The a7R is not compatible with the Nikon 24mm f/3.5 ED PC-E Nikkor with any adapter that I’ve tried. The “E” in the name stands for electronic diaphragm, and I know of no adapter that supports it. If there aren’t any adapters that support the lens, that’s too bad, because the PC Nikkors seem otherwise… [Read More]

When I last discussed sharpness testing, it was in the context of shutter slap.  Before, I’d been working on generalized sharpness testing, in which many sharpness-damaging effects — camera motion, diffraction, lens quality, flatness of field, adapter alignment, etc. — were given the opportunity to create the final result. While I’d like to be able… [Read More]

Lens hoods are like coat hangers; they multiply when left in isolation. Actually, there’s a reason for that big pile of lens hoods in your camera cabinet: it’s not obvious which ones go on which lenses. A new lens comes with a lens hood, but you don’t always use it with the hood. When you… [Read More]

Yesterday my D4 made its 50,000th exposure. That’s 1388 36-exposure rolls, or almost 70 bricks. If you had to buy slide film and have it processed, that many shots would cost you at least $25K. And the camera isn’t even two years old. I blame Lightroom. In the film era, you were limited in exposures… [Read More]

Huntington Witherill sent me this: The Sony A7r is (IMO) a ground-breaking camera that will, I believe, experience wide spread use. However, the camera currently has a couple of nagging issues, one of which is a decidedly short battery life. The vertical grip (Sony part #VG-C1EM, which then facilitates the use of two (2) batteries,… [Read More]