looking for an ir filter

[back alley]

i'll either get one off ebay or in town here if need be but...

i thought perhaps if you have tried ir film and found it not for you, then maybe you might like to rid yourself of that ir filter just collecting dust.

i could use one in 39/43/46 or 55 mm size. + step up/down adapters if you have one.

we could negotiate...

thanks.
joe

 

[richard_l]

The bad news: IR filters are pricey.

The good news: You don't need one. An ordinary #25 red filter is all you need for most IR film.

 

[sf]

wrong about that #25

I know that from personal experience

I was shooting with a 091 (dunkelrot), and it was hardly enough

you need - and I mean this sincerely - a Hoya R72. Not that pricey at all, actually. It's the B+W ones that are killer costly.

the reason you NEED one for this film is that it's sensitivity isn't all that high in the IR and near IR range. It has a pretty good sensitivity in the visible range, though.
HIE has low sensitivity in the visible range and a very strong and deep sensitivity into 920nm. IN other words, HIE is a high iso IR film in that range and the maco is low. With a #25, you'll see almost no effect on the Maco.

 

[Stu :)]

I just bought a Lee IR filter ($30NZ), scarficed a cheap no-name UV 39mm filter and still had enough left over for a filter for my Panasonic digi.
It may be a plastic rather than optical glass, but go on... prove to me that you can see a difference in final print, especially with IR images.

Stu 🙂

 

[sf]

here is a shot on Rollei IR 400 (same sensitivity range as 820c) using a 091 B+W filter - darker than a #25.

developed in Arista Premium developer as an ISO 200 film. I shot it with a +3 stops compensation for the red filter.

and the second image is the same scene with a normal B&W film.

I just got my Hoya R72 in the mail yesterday - I can't wait to use it. I've got 11 rolls of Rollei IR400 to go.

 

[richard_l]

Good grief! I feel like Rip van Winkle. The only IR films left are HIE and this Maco/Rollei stuff (apparently a good general purpose BW film which happens to be sensitive up to 820nm). You do indeed need an IR filter for this new stuff because of its lower sensitivity to near-IR wavelengths, but a medium or dark red still works fine for HIE.

 

[sf]

The new IR films from Maco & Rollei are not the same film from what I can tell. They seem to have different developement characteristics. I have heard that they are the same film, though. So who knows who's correct.

One thing is, they are like ISO 6 with the proper filter on.

 

[kaiyen]

Wait - isn't the rollei 400 the newer 400 speed IR emulsion from Maco? The 820c and 820 Aura emulsions are older, but I know maco came out with one as a trial about 5 months ago and I thought this was it. If so, then experiences with the older 820 don't apply. I read on apug about shooting it at 400 with filter on and getting decent results. You might find a thread on apug with some searching.

George - have you used the rollei 400, specifically?

allan

 

[Andy K]

I used a Cokin A series Red 003 filter (equivalent to Wratten #25) for all those IR shots in my photobucket album.

 

[kaiyen]

Andy,
HIE is sensitive out to 900nm, so the red 25 works great. The sensititivy that high means you get excellent IR effect without having to use an opaque filter.

However, since the Rollei film goes only out to 820, you need something stronger to reduce the amount of visible coming through. I use a Cokin 89b, which is about a 650nm cut off. The 87 is about 20, and an 87C is way out at 800. I would wager that the Rollei is really, really slow with the 87C. The 87 might be a nice option.

The cheapest thing to try is a piece of unexposed but processed slide film. 120 should be big enough to cover most lenses. Give that a try.

allan

 

[back alley]

i just sent you a p.m. also trevor.
joe

 

[tomtodeath]

i also reccomend the hoya r72, i picked mine up used at a local store for not too much money.
ive used it with ilford sfx with good results

 

[keithwms]

I use a tiffen #87 and like it a lot with the Rollei 400 IR.

The filter is vis-opaque. But if you want to do IR, do IR! 😎

By the way, because I normally do IR with my RB, I bought a 77mm #87 with a step down to the 58mm threads of the mamiya 6 50/4... and I have vignetting. It's not a showstopper, but just so you know, if you go ultrawide, then using adapters is a bit risky.

 

[back alley]

i also reccomend the hoya r72, i picked mine up used at a local store for not too much money.
ive used it with ilford sfx with good results

do you have any examples of the sfx film?
i was told that it has a very mild ir effect and i'm curious to see it.

joe

 

[sf]

do you have any examples of the sfx film?
i was told that it has a very mild ir effect and i'm curious to see it.

joe

SFX has a very limited IR range. I wouldn't bother with it unless you've got some serious filters.

up to 740nm. That's almost 100 short of the Maco and 200 short of the HIE.

 

[kaiyen]

SFX is just fine with the R72. It only goes to about...maybe less than 750nm. Limited, yes, but it still works.

allan

 

[back alley]

well, after trevor returns from his holiday he will be sending me the 2 filters he described in his above post.

the ilford and the maco films are available here and i think i may play with them and see what's what with ir.
thanks for all the info folks!

joe

 

[sf]

I just noticed that if I look through my Hoya R72 filter, I can actually see the effect pretty well. The trees outside my window look white against the evergreen background.

 

[keithwms]

do you have any examples of the sfx film?
i was told that it has a very mild ir effect and i'm curious to see it.

joe

In case it wasn't mentioned someplace above, I think Ilford SFX is cancelled. I wouldn't bother trying to learn it.

 

[LazyHammock]

There are a couple of SFX examples in my gallery (taken using a Hoya R72 filter) - Tule Cabin and San Pedro River. I don't know about the availability any more, I only have 2 rolls left in the fridge.
Cheers,
Nick