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General Photography Technique Discussion on General Photography Technique

IR on the CHEAP

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  #121  
Old 21-07-09, 11:30
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andy153 andy153 is offline  
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Hi Don and any others following this thread, All my cards are Sandisk Extreme III's, sizes vary from 2 -16 Gb. I use 2x 16 Gb in the D3, a 12 Gb in the D700, and an 8Gb in the D100 IR. Card Download seems to depend upon Camera Model and card size - I Download twice - Once with NX2 - this provides my backup store to an External Firewire Drive. Then I download everything into Aperture for sorting etc. D3 and D700 download in both applications in seconds. D100 is slower in both but now it's not by much - Aperture is slower than NX2 on all cameras.

Now a bit about WB. D100 is set to custom white balance - taken from grass. I have posted two Pics in the Gallery called "What am I ...?"

http://www.worldphotographyforum.com...31&ppuser=2724

And "What am I Original"

http://www.worldphotographyforum.com...53&ppuser=2724

The Original has only been resized. In my opinion it looks very much like the scene in colour - It shows there is not a lot of IR about under the pier to affect the IR sensor of the camera. The next job will be to try different WB's on shots. Green for custom on landscape, perhaps a different custom WB for other types of shots. Perhaps Blue or sand colours for beach and seascapes?
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  #122  
Old 25-07-09, 20:40
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Don Hoey Don Hoey is offline  
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Quote:
Originally Posted by andy153 View Post
........ All my cards are Sandisk Extreme III's, sizes vary from 2 -16 Gb. I use 2x 16 Gb in the D3, a 12 Gb in the D700, and an 8Gb in the D100 IR.


Just goes to show Andy. Probably the most I take in a single session is equal to three rolls of film. Maybe 4 if its a really good event.

Various WB experiments on the IR front will certainly be interesting.

Don
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  #123  
Old 30-07-09, 15:58
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Default A different method for false colour

The atteached pic was processed in a different manner from the norm and results can vary greatly for different manufacturers.

For this image I used my normal "custom white balance" i.e. photographing grass.

The following is my work flow for this image.

Auto Levels.
Create new layer.
Invert colour.
Blend mode colour.
Adjust Hue/Sat to give a suitable colouring. Next on this image selected the resulting pinkish foilage, moved the Hue slider over to the blue range, effectively changing the pinkish hue to green. This gave me unwanted greenery in the foreground which was a little patchy, so use the desaturation brush to remove the colouring from the foreground.

I then used a filter that I particulally like for old buildings, this being "Poster Edges" with the following settings 4-1-4. This totally ruins the image so then I go to "Edit>>Fade" usually with a soft light blend mode.

Smart Sharpen.

Harry
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File Type: jpg False Colour IRsmall.jpg (194.6 KB, 9 views)
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  #124  
Old 30-07-09, 17:24
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Well that is well different Harry.

Sorry I have not been playing with IR recently as a bit busy on other things, but I am keeping track of whats happening.

Don
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  #125  
Old 08-08-09, 19:14
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Hi there all IR fans, just a further tip - I've been experimenting with Custom White Balance and have found a setting I think improves it - certainly in bright sunlight and with a D100. I do the normal set by pointing at very green grass and then dial in -2 exposure bias. This seems to bring out detail in the areas that would go very white, and gives a better overall balance. For information - my gallery posts - Menai Panorama and Contemplating the Straits also had a full strength Cokin P Graduated ND filter on.
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