ISO 12233 Test Chart

OK, I've posted more equipment-related links so far than I originally intended to. Here's one more: an ISO 12233 test chart, used for measuring the resolution of your lens/camera combination. Normally these charts cost about USD$100, but this one has been created from the ISO description and made available for free.

http://www.graphics.cornell.edu/~westin/misc/res-chart.html

That's the last equipment-related link for a while! The next few will be about composition and aesthetics...