11-22-2010, 03:42 PM
There is no general value for this, since this depents on the focal length ...
a 50mm lens moves its optical group only a few mm forward in order to
focus from infinity to MFD (usually around 50cm).
A better approach would be to try lenses (like the Tamron Adaptall-2) that
already come with a register distance that is large enough .
You could (of course) also get a Canon EOS body for this.
a 50mm lens moves its optical group only a few mm forward in order to
focus from infinity to MFD (usually around 50cm).
A better approach would be to try lenses (like the Tamron Adaptall-2) that
already come with a register distance that is large enough .
You could (of course) also get a Canon EOS body for this.