whats up with my FZ200 images

Started Jan 4, 2014 | Discussions thread
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Re: f/8 (like f/22) isn't always a no-no
In reply to sherman_levine, Jan 6, 2014

sherman_levine wrote:

Artifact at at narrow aperture seems to be much more of an issue at full W/A than at full zoom. I'm not sure why.

For thin lenses, diffraction varies with f-stop (for w/a lenses, the aperture is physically smaller than for tele lenses, but the w/a lens is closer to the sensor). On the other hand, FZ150 (for example) does just fine at its maximum zoom, with very little evidence of diffraction artifact despite the high f-stop.

How interesting. With my achromats I use the whole range of zooms beyond 4x or so, possibly 7x or so with the FZ200 with Raynoxes on the tube. I remember doing some tests which clearly showed loss of detail as aperture decreased, but I'm afraid I can't remember which camera that was! It was a year or three ago.

Very interesting about the FZ150 at maximum zoom. I think I might try a series with the FZ200.

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