Number of available lenses is a big decision factor while choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that Canon 400D has an advantage over Samsung GX-10. There are 326 lenses for Canon 400D's Canon EF/EF-S mount, on the other hand there are only 155 lenses for Samsung GX-10's Pentax KAF2 lens mount.
Another important factor is the availability of image stabilization. Samsung GX-10 has a big advantage in this regard because it has a sensor based image stabilization which means that all the lenses mounted to this body will be stabilized. On the other hand, Canon 400D doesn't have this feature so you have to buy a lens with optical stabilization feature. Currently there are 112 lenses for Canon EF/EF-S mount with Optical Image Stabilization features.
||# of Canon 400D Lenses
||# of Samsung GX-10 Lenses
|Wideangle Fisheye Prime
|Perspective Control Prime
|Telephoto Mirror Prime
Now let's compare some sample lenses from each mount with typical Focal ranges for Canon 400D and Samsung GX-10 to see how these lenses compares:
Fast Standard Zoom Lenses
Fast Tele Zoom Equivalent Lenses
Fast Normal Prime Equivalent Lenses
Fast Wideangle Zoom Equivalent Lenses
24-105mm f4 Equivalent Lenses
Super-Tele Zoom Equivalent Lenses