I think that you're right, Andrew. the 40/1.4 becomes an 80/1.4 with the 2x
crop factor of the 4/3 cameras.
Chris
On 6 Jan 2010, at 08:53, Andrew Fildes wrote:
> Do you really lose two stops - can't see than myself.
> As in, it doesn't quite make sense to me.
> Isn't it a question of light intensity rather than volume?
> For instance, if I stop down two stops the viewfinder will get dimmer
> (if I hold down a DOF button). But if I were to crop down the
> focussing screen to 4:3rds size instead, the view within that crop
> would be just as bright. Surely.
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|