Eh? This ain't got nothing to do with digital or sensor sizes. Have
you had meters in your cameras for so many years that you've forgotten
all about exposure adjustments for magnification when shooting macro?
The effective aperture is reduced and the image becomes dimmer. Go read
the Oly bellows manual for your punishment. :-)
Chuck Norcutt
On 12/15/2010 4:23 PM, Andrew Fildes wrote:
> I thought we'd dealt with that one recently.
> The view is smaller, not dimmer.
> An aperture is an aperture is an aperture.
> The sensor size does not affect it.
> If I put my Zeiss 180mm f2.8 medium format lens on 35mm, it does not become
> an f2.
> I can put it on my E-P2 and have done for fun. Does it become an f.1.4? No.
> My Voigt. 25mm f0.95 is still that aperture on mFT.
> It's DOF that is affected.
>
> Andrew Fildes
> afildes@xxxxxxxxxxxxx
>
>
>
> On 16/12/2010, at 12:31 AM, Chuck Norcutt wrote:
>
>> But the reason for an f/2 macro lens is not for you to shoot at f/2.
>> It's so you can still focus at an effective f/3 instead of f/5.3 when
>> you're at half life-size. That said, I only have the f/3.5 version.
>> f/2 is too expensive. :-)
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|