Harmo
Harmo

Balvaird Castle IR HDR pano from the driveway

Balvaird Castle, near Perth, Scotland.

Notes: This was shot using a permanently converted IR DSLR, and because I wanted to see what I could get aw...
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Balvaird Castle, near Perth, Scotland.

Notes: This was shot using a permanently converted IR DSLR, and because I wanted to see what I could get away with... This is also a high dynamic range (bracketed with three shots for each image), then three of these combined shots were formed into a vertical panorama. Making a total of 9 infrared images going into this picture. Some people have lives... I like to tinker.

Ok, so this is my first foray into false colour infrared photography. I admit it's reasonably rough. However, I've learned a lot from this.

1. Infrared photography highlights some of the formerly unknown flaws with certain lenses. You cannot expect that an expensive lens will work perfectly in infrared. In this case, I used a 16-35 2.8L lens. Although it's one of Canon's "Pro" lenses, there's a noticeable "Hot spot" in the middle of the lens. Apparently the anti-reflective coatings don't work as well in infrared wavelengths. This is shown by the slight colour cast (and brightness) in the middle of the driveway, the distant middle trees, and in the middle of the tree branches above the driveway. Hot spots cause significant colour and brightness issues that are time consuming to reduce. Note: I find a Canon 24-105 F4L (Mk 1) works well, but my 50mm F1.4 suffers from another hot spot.

2. Since we can't see in infrared, any colour is as (in)accurate as another. I find having blue skies somehow comforting, but there's no reason it couldn't be any other colour.

3. Using live view, zoomed in, is absolutely critical for focusing in IR. I had my camera professionally converted, but autofocus isn't what it used to be, despite being professionally calibrated. This is because different lenses-zoom lengths completely change the amount of focusing needed.

4. If you change the focal length (zoom) AT ALL, you need to go back and refocus using the technique mentioned in point 3. Use a tripod and your shots will improve substantially too!.

5. IR photography is fun.. although a lot more work in post. :~)
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