joe1946
Veteran
http://www.imaging-resource.com/PRODS/K7/K7A.HTM#videoWhile you can control the lens aperture on some competing SLRs by faking-out the exposure system, the Pentax K7 is the first video-capable SLR that we're aware of that lets you set the lens aperture explicitly. You can't adjust it during recording, but whatever value you set before you begin your clip is the one the camera will use. This is a great feature, one that's been sorely lacking in other video-capable SLRs. We really liked the control this gave us over the depth of field of our recorded videos, and liked knowing that the aperture was exactly what we'd set it to, not some value we hoped we'd tricked the camera into using.
Here's where the Pentax K-7's body-based IS comes into play, though: With most video-capable DSLRs, even normal hand tremor can produce an unsettling unsteadiness in the video image. Thanks to the Pentax K-7's IS system, your videos will be rock-steady, even in the face of poor camera-holding technique.