A filter thread is what's used to connect a glass filter to the front of your lens - like screwing a lid onto a jar (except the thread is on the outside).
Originally Posted by Chrissie
Never heard of the Nokia D50 - sounds like a camera phone!
The IXUS is a Point & Shoot camera - convenient but a compromise for serious photography. The 30D is a mid-range digital SLR - great for serious photography but a compromise to convenience.
Christian Wright; Dip Phot
EOS 5D Mark III | EOS 600D | EOS-1V HS
L: 14/2.8 II | 24/1.4 II | 35/1.4 | 50/1.2 | 85/1.2 II | 135/2 | 180/3.5 Macro | 200/2.8 II | 400/2.8 IS | 16-35/2.8 II | 24-105/4 IS | 70-200/2.8 IS II | 100-400/4.5-5.6 IS
580EX II | EF 12 II | EF 25 II