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Infrared Processing Info

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by Rocky Sharwell on Tue Feb 19, 2019 3:21 pm

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I am looking for a book, ebook, or website with information about IR processing-especially color processing. About to send off my A7RII for IR conversion. Thanks for any information...

Rocky Sharwell

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by SantaFeJoe on Tue Feb 19, 2019 3:42 pm

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You might check these out:

https://www.lifepixel.com/topics/photo-tutorials

https://www.lifepixel.com/photo-tutorials/infrared-photoshop-basics

https://kolarivision.com/turorials/

https://maxmax.com/false_color_ir.htm

Or Google this:

infrared photography processing

Joe

Learn the rules like a pro, so you can break them like an artist. -Pablo Picasso

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by E.J. Peiker on Tue Feb 19, 2019 5:17 pm

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Rocky,

The links Joe provided are very valuable. In my experience the biggest things to learn are:
1. How to White Balance both in camera and in your processing flow (note that Adobe Raw processors, ACR and LR, are not capable of white balancing IR photos, most others are)
2. Channel swapping the blue and red channel
3. Learning how to use Selective Color in PS

E.J. Peiker http://www.EJPhoto.com
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by Rocky Sharwell on Thu Feb 21, 2019 9:07 am

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Thanks - this information made me realize that I need to think a bit more to make sure of what I want before sending off the camera. I've ordered an actual paper book from Amazon as that is how I learn best.

Rocky Sharwell

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by E.J. Peiker on Thu Feb 21, 2019 9:37 am

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If you are specifically wanting to do color IR than a 665nm or lower conversion is what you want - 665 and 560 are popular. You can still do B&W although not as much of the ultra high contrast B&W but you can simulate it in post.
If B&W is what you are aiming for than a 700+ conversion is what you want with higher levels of contrast the higher you go. 720 and 830 are popular.

My personal preference is 665 as it allows you to do color if you want and still lets you do fairly high contrast B&W. On a camera intended for B&W I prefer 720 to 830 as it gives me more tonal flexibility.

E.J. Peiker http://www.EJPhoto.com
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by SantaFeJoe on Thu Feb 21, 2019 10:00 am

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If you go with the lower ranges, then you can add a higher, e.g. 830nm, filter and have the best of both worlds. The advantage of mirrorless is that you get to see what you’re looking at with a filter placed in front of the lens. (That doesn’t work on a DSLR.) You cannot go the other way, i.e. 830nm to 560nm. You might call Lifepixel to confirm. IR filters are not inexpensive, but your options are greater using them. Full spectrum is another option using external filters.

https://www.lifepixel.com/infrared-phot ... ir-filters

https://www.lifepixel.com/infrared-phot ... -ir-filter

Joe

Learn the rules like a pro, so you can break them like an artist. -Pablo Picasso

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by E.J. Peiker on Thu Feb 21, 2019 10:59 am

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Very good point, other than losing a little bit of shutter speed adding something like an R72 to a 560 or 665 IR conversion turns it into a 720nm which is great for monochrome IR.

E.J. Peiker http://www.EJPhoto.com
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