Focus Adjustment and Other Considerations when Shooting Infrared
From very early in my photography I have been fascinated by the unique look and simply luscious tones infrared images can produce. Ansel on steroids. I have only been able to produce anything like decent images recently but pre-digital, inspired by Sir Simon Marsden’s work (www.sirsimonmrsden.co.uk or www.jamescwilliamsphoto.com), I tried some Ilford SFX 200 film that has extended sensitivity up to 740 nm (nanometers). At the time I only had a 6x red R25 filter which produced an infrared result of sorts and I didn’t take it any further. Sir Simon used the same R25 filter but with Kodak High Speed Infrared, sensitive up to 900nm and with less sensitivity to visible light. That combination and a lack of an anti-halation layer gave much more dramatic results with the halo effect so characteristic of his work.
