letchhausen wrote:
Interesting, so you converted the camera and then add filters for different effects?
That's right, but throw in some extensive post-processing for most filters/effects. A lot of "color" IR or full spectrum images you see have extensive post processing on the colors to achieve various looks. Though the red foliage/Aerochrome look doesn't require much processing from a converted foveon sensor (just custom white balancing). I have some color filters I'm experimenting with in addition to the Hoya r72.
One more full spectrum shot. Fun to see the yellow come through pretty much normally here.
Graham, The full spectrum shots giving a Kodak EIR result is the most interesting out of the Foveon sensor. The Hoya 720nm etc IR filter ones are perhaps better on a regular Bayer sensor.
realVivek wrote:
Graham, The full spectrum shots giving a Kodak EIR result is the most interesting out of the Foveon sensor. The Hoya 720nm etc IR filter ones are perhaps better on a regular Bayer sensor.
Yes, from my limited experience thus far, the Hoya r72 is best for pure B&W results. The white foliage look is still nice on foveon.
I've also gotten excellent images using a green X1 filter combined with a fluorescent and Foveon Blue color profile. The colors are similar to full spectrum, but the images are noticeably sharper. The result surprised me and I had to test it a second time. Perhaps filtering out shorter wavelengths is reducing chromatic separation.
I also have acquired a Hoya Red 25A filter and Canon Yellow 2 (same as a K2?) for experimenting, though these may require delving into photoshop and channel swapping to get good results.
grahamgibson wrote:
Yes, from my limited experience thus far, the Hoya r72 is best for pure B&W results. The white foliage look is still nice on foveon.
I've also gotten excellent images using a green X1 filter combined with a fluorescent and Foveon Blue color profile. The colors are similar to full spectrum, but the images are noticeably sharper. The result surprised me and I had to test it a second time. Perhaps filtering out shorter wavelengths is reducing chromatic separation.
I also have acquired a Hoya Red 25A filter and Canon Yellow 2 (same as a K2?) for experimenting, though these may require delving into photoshop and channel swapping to get good results. ...Show more →
I have a D70s modded for 720nm. I love the tobacco colored skies it gives. For B&W i use my 830 nm modded D700. The D700 has standard peeling rubber and fogged rear screen. I tried selling but finally decided modding for 830. I love the black skies and sense of desolation 830 gives. FWIW, there are a couple or more IR groups on FB that attract an international audience. It has me trying to hone my IR skills.
grahamgibson wrote:
Yes, from my limited experience thus far, the Hoya r72 is best for pure B&W results. The white foliage look is still nice on foveon.
I've also gotten excellent images using a green X1 filter combined with a fluorescent and Foveon Blue color profile. The colors are similar to full spectrum, but the images are noticeably sharper. The result surprised me and I had to test it a second time. Perhaps filtering out shorter wavelengths is reducing chromatic separation.
I also have acquired a Hoya Red 25A filter and Canon Yellow 2 (same as a K2?) for experimenting, though these may require delving into photoshop and channel swapping to get good results. ...Show more →
grahamgibson wrote:
That's right, but throw in some extensive post-processing for most filters/effects. A lot of "color" IR or full spectrum images you see have extensive post processing on the colors to achieve various looks. Though the red foliage/Aerochrome look doesn't require much processing from a converted foveon sensor (just custom white balancing). I have some color filters I'm experimenting with in addition to the Hoya r72.
Thanks, that helps. I just got a Hoya R72 and it's interesting. I ran a roll of Rollei IR 35mm yesterday for some testing. Today I decided to throw it on my Sony A7RIV to see what it does. This is straight out of camera.
Mimicking the yellow vegetation of the bayer sensor channel swap on a foveon sensor is quite different. Using a Hoya Red 25A filter limits the range of colors while still retaining some separation in the foliage to achieve results like below. I don't have a consistent process nailed down yet. While the aerochrome reds I posted above are pretty close to the image on the live view screen, using a red filter makes everything look completely red so it requires some creative visualization. I like the result though, what do you think?
Here are some of my better color Infrared photos. I've had two over the years, a HyperColor and a Super-Color. The HyperColor combines white-light and Infrared, while the Super-Color sees Infrared at 590nm.
