Overview. We’ve had this Sony Alpha a7S modified for IR photography by the good people at Kolari Vision. The low-pass filter was removed and replaced with an internal 720nm infrared filter. Instead of capturing three different colors of visible light, the camera now sees three different wavelengths in the near-infrared spectrum.

E-mount. Sony has created its line of FE lenses for the a7 series. These full-frame lenses use the E-mount, but provide a larger image circle for covering the full-frame sensor. The existing APS-C E-mount lenses are compatible with the full-frame a7-series; however, you’ll have to shoot in crop-frame mode or accept any vignetting caused by the smaller image circle.

Normal Use. You use an IR-modified camera just as you would a normal camera: autofocus works, live view works, and in-camera metering works. Exposure times are similar to a normal camera when shooting in sunny conditions where IR light is abundant. Try to shoot under indoor artificial lighting (not really any IR light there) and you’re going to need a tripod. Note: you may see front or back-focusing using autofocus under some lighting conditions.

This Thing is Different. For those of you who aren’t familiar with IR photography, the look is very different. You’ll want to read up on shooting in IR and the post-processing required for the images.