Back in the day—50 years ago—I shot several rolls of the old Kodak IR135 infrared film with a red Wratten No. 25 (A) filter. The prints and negatives have long disappeared, but I recall getting some interesting landscape views. I see that Rollei makes a 35mm infrared film, rated at ISO 400/27°. I'm curious as to what anyone's experience has been. My old notes indicate that I shot the IR135 at ISO 10/11°, or 1/30 at ƒ/5·6 (for landscapes), then bracketed ±3 ƒ-stops, "just in case." I'm wondering how I should expose this Rollei IR stock. My interest is primarily landscape in daylight. Any thoughts?