The diffraction limit for a 10MP 4/3 sensor is about f/7.1. If going as
small as f/22 you might want to do some resolution testing to make sure
your aperture choice isn't throwing away detail faster than the
increased DoF is recovering it.
Chuck Norcutt
On 9/30/2010 6:40 AM, Olaf Greve wrote:
> Hi Chuck,
>
> >I tried both flashes set at 1/4 power (1/2 guide number) and full
> power.
> >At ISO 100 I got exposures of f/5 for 1/4 power and f/10 for 1/2
> power.
>
> Even in light of your later made corrections as to power/f-numbers
> this is indeed good news: as these are product pictures where as many
> details as possible are desired (i.e. big DOF) I will most likely be
> opting for settings where the aperture will be closed down to one stop
> below the smallest aperture, or thereabouts. Possibly I'll then end up
> using an aperture of f16 or f22 (possibly depending on whether the
> 'standard zoom' is used (which is the case for most pictures) or the
> 50/3.5 (close-ups)).
>
> Alright, methinks I've got enough of the theory in writing now to give
> some things a go. I hope to get around to it this weekend, but it may
> be later. Your e-mails will definitely be used for finetuning the set-
> up, and I may ask for further advice at a later time...
>
> Cheers and thanks again!
> Olafo
>
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