FZ200 Diffraction Limit - Panasonic Tech Service

Started Aug 27, 2013 | Discussions thread
sherman_levine Forum Pro • Posts: 11,020
Re: FZ200 Diffraction Limit - Panasonic Tech Service

LTZ470 wrote:

Received a reply back from Panasonic Tech's on the FZ200 and where the Diffraction limit begins:

Dear Valued Customer
Case Number:30742743

Thank you for your inquiry, the diffraction (FZ200) starts 3.5 to 4.0.
We hope this information is helpful.Thank you for contacting Panasonic.

Experience is a funny thing, it is hard to beat...so don't believe all the Diffraction Calculators and so called camera experts on the internet...we ourselves can easily determine it from our user experiences...

Interesting that the response was so brief - but it's consistent with your posting yesterday that your images start getting soft at apertures narrower than 4-4.5.

It's consistent also (albeit with a different absolute) with Ian's ZS19 results, where the resolution varies only with aperture, and is independent of zoom.


I suspect their answer is more to "When does diffraction become the limiting factor in resolution" than "When does diffraction start"....since diffraction is of course always with us.  The zoom lens is far more complex than the thin single lenses for which Airy discs are calculated, and it's not trivial (at least for me) to extract the relationships among the physical iris diaphragm diameter, the distance from the sensor, and the magnification of the zoom mechanism by the front lens as the zoom is changed.


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