A few weeks ago I got a roll of Ilford SFX film as a birthday present from a friend. Ilford SFX is a black and white film with an extended sensitivity in the red spectrum (up to 740 nm) so that it can capture also near-infrared. For comparison, conventional film has a sensitivity up to ±650 nm.
To utilize the full potential of this film it is recommended to use a red filter (the darker the better) or even an IR filter. Detailed information for this film can be found on the data sheet here. Luckily I had an old red filter, Konix R2, which is a light red filter. So my images are not that spectacular as someone might expect when using a deep red or IR filter.
For me it was the first time to use such a film. And when taking photos I tried to have always vegetation in the frame, which should show the Wood Effect. However, most of my photos didn’t turned out like typical infrared photos. After reading a bit more about this topic, the reasons could be that the filter was not deep red enough and that most photos were taken when there was no bright sunshine.
Here are some photos which turned out quite nice; I think. And in some of them the Wood Effect is partially visible.
Hi
Nice captures! The SFX just goes into the infrared light spectrum a bit. But I think you have to experiment a bit and yes, like you already mentioned a dark red filter would be helpful. For example, my Heliopan IR Filter looks out all light under 715mn.
Greet from Vienna
Peter
I mean “locks out” 😉
IR Filter is now on my wishlist for Christmas 🙂