Great dramatic results, extremely crisp especially in 120

Rollei IR400 has a reputation for being thin and difficult to handle in 5x4. With a little care getting it into a reel, I have found it is perfectly manageable in 120 roll. I have shot several rolls in a Mamiya C220. Just about all the frames were with a 720nm filter. If you are new to IR film, there are a few things to be aware of. To get the best out of the infrared effects, you may well want to shoot brightly lit foliage, so this isn't the ideal film for a dull overcast winter day. The 720nm filter is going to lose 6-8 stops, so a tripod is essential. Even for a fairly bright scene, you are likely to be shooting at around 1 second. The Mamiya has no infrared focus scale, so I just guess. It means you tend to lean towards shooting at high f numbers to keep as much in focus as possible. If you like the look of IR photos, it is worth persevering I think. You can shoot a frame without the filter of course, so long as you go back to a normal calculation without the loss for the filter. I have included a shot inside a church as a normal B&W frame and one outside the same building with the filter on and a 1 second exposure:

Brilliant

I love the affect of shooting this film as infrared… despite how tedious it can make the process of composing. Just ignore the fact I left it in my camera for three years…

Having shot infrared with my digital camera a few times, I decided to try doing the same with film.
I exposed this at the suggested ISO 25 with a 720nm filter, and the results were great, with bright white foliage and dark blacks in the water and sky, exactly as I wanted.