"Brian" wrote in message
news
I have a Canon EOS 300 film camera and a Canon EOS 300D digital
camera.
I have lens for both of these cameras
To makes it easy to understand I'll give the lens letters

A Lens (Lens for Canon EOS 300 film camera 27mm to 80mm zoom)
B Lens (Lens for Canon EOS 300D digital camera 18mm to 55mm zoom)
C Lens (Tamron-F AF 2 x Tele-converter (C-AF1 BBAR MC7))

Lens C will fit on both cameras
Lens A will fit on both cameras
Lens A will fit on the front of Lens C
Lens B won't fit in front of lens C.

Can someone tell me why Lens B won't fit on Lens C?

Regards Brian


Because B is an EF-S lens and id won't fit on the standard EOS mounts. Just
the 300D, 350D and the 20D right now.

EF lenses will mount on an EF-S mount,
but EF-S lenses will not mount on an EF mount.

Jim