? looking for 100' 35mm infrared B/W

[Denis R]

looking for 100' 35mm infrared B/W

especially useful for watching crops grow and finding dead spots of heaters

 

[Ektagraphic]

Freestyle Photo (www.freestylephoto.biz) sells a good selection of B/W infrared but they don't list 100ft rolls. If you call them they may be able to get you one.

 

[AgX]

Agfa Aviphot ASP 400s

Rollei Infrared 400S

Both are available as 35mm DP in 30.5m rolls.

 

[mindcircus]

Rollei Infrared 400 35mm x 30,5m. You can find it in macodirect.de

 

[AgX]

Sorry,

I put an`S´ at the Rollei film where it does not belong! (Due to their ominous Retro 400S)

Both films, Agfa and Rollei, originate from the same type of masterfilm, chose what comes cheaper for you.

 

[ajuk]

Where is this AGFA film coming from, surely it should all be sold/expired by now?

 

[Anon Ymous]

Where is this AGFA film coming from, surely it should all be sold/expired by now?

It's coming from Agfa at Belgium, which is still alive. They don't do consumer stuff, but traffic surveilance and reconnaisance films. Maco takes film from them and cuts it to 135, 120, whatever.

 

[AgX]

ajuk,

See here:

(there was a url link here which no longer exists)

 

[cmo]

Infrared starts officially at 780nm. (DIN 5031 standard)

If you want 100 ASA and a real IR film there is actually only the EFKE 820 IR, a film that goes up to 820nm. You will have to ask the manufacturer for 100' rolls, I only saw 35mm, 120 and 4x5" so far. 35mm must be cut from longer rolls, so I expect they could do that.

Aerial and traffic films do come in big boxes, but the downside is that they only come close to the range of the spectrum named "infrared", none of them reaches 780nm. They all have in common that IR sensitivity plunges well below that range. This means you need a real IR filter to keep all visible light out, a much weaker IR effect and long exposure times because you keep all visible light out plus the mentioned sensitivity plunge.
For some reason most of the repackaged films are very expensive though the original aerial/traffic films are not - probably labels are expensive

In practical use you must rate ALL IR and aerial/traffic films much slower than 100 (Efke) and Aviphot (400) because the IR filter kills most of the light. 3-12 ASA is realistic with a real IR filter. We had a thread recently about exposing these films. Only on sunny days ("IR weather") a tripod is not mandatory. In the meanwhile I achieved about 25 ASA with the Efke, XTOL 1:2, 20 min.

This should be the complete list of all IR and near-IR films:

The most famous and "infrareddest" of all B/W films, Kodak HIE High Speed, is not available any more. Sometimes some old rolls are sold on ebay, prices are outrageous.

Real IR films above 800nM:

- efke IR 820 (ISO 100/21°; up to 820nM)
- efke IR 820 AURA (ISO 100/21°; up to 820nM, identical, but no anti-halation layer, gives a nice old-time glow)
- KODAK AEROCHROME III 1443 (Color, ISO 40/17°; bis 900nM, not in 35mm, sometimes offered in 120 size, needs a special developing process)
- Kodak Ektachrome Professional Infrarot (Color, ISO 100/21°; up to 900nM, similar)

Near IR films (less than 780nM):

- Ilford SFX 200 (repackaged traffic film ILFORD SP816T; ISO 200/24°; up to 740nM)
- KODAK HAWKEYE traffic film 2485 (ISO 400/27°; up to 720nM)
- Agfa Aviphot Pan 200 (aerial film, ISO 200/24°; up to 750nM)
- Agfa Aviphot ASP 400 S (traffic film, ISO 400/27°; up to 750nM)

Repackaged Aviphot:

- Rollei Superpan 200
- Rollei Infrared 400

 

[AgX]

cmo,

The Agfa Aviphot ASP 400S is identical to the Aviphot PAN 400S (which goes to 820nm, though with very reduced sensitivity), just a different conversion.

In case you have got a decent spectral sensitivity chart of the Efke IR 820, please post it.


I know of no definition of `near-´ or `real-´ infrared films.
The problem with `near-infrared´ is that this designation is also used for the radiation itself. No IR-film whatsoever can go beyond the near-infrared spectrum.
So this may lead to confusion.

 

[cmo]

As you are from Germany, here is a link to the german Wikipedia site about Infrared radiation:

http://de.wikipedia.org/wiki/Infrarotstrahlung

The official version is:

- Infrared starts at 780nm with a range named NIR ("nahes Infrarot" or near Infrared), consisting of:
- IR-A 780-1400nM
- IR-B 1400-3000nM

As far as I could find out there is absolutely no film that reaches "only" the top of IR-A, see above.

Spectral sensitivity is here, on page 9:

http://www.maco-photo.de/files/images/MACO_IR820c_DT.pdf

 

[AgX]

As I said:

You distinguish between `near-IR films (less than 780nm) ´ and `real-IR films (above 800nm)´.

But as you confirmed there is the designation of `Near-IR´-radiation, a spectrum which no film of any kind will pass, but which extends to much longer wavelenghts than the `near-IR-films´of your definition. This is confusing.

 

[AgX]

Concerning the Efke spectral chart:

It is funny that just you rely on a Maco chart.

 

[ajuk]

It's coming from Agfa at Belgium, which is still alive. They don't do consumer stuff, but traffic surveilance and reconnaisance films. Maco takes film from them and cuts it to 135, 120, whatever.

OK but what about all the Precisa on the Lomo website, that still old stock?

 

[AgX]

I don't know. AgfaPhoto Holding (that is what is left of the insolvency of Agfa's former consumer branch) seems to be able to use the former brandnames. So they may be able to licence any film.

If the packaging bears the red diamond it is certainly old stock, if it bears the red dot it may be anything, including old stock. But even old stock could have been stored frozen.

 

[cmo]

Concerning the Efke spectral chart:

It is funny that just you rely on a Maco chart.

Ah, you got the joke... I knew some people would lough their heads off about this

"Isn't it ironic?" is one of my favourite songs... the lyrics are great:

Another good line:

"It's like ten thousand spoons when all you need is a knife." That makes me think of....

 

[cmo]

As I said:

You distinguish between `near-IR films (less than 780nm) ´ and `real-IR films (above 800nm)´.

But as you confirmed there is the designation of `Near-IR´-radiation, a spectrum which no film of any kind will pass, but which extends to much longer wavelenghts than the `near-IR-films´of your definition. This is confusing.

The above mentioned IR specification is the scientific definition. "Near-IR" is the popular science version that seems to be quite common among photographers, I heard that often, and no scientist complained by now.

From a scientific point of view a film that does not have a sensitivity beyong 780 nm is NOT an IR film at all.

But as you can achieve some wood effect with a strong IR filter and long exposure times with such "near IR" traffic films I avoided to say that these are "No-IR" films.

 

[Denis R]

stil looking...

memory worked for me finally as to where this interest came from,
a special digicam! Dycam Agricultural Digital Camera (ADC) that was discovered while looking for info on Kodak DC-50 Zoom

Basic Specifications:
Spectral sensitivity: 600 nm to 1100 nm, Visible red and NIR ( TM bands 3 and 4 extended)
496 x 365 Pixels

so, what film has that range, or something close?

more info

don't start digital vs. analog bashing!

 

[AgX]

There never was a film reaching that far, though plates that went that far.
The most far reaching film at the moment is the Kodak Aerochrome Infrared 1443, reaching up to 900nm.

And, the more a halide system reaches into the infrared the more cool it has to be stored. Very! deep freezing.