This has nothing to do with photography per see but I thought I’d share this link anyway. The link goes to a data recovery centre where you can listen to various types, brands and models of harddisks and how they sound when they have died.

Sounds of dying hard disks.

This site is incredible. Really incredible. If you want to know how your lens is doing technically you must visit this site and check it out. Find out which aperture setting produce the sharpest images for each of your focal lengths.

SLR Gear >>>

Learning to read the diagrams here is a bit tricky but there is a wealth of information on almost any lens you can think of getting for your camera and also other stuff. But I really love it for their lens reviews.