Monthly Archives: December 2007

Quanta from Dr. Color’s Assistant: METACOW

Sorry for not posting anything color-related recently. I’m very busy with something important (but not very interesting) right now. The colorful language will return soon. Nevertheless, here’s a quick color-related post.

METACOW: “A Public-Domain, HighResolution, Fully-Digital, Noise-Free, Metameric, Extended-Dynamic-Range, Spectral Test Target for Imaging System Analysis and Simulation”. Wow, that’s hot!



Thanks to Steve for the tip.

Posted in Color and Vision | Leave a comment

Mather’s first law of technology

As a corollary to Arthur C. Clarke’s third law of prediction — “Any sufficiently advanced technology is indistinguishable from magic.” — here is my new law of technology:

Any insufficiently documented technology is indistinguishable from magic.

Posted in General, Software Engineering | Leave a comment

Attaching a lensboard to a large format lens

I have to confess that I’m a little intimidated by my new camera. My first question, “How do I attach the lens to the camera?”

So I went to the two books I have: Jack Dykinga’s Large Format Nature Photography and Ansel Adams’ The Camera. But these didn’t quite have the practical information I needed. So I went to the Internet, which of course had plenty of contradictory information. One site recommended using a camera repair shop for the task. Another said I could do it myself if I sent the kids out of the room. All of this contradictory information was tempered by David C. Karp’s authoritative lens primer, which gave me the confidence to try it myself.

My experience is that attaching a lens to a lensboard (which attaches to the camera) is really easy.

Here’s what you need:

  • A lens
  • A lensboard
  • A lens wrench that matches the shutter on your lens

I’m going to assume that the shutter is already attached to your lens. It may be more difficult if this isn’t the case.

To attach the lens to the board:

  1. Unscrew the rear half of the lens from the shutter.
  2. Unscrew the ring collar from the shutter.
  3. Place the lensboard on the shutter and align it to suit your tastes.
  4. Screw the ring back onto the shutter, sandwiching the lensboard between the shutter and the flange.
  5. Tighten the ring so that the lens does not move when you try to mount it on the camera or use the controls. You will need to use the lens wrench to get the ring tight. (See the picture below.) I’ve read that you should avoid overtightening.
  6. Screw the rear half of the lens back on, and you’re done.

That was easy!

I plan on posting more of these little tidbits as I learn how to use my camera. Next up: loading film.

Posted in Large Format Camera, Photography | 1 Comment