TG-2 sample shot at ISO 100 and my initial impression

Started Mar 28, 2013 | Discussions thread
Jefftan
Senior MemberPosts: 1,112
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Re: TG-2 sample shot at ISO 100 and my initial impression
In reply to BorisK1, Mar 30, 2013

BorisK1 wrote:

Sorry, can't give you a source for that information, but it's fairly obvious.  All small cameras use ND filters for apertures, and very few have irises.  Look at the diffraction calculator. At F:8, the diameter of the airy disk is 10.7 µm, while your pixel size is 1.5 µm. That would give you something like 1MP resolution.  Like shooting a film camera past F:48.

The only reason the TGs have an iris is because at the wide end of the zoom, f:2.8 is not diffraction limited.Yeah, but you still lose shutter speed.  And the ND filter doesn't affect DOF.  That's my main beef with the TG-1 - it enables the ND filter when it could've used a faster shutter speed instead, and the only way for me to force the faster shutter speed is to raise the ISO.

It's okay from the point of view of diffraction, but not when you want to capture fast action in broad daylight, and suddenly find yourself at 1/250.

In the wide position at least F2.8 is closing down using a real iris

It is sharper than the same picture taken at F2

Or is this a DOF thing? F2.8 will have more DOF than F2 so more in focus

Don't undertand

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