Loading and unloading Macophot film

[hugh_jaramillo]

This is about the only IR or semi IR film on the market, my questions

are:

 

1. Does this film need to be loaded and unloaded in total darkness?

 

2. What is the appropiate ISO for a sunny day

 

Thanks

 

Hugh

[bj_bignell]

Yes, this film should be loaded in complete darkness. You can find the technical data sheet, which may have some ISO recommendations, at http://www.mahn.net/Frameset.htm

[discpad]

Hugh, you need to treat all IR films like color film, and then some: No night vision goggles or IR video cameras either; and make sure your plastic tanks are IR-proof, as well (like Jobo tanks).

 

For reference and other caveats, take a look at the datasheet for Kodak EIR, which is Ektachrome infrared film, at: http://www.kodak.com/global/en/professional/support/techPubs/ti2323/ti2323.jhtml or see the PDF below.

[bruce_karnopp1]

MACO suggests loading in total darkness. I do that with 4X5 sheets because that is the only option. But wiuth 120 film, I load in the shade. In fact MACO 820c is much slower than Kodak HIE. I have 120 film in HIE from David Romano :http://www.davidromano.com/ which I also load in the shade.

I also process each of these films in Paterson and JOBO plastic tanks without any problem. So my experience is that one needs to be careful but not crazy with the film. I do try to keep the film as cool as possible when I am in the field - particulary after exposure.

[hugh_jaramillo]

Thanks all for your promp answers

 

Hugh

[scott_davis5]

Depending on which filter you are using (and to get a good IR effect, you need to shoot with at least a Hoya RM72 or an 89b, depending on taste/budget), you should expose this stuff somewhere around ISO 6-12. Set a handheld meter to ISO 12, take the reading, then transfer that reading to the lens. Don't apply a filter factor on top of this reading.Bracket your exposures up and down a whole stop. You may still be disappointed in this film's IR response - it doesn't look like grain-free HIE.