Joho the Blog » cameras

November 14, 2012

Daily [Intermittent] Open-Ended Puzzle: Camera shutters

Why do digital SLR (single lens reflex) cameras have shutters?

In analog days, the shutter let light in for some determinant time. That caused the film to be exposed for that duration. But in the digital age, why doesn’t “setting the shutter speed” just tell the internal computer how long it should record data from the sensor? What good does it do to actually open and close a physical shutter?

Just curious. And probably misinformed.


May 9, 2009

n00b guide to digital photography

PC Magazine has a useful guide to taking your digital camera off automatic.

David Sifry’s 2007 guide to buying a digital camera still gives good guidelines, although the particular models he recommends are of their day. tells you how to use a piece of paper to vastly improve the results of flash photos. (via Tim Bray) And here’s a way to make a diffuser for your built-in popup flash. (I haven’t tried it.) Here’s one for $20, which I also have not tried.

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