But, assuming that you are not at a diffraction limited aperture the
shorter focal length lens on the 4/3 camera still delivers greater DOF
at the same aperture. That can either be a free lunch or a very costly
one depending on your point of view for a particular photograph.
Chuck Norcutt
Ken Norton wrote:
> The 2X factor is applicable if you are measuring diagonally, however, if
> the important measurement is vertical, it is actually a bit less, more like
> 1.75 or something like that. Regardless, as a quick-and-dirty comparison,
> the 2X factor for 4/3 vs 35mm is close enough for government work.
>
> There is another factor involved here regarding DoF and apertures:
> Diffraction. Lenses are diffraction limited per the enlargement multiplier.
> So, that F4 in 4/3 = F8 in 35mm also extends diffraction limits. If a FF
> 35mm lens hits noticable diffraction limits at F16, the 4/3 lens will be
> hitting the diffraction limits at F8. There really is no free lunch when it
> comes to DoF, regardless of the "film format".
>
> The only thing guaranteed to improve you images is the use of the classic
> Silvernosed-Zuikos.
>
> AG
> http://www.zone-10.com
>
>
> ==============================================
> List usage info: http://www.zuikoholic.com
> List nannies: olympusadmin@xxxxxxxxxx
> ==============================================
>
>
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG.
> Version: 8.0.134 / Virus Database: 270.4.3/1529 - Release Date: 7/1/2008 7:23
> PM
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|