always process them in B&W.
I tried with colors, but somehow don't like it.
If you care to know anyway, I'll ask Armen to explain step-by-step processing in color.
A99 + a7rII + Sony, Zeiss, Minolta, Rokinon and M42 lenses

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Birma
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Re: IR Woes, and Dohs

Unread postby Birma » Wed May 26, 2010 9:04 am

Hi Doc - any advice would be welcome. When you process them in B&W do you have to do anything with the WB setting before hand?
Nex 5, Nex 6 (IR), A7M2, A99 and a bunch of lenses.

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Dr. Harout
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Re: IR Woes, and Dohs

Unread postby Dr. Harout » Wed May 26, 2010 9:02 pm

Just convert to Grayscale in ACR, or try to play with Hue/Saturation/Luminance.
A99 + a7rII + Sony, Zeiss, Minolta, Rokinon and M42 lenses

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Birma
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Re: IR Woes, and Dohs

Unread postby Birma » Sat May 29, 2010 11:19 pm

Here are some attempts. I have added the sepia tone. All with A700 + Tamron 11-18 + Cokin 007 IR Filter

Image

Image

Image
Nex 5, Nex 6 (IR), A7M2, A99 and a bunch of lenses.

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Dr. Harout
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Re: IR Woes, and Dohs

Unread postby Dr. Harout » Sat May 29, 2010 11:46 pm

A great start, Birma.
A99 + a7rII + Sony, Zeiss, Minolta, Rokinon and M42 lenses

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Dusty
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Re: IR Woes, and Dohs

Unread postby Dusty » Tue Jun 08, 2010 5:41 pm

Make them a bit darker and add some evil music, and you've got the start of a good thriller!

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Birma
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Re: IR Woes, and Dohs

Unread postby Birma » Tue Jun 08, 2010 6:02 pm

Hehehe - good point Dusty - I suppose they do look a bit gothic.

Still waiting for more clear, hot days for furthert IR experiments - it has been too cloudy recently, and now we have rain :(.
Nex 5, Nex 6 (IR), A7M2, A99 and a bunch of lenses.


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