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These are posts about retrocomputing and other old stuff. Archive for 2014.

My old Philips 31CT computer flash unit

I have an old Philips 31CT "computer flash". No, it has nothing to do with computer memory—it's a flash unit that sits on top of your camera. And although calling it a computer grossly overstates matters, but it has a small amount of automation built in that allows the flash to measure the amount of light returning from the scene that's being illuminated, and actually stop flashing mid-flash once a proper exposure has been accomplished.

Read the article - posted 2014-03-05

The 31CT flash revisited

After yesterday's experimentation with my old "computer" flash unit, someone on the dpreviews forums suggested that maybe I was getting bad exposures because the flash was a bit too slow for the D7100's 1/250 sync speed. So I set up a little still life to take some more test shots.

Read the article - posted 2014-03-05

Understanding old Nikon lenses: AI, AI-S, AF and AF-S

If you have any interest at all in using older Nikon lenses, you probably have some understanding of the difference between non-AI, AI, AI-S, AF and AF-S lenses. The trouble is that places on the web that explain the differences easily get lost in the details. This article is intended to serve as a slightly easier to digest version of the story.

Read the article - posted 2014-05-08

Nikon FE and/or AI lenses: manual focus in the digital era

Last week, I wrote a review of the Nikon F65 camera. Although the F65 is more than a decade old, it supports most of the photographic automation that we're used to with our digital cameras. The F65 left me wanting to go even further back in time, so this week I'm going to explore manual focus photography with a Nikon FE SLR and Nikon AI and AIS lenses on my current Nikon D7100 digital camera.


Nikon FE with 50 mm AI lens and D7100 with 105 mm AIS lens

Read the article - posted 2014-06-24

I love my new Casio F-91W watch!

The Casio F-91W is a great watch. It's cheap (I paid 15 euros) and simple. It weighs 22 grams. The best thing? The battery life is seven years. Casio started making them in 1991, and they're still selling in good numbers, according to this somewhat incredulous story over at the BBC.

I do have to admit one of the reasons I got the F91W is to see if I could get used to wearing a watch again in anticipation of the Apple Watch.

Permalink - posted 2014-09-11

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