Infrared Indoors
I’ve been wondering what the process is for taking ir photos indoors. I understand that a speedlight produces light in the near infrared range but there is a filter that blocks infrared and ultra violet light. Since I have an older Yashica flash that I am not using, I figure it is time to experiment.
The flash has zoom capabilities so In order to convert the flash I first pulled off the zoom head and removed the filter. This should allow infrared light to pass. To filter the visible light when the flash fires, I decided to 3D print an adapter to mount a Hoya R72 filter which wil block the visible light from the flash leaving only a faint red glow when the flash fires.
Tried a few random test shots and it seems to work ok. I then tried to take an actual photo in a dim room with just indoor light. What I did not consider is that led or fluorescent light does not emit infrared. It is somewhat difficult to take a picture when you cannot see the subject. So it appears that some supplemental lighting is required and maybe flash is best used as fill lighting. Looks like more testing will need to be done.