Sunday, May 8, 2011
Easiest DIY Infrared Filter
If you have a popup flash that can act as a wireless flash commander but want to block the popup from contributing to the exposure, there are a few options out there such as the Nikon SG-3IR infrared panel (which can also work for Canon with some modification). You can also create your own infrared panel using negative film that has been exposed and developed. But the easiest DIY version is to use a floppy disk.
It's a little hard to find a 5.25 inch diskette, but 3.5 inch disks can still be found every now and then. Try thrift stores and dollar stores. Once you find some, it's easy to take a disk apart even without tools.
What I then do is to fold the magnetic disk into half, then half again to 1/4th its original size, then wrap it around the popup flash with tape. Voila... an instant DIY infrared filter.
With this filter, the visible light from the popup flash will be reduced significantly, but you'll still be able to trigger other flashes optically.