New Industry Standard for IS/VR Lens Performance
July 1, 2013 Leave a Comment
Canon offers IS and Nikon offers VR – technologies that reduce picture blur when handholding a camera. There’s always been some debate about how well those systems worked, and the companies keep coming out with new versions that area supposed to be more effective, but there’s never been a standard for measuring effectiveness until now.
Nikon has published the results of their CIPA testing. Results range from a low of 2.5 stops to a high of 4.5 stops. 4.5 stops means that the image-stabilizing technology is as effective as increasing shutter speed by 4.5 stops. So a photo taken with VR at 1/60th of a second would be equivalent in sharpness to a photo taken without VR at 1/1500th of a second.
VR (and Canon IS) mean you can get a sharp picture using shutter speeds that are slow enough to get a good exposure in a broad range of lighting conditions. They also mean you can get the shutter speed down in the range where you can use a flash at full FP sync – typically 1/200 to 1/250th of a second.
P.S. VR/IS lenses are also great for handheld video. You shoot video at a shutterspeed of 1 over twice the frame rate – so 1/60th of a second for 30 fps video -Â so you can’t get sharp images by using a quick shutter speed.