None IR Film shot with IR filter

GKR1 · Oct 22, 2013

I screwed up and shot a whole roll of Rollei Retro 100 with IR filter on lens, I thought I had IR400 loaded.

Anyhow, does the Rollei Retro has any response to IR? Should I do a 2 hour stand dev on it? or it will be waste of time and see no images?

Thanks

Prof_Pixel · Oct 22, 2013

What filter did you use as an IR filter?

See http://www.fsdistribution.biz/index.php?l=rollei&id=retro for spectral information.

polyglot · Oct 22, 2013

It will be about 8 to 10 stops underexposed (assuming the normal visible leakage through an R72), plus about 2 stops because you were probably metering for 400 not 100.

It will be practically blank. You might get a couple of dim spots in the highlights but I doubt it.

pdeeh · Oct 23, 2013

You may be surprised.

I think the Rollei Retro series might all have an extended red/IR sensitivity .

(400S certainly does, but you can soon check on the MACO site for the data sheets which include sensitivity plots for 80S or 100S, but having said that the 100 (not "S") I think might be a a different film)

FWIW, I've shot 400S with a 650 & 680nm filters and got distinctly IR-ish results.

Soeren · Oct 23, 2013

polyglot said:
It will be about 8 to 10 stops underexposed (assuming the normal visible leakage through an R72), plus about 2 stops because you were probably metering for 400 not 100.

It will be practically blank. You might get a couple of dim spots in the highlights but I doubt it.

Hmm more like a setting in the area of EI 4-25 since its an IR film (IR400)

http://www.digitaltruth.com/products/rollei_infrared.php

It may turn out blank anyway if a 720 filter was used.

http://www.ars-imago.com/productinfos/Retro_techical_e.pdf

Best regards

AgX · Oct 23, 2013

The Maco datasheets are not trustworthy.

If behind the Rollei Retro film hides Agfa APX, then there will be no IR-sensitivity.

Soeren · Oct 23, 2013

AgX said:
The Maco datasheets are not trustworthy.

If behind the Rollei Retro film hides Agfa APX, then there will be no IR-sensitivity.

Seems youre right

http://www.digitaltruth.com/products/agfa_tech/FPD1e.pdf scroll down to page 9

Best regards

MartinP · Oct 23, 2013

Rollei Retro 100 is some of the last Agfa APX100. Nothing happens after 720nm - on the positive side you can probably just re-shoot the roll, as it hasn't been exposed . . .

Extreme highlights, many stops of over-exposure, might have left a trace through the IR filter but that's about all. Perhaps re-use it for testing purposes (unknown shutter, questionable repair etc.), or just for curiosity try some outlandish double-exposures. It is a 'free' roll of film now.

Neal · Oct 23, 2013

Dear Amir,

Re-roll it and shoot it again. It's almost certainly blank.

Neal Wydra

StoneNYC · Oct 23, 2013

Make sure to post results as now we are all curious!

Sent w/ iPhone using Tapatalk

GKR1 · Oct 23, 2013

Thanks for all the replies. Yes it is rebranded APX 100 so I think it would be safe to re-shoot the roll. Now here is the million dollar question?

Can I just load the film the way it is now and start shooting? or do I have to take it off spool and re-spool from exposure #1?

Thanks

StoneNYC · Oct 23, 2013

GKR1 said:
Thanks for all the replies. Yes it is rebranded APX 100 so I think it would be safe to re-shoot the roll. Now here is the million dollar question?

Can I just load the film the way it is now and start shooting? or do I have to take it off spool and re-spool from exposure #1?

Thanks

You have to re-spool it, in the dark

Reason is the tape that holds the film to the paper is only at one end, so you risk the non-taped version catching inside the camera and mucking up the works.

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polyglot · Oct 23, 2013

GKR1 said:
Thanks for all the replies. Yes it is rebranded APX 100 so I think it would be safe to re-shoot the roll. Now here is the million dollar question?

Can I just load the film the way it is now and start shooting? or do I have to take it off spool and re-spool from exposure #1?

Thanks

If it's 120 you must respool. If it's 135, it will be fine.

By all means re-shoot it, but not for anything important. Re-spooling has inherent risks and as mentioned previously, you might have a couple of extreme highlights (e.g. sun-glints off metallic surfaces, or the sun itself) showing up dimly in your new photos.

Soeren · Oct 24, 2013

"IR-preflashing panchromatic film. Effects on emulsion speed and tonality?"
Best regards

Gabino · Oct 26, 2013

As it was stated before, it depends on the film-filter combo used. Just as an FYI, I've intentionally used an IR B+W filter with Fuji acros and got satisfactory results:

http://www.flickr.com/photos/31923226@N07/9096069049/

None IR Film shot with IR filter

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