Changing lense and auto exposure

[eman]

Hi everyone,

This just happend to me today, don't know if I am doing anything wrong!
I was shooting with a Pentax SMC DA 50-200mm f4-5.6 lense, then I change to my other lense, Pentax SMC DA 16-45mm to shoot. When I got home I found that all the pictures shot with the 16-45mm are all under exposed, while the pictures that were shot with the 50-200mm are perfectly exposed! Lucky I shot all the pictures in RAW mode, so I can fix it up later. Is there a step missing I have to perform after changed the lense? I remember turning the camera off first before changing the lense, but what else should be done?

Thx!
Edward.

[eman]

Oops :p ! Sorry I forgot to mention my camera is a K10D.

[SpecialK]

There is no special trick needed to change a lens. I had that problem with the 12-24 recently where those images seemed a bit dark. Shrug.

[eman]

Sounded like the camera needs to have some sort of reset to tell it to recalculate the auto exposure base parameter every time a lense is changed!

[eman]

I found the problem! it was my lense! The apecture control is broken :( I now have to wait 2 weeks for it to be fixed!