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Infrared with the M system

Started 8 months ago | Discussions thread
OP Larry Rexley Senior Member • Posts: 1,238
Color IR shots with EF-M 18-150mm lens (red/blue swap in post)
3

Images from sunset tonight at Sunset Beach in Tarpon Springs, FL.

Testing out what different subjects look like in color IR, including people...

All images shot with full spectrum M200, using a Hoya 25A filter which has a similar IR transmission curve to the 'super color infrared' filters that IR conversion companies sell (the Hoya 25A passes less orange light than a 590 nm color IR filter).

Initially processed in DxO PhotoLab 5 (sharpened and de-noised), saved to DNG format, imported into Lightroom classic for white balancing and red/blue color channel swap, then back into DxO PL5 for presentation processing.

EF-M 18-150mm, 21mm, f5, 1/100s, ISO 100

EF-M 18-150mm, 28mm, f5, 1/80s, ISO 200

EF-M 18-150mm, 150mm, f6.3, 1/320s, ISO 640

EF-M 18-150mm, 18mm, f5, 1/100s, ISO 100

DxO turns out to be great for IR processing. Due to the fact that shooting IR puts a lot of light into just one or two color channels, the noise is much higher even at ISO 100, especially when stretching the contrast of the image to more extremes and changing the white balance quite a bit.

Using DxO allows you to get rid of the noise very well at the first de-bayering step. Tried doing some of these directly in lightroom only and could not get results as good.

I do see a bit of a mild hot spot in some of these images. Guess the 18-150 is not perfect for color IR where a color cast might make a difference, but it's not so bad... the hot spot show up as a vague yellow veiling in the colors-swapped images. I had to correct it in the last image somewhat... what's left of the hot spot does not seem objectionable and I thought added a little to the image.

 Larry Rexley's gear list:Larry Rexley's gear list
Canon EOS M6 II Canon EOS M200 Canon EF-M 18-55mm f/3.5-5.6 IS STM Canon EF-M 22mm f/2 STM Canon EF-M 11-22mm f/4-5.6 IS STM +21 more
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