[mmc]

Hello all. First post here. I have a Canon XSi(450D) and would like to get a manual focus lens. I'm looking at either the Voigtlander 20mm f3.5 or the 40mm f2.0. Even though I currently have a Canon body, I would not rule out a future Nikon DLSR, or more likely, a Four Thirds/EVIL camera. One of my factors in choosing a lens will be it's compatibility with different camera bodies/mounts. Even though the two previously mentioned lenses are available in a Canon EF mount, I'm wondering if it would be better to get one in a Nikon mount? I understand that I would lose the Canon metering if I used a Nikon-mount lens with my XSi (via an adapter), but I think the addition of the aperture ring on the Nikon models would be better in the long run.



Question: I've read the [url="5d review http://www.opticallimits.com/canon_eos_f...20f35eosff"]Voigtlander 20mm review[/url] on a Canon 5D full-frame body (Nikon-mount lens via an adapter). Will the same Nikon-mount lens (either the 20mm or 40mm, via an adapter) work properly/physically fit on a Canon APS-C body (specifically, the XSi)? I haven't found any reviews yet that covered this body/lens combo.



Nikon-mount lens:

Pro's:

- Works on Canon EF body via adapter, full manual control

- Works on Nikon body, auto metering or full manual control

- Fits Four Thirds/EVIL mounts via adapter (I assume full manual control?)

- Dedicated aperture ring

Con's:

- No auto metering on my current Canon XSi



Canon EF-mount lens:

Pro's:

- Auto metering on Canon body, aperture control through Canon body

- Physically fits Four Thirds/EVIL mounts via adapter

Con's:

- No aperture ring (no manual aperture control on Nikon/Four Thirds/EVIL mount)

- Won't fit on Nikon body



Do I have the above Pro's and Con's correct? If so, I'd buy a Nikon-mount lens and gladly lose auto metering on my XSi for the future compatibility on other bodies. But I am concerned about the physical fit. Any other thoughts? Thanks.



Matt