r/infraredphotography

Hello everyone,

I hope this is the right place for this question (instead of r/rawtherapee), which may or may not be simple:

What is the reason for these image artifacts in Rawtherapee that you can see around the petals and all over the canopy? I took these fotos with a Sony DSC-F828, the artifacts are not there in the original .SRF (not sure how I would make these accessible if necessary) or accompanying .JPG files. I have done 0 image processing, just opened it in RT (the artifacts where showing in-program already) and just exported them for test purposes / uploading here.

+ How do I remove / not get them in the first place?

Thanks in advance!

I made a quick revisit to this location to try out the new filter. Standard Adobe color profile, WB on bridge, minimal edits except efforts to reduce fringing between foliage and sky.

After some delay, my Nantong Foric IR chrome filter finally arrived. I was excited to try it so I brought it to work. I took this shot during the short walk from the parking structure to my office; a walk I had done hundreds of times without taking a photo. WB on concrete, minimal edits.

View over the city from a gothic church tower,

TB550/660/850 + GRB3 + Lee 232, edited with pychrome,

CIR-based digital aerochrome emulation, based on Fedias aero stack u/Gratos_I_Panflavul

590nm channel swap

Filters : Yellow + Didymium + DB830 + GRB3.

G/B channel swap + hue adjustement done in u/irlab-uk.

850nm noticably cuts down stray light, eliminating much of the halo around the sun

Used my xt10 for this image and probably the 14mm

Jean Pierre Martel candy pink 3 filter stack. Fun times

For a reminder the Lomo purple stack is : Yellow filter + didymium filter + DB830 + GRB3

The post processing I used the first time was a simple Blue/Green swap. Just like the original film.

Inspired by the Lomo turquoise 180° hue rotation I tried an other method to get the same effect but with a better sky color :

This time I do a Blue/Red swap and a 155° hue rotation. I'm reusing the files from when I experimented with the Lomo Purple inspired filter stack.

EDIT : fun fact : the different channel swap I used and the 155° hue rotation is a very convoluted way to do things. I could just have stayed with the original G/B swap and add to that a 30° hue rotation for exactly the same results.