Infrared with the Jupiter-12

[nation_of_pomation]

Hi everyone,

I was scheming about how to take my first foray into infrared photography. I have a few rolls of various black and white IR films laying around and I want to use a wider lens because of the shift in focus with infrared. I was planning on using a knockoff Hoya R72-like filter (720nm) I have in 40.5mm with a step up ring on my favorite wide angle lens, my Canon 28mm f2.8, but gave it a once-over recently and it's looking like it is developing haze. I'm very sad, I barely got to use it, but at least I have a good 35mm lens. Now I'm realizing since the filter ring controls the aperture and the steps are click-less, I can't just attach this opaque filter and set the aperture afterwards. Is it feasible to even expose IR at f22, since other than f2.8 that's the only aperture I know I'm getting? Should I just get a very dark red filter like Tiffen Red 29 so it's see-through? Is there a way I can hold the aperture ring in place while I screw a filter on? Help!

 

[Scrambler]

Get some paper masking tape and put it Round the focus ring. Attach a daylight filter and mark out the aperture points on the paper while adjusting the aperture with the filter. Any reference will do. When you put on the ir filter set to 2.8 and mark the filter ring. Now you have a reference for the aperture setting.

If you want more fiddling you could use tape on the filter ring and transfer the tape to the ir filter.

 

[nation_of_pomation]

Hey, that's a really good idea! I think I'll try it with the tape and see if it works. I think I prefer the look of IR shot with an opaque IR filter over deep red filters so I was really disappointed when I thought I couldn't shoot with the one I had. Thank you so much!

 

[Fotohuis]

You need a RG715 or RG720 IR filter for the actual IR production films Rollei IR-400(S), the Rollei Retro 400(S) , the Retro 80(S) or the Ilford SFX-200 IR film.

Exposure in IR is not critical but using this Hoya 72R filter you can count down approx. 5F stops on the film speed. So iso 12 is the fastest you can get; IR-400(S), iso 6 for the Retro 400(S) , in fact an iso 200 film and also for the SFX-200 under the right IR circumstances. And for the Retro 80(S) it is around iso 1,5 so pretty slow.

 

[farlymac]

You could always get a Series adapter to fit over the lens rim. Make your settings, then slide on the adapter with the filter.

PF