Anyone use two brands of cameras?

[xfloggingkylex]

What made me start thinking about it more is I just got myself a 17-50 f/2.8 lens, and she just has the 18-55 kit lens in that focal length, so she wants to get the Pentax 16-50 f/2.8 now. It just seems redundant to buy similar lenses(granted the Pentax lens has better build quality than my Tamron) when we could just share lenses if we had compatible systems.

usayit-I plan to get a 40D as a Christmas gift to myself this year, so I'll have my 30D as a backup.

for a backup camera, you could buy the pentax 50mm 1.4 for 200 (often with a rebate) and be set.