GX 100 autofocus: so which is correct?

Started Aug 18, 2007 | Discussions thread
alexff Regular Member • Posts: 496
Re: GX 100 autofocus: so which is correct?

Hi David

I specifically want the camera for
low light indoor candids. Does the camera have this additional
autofocus sensor and if so what is it's purpose?

My opinion:

For low light photography without noise issues you better look for something else. The G5 I used before did a much better job. In low light situations the AF is not working as I would expect after reading the Pop-review. Dpreview's review seems closer to reality to me. The flash still has some issues (overexposing).

In my opinion the GX100 is not recommended for low-light photography.
It's a great camera although!

I guess today I'd look for a Olympus C-8080 after reading this http://www.robgalbraith.com/bins/multi_page.asp?cid=7-6468-7844 .

And now, dear Ricohnauts, bash me



The GX100 uses an unusual, hybrid autofocus that combines TTL
focusing on the CCD with an external passive AF sensor. It focuses
quickly and accurately, so much so that we never needed the AF assist
lamp, even in very dim lighting.

AF system: Hybrid TTL phase detection plus external passive system
reads 17 autoselect zones or single central spot; selected zone is
highlighted on LCD monitor. AF zone can be placed anywhere on the
screen in macro mode. Single-shot AF. Cancelable AF-assist lamp.

The Ricoh scores higher on image quality -- in both noise and
resolution (versus G7)

Ricoh edges it in resolution and control of noise,(versus Coolpix P5000

Our biggest complaint is focus speed, and even then only in low light
or (more specifically) at short distances or in macro mode, when it
can be infuriatingly slow (taking up to two seconds to find its mark).

And the GX100 - aside from the focus hunting in low light and
particularly in macro mode - feels fast and responsive too; by
cutting the 'pre focus' step out of picture taking it's possible to
get a shutter/focus lag of as little as 0.3 seconds; well into DLSR
territory (though without pre-focus there is a slight drop in focus
accuracy and you lose the ability to check the camera has picked the
right thing to lock onto).

On the other there are some serious issues with noise and noise
reduction at anything over ISO 80

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