08-09-2010, 10:36 AM
(This post was last modified: 08-09-2010, 10:42 AM by Brightcolours.)
[quote name='wim' timestamp='1281349699' post='1597']
I have. It's useless, 12 mm is too much. You can't focus anymore with the10-22.
That's ok for lenses with manual control of the diaphragm, for EF, or rather, electrically controlled aperture lenses it is more problematic. Closing down the aperture with the preview button trick IMO is quite usless, because focusing wide open is already tricky as it is with the little light coming through at large magnifications. Of course, LiveView may be a solution in that case, but metering may be quite off.
Kind regards, Wim
[/quote]
Liveview with a closed down lens which you have disconnected (rotated away from the contacts) is not do-able, as far as I have been able to try with my 450D. The live view exposure sim, has no idea what it is dealing with, and with a correctly exposed scene (in M) the live view display... is close to black.
Only focussing through the viewfinder is possible, which is NOT hard though, as the DOF is so shallow at these distances that even at f10 you can easily judge focus.
I would not recommend closing the aperture for such a prolonged time, as it can damage the aperture mechanism. Fine with an affordable ultra wide angle perhaps (Canon 10-22mm, Tokina 12-24mm) but a bit less wonderful with a 24mm TS-E!
I have. It's useless, 12 mm is too much. You can't focus anymore with the10-22.
That's ok for lenses with manual control of the diaphragm, for EF, or rather, electrically controlled aperture lenses it is more problematic. Closing down the aperture with the preview button trick IMO is quite usless, because focusing wide open is already tricky as it is with the little light coming through at large magnifications. Of course, LiveView may be a solution in that case, but metering may be quite off.
Kind regards, Wim
[/quote]
Liveview with a closed down lens which you have disconnected (rotated away from the contacts) is not do-able, as far as I have been able to try with my 450D. The live view exposure sim, has no idea what it is dealing with, and with a correctly exposed scene (in M) the live view display... is close to black.
Only focussing through the viewfinder is possible, which is NOT hard though, as the DOF is so shallow at these distances that even at f10 you can easily judge focus.
I would not recommend closing the aperture for such a prolonged time, as it can damage the aperture mechanism. Fine with an affordable ultra wide angle perhaps (Canon 10-22mm, Tokina 12-24mm) but a bit less wonderful with a 24mm TS-E!