How about some infrared images

[Jan Pedersen]

So I guess it's probably not old enough to be the IR safe version.

The old version was not IR safe!
That said, have had good results throwing the dark cloth carefully over the bellows before exposure.

[Maris Rusis]

Boulder and Shrubs, Porcupine Track, Infrared

Gelatin-silver photograph on Ultrafine Silver Eagle VC FB photographic paper, image size 19.6cm X 24.6cm, from a 8x10 Efke IR820 negative exposed in a Tachihara 810HD triple extension field view camera fitted with a Wollensak 159mm f9.5 lens and IR680 filter.
Titled, signed, and stamped verso.

[StoneNYC]

Boulder and Shrubs, Porcupine Track, Infrared

Gelatin-silver photograph on Ultrafine Silver Eagle VC FB photographic paper, image size 19.6cm X 24.6cm, from a 8x10 Efke IR820 negative exposed in a Tachihara 810HD triple extension field view camera fitted with a Wollensak 159mm f9.5 lens and IR680 filter.
Titled, signed, and stamped verso.

Wow that's cool! Intense! Why did you use the IR680 lens instead of an IR720 filter?

[Maris Rusis]

The filter I use is a Chinese infrared filter marked IR680. I also have a Chinese IR720 filter when looked through (dimly!) appears the same as an IR680. Both filters shoot the same as well. I darkly suspect the cheap ($20 for 77mm diam) Chinese IR filters are not examples of spectrophotometric purity and may actually be the same. In any case they work and deliver results for little money.

[Jody_S]

(...) Both filters shoot the same as well. I darkly suspect the cheap ($20 for 77mm diam) Chinese IR filters are not examples of spectrophotometric purity and may actually be the same. In any case they work and deliver results for little money.

I second this observation. I have 3 of them in different wavelengths, I can't tell them apart either. I use them interchangeably (on different lenses, per diameter) with no adjustments in exposure.

[Leigh]

The filter I use is a Chinese infrared filter marked IR680. I also have a Chinese IR720 filter...

Given that IR extends from about 680nm out to over 2000nm, the difference between 680 and 720 is insignificant.



I don't know what the limit of the film and optics are.

- Leigh

[evan clarke]

Here's one..4x5 Arca, 110SSXL, B+W 092 Efke Aura.

[mat4226]

I second this observation. I have 3 of them in different wavelengths, I can't tell them apart either. I use them interchangeably (on different lenses, per diameter) with no adjustments in exposure.

I just purchased one of these cheap Chinese IR filters for my 150mm Super Symmar XL and was wondering what filter factor you all are using. Held the filter up to an indoor light to compare it to my Hoya R72's and it's noticeably brighter.

[StoneNYC]

Here's one..4x5 Arca, 110SSXL, B+W 092 Efke Aura.

Do you like the 92? I'm thinking of selling mine, I found the R72 to work better for the RollieIR films, but EFKE is 820 instead if Rollie's which is like 760 or something... Thanks, thinking I selling mine.

[evan clarke]

Do you like the 92? I'm thinking of selling mine, I found the R72 to work better for the RollieIR films, but EFKE is 820 instead if Rollie's which is like 760 or something... Thanks, thinking I selling mine.

I have a bunch of the 820 and this seems to work the way I like..