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

Started Mar 28, 2013 | Discussions thread
BorisK1 Veteran Member • Posts: 5,644
Re: TG-2 sample shot at ISO 100 and my initial impression

Jefftan wrote:

BorisK1 wrote:

Note that TG-1/2 aperture is a combination of an iris and an ND filter.  Closing down past f:2.8 is done by enabling the ND filter, and does not affect the size of the airy disk.


I don't know that .  Where do you find this info? closing down past F2.8 is done by ND filter and won't get into diffraction?

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.

That would be nice as I don't need to use A mode at F2-2.8 to avoid diffraction

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.

Even auto choose F8 is OK if what you said is correct.  Actually after reading TG-2 manual I don't find any mention of ND filter

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.

 BorisK1's gear list:BorisK1's gear list
Olympus Tough TG-4 Olympus E-3 Olympus Zuiko Digital ED 50mm 1:2.0 Macro Olympus Zuiko Digital ED 40-150mm 1:4.0-5.6 Olympus Zuiko Digital 11-22mm 1:2.8-3.5
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow