Panasonic GH3 review published

Started Apr 15, 2013 | Discussions thread
Anders W
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Re: Panasonic GH3 review
In reply to Dr_Jon, Apr 16, 2013

Dr_Jon wrote:

Flash sync speed (if the curtain could move over the sensor reliably at 1/200 of a sec they would have specified that not 1/160) and the number of rows.

Yes, I realized that's where you got your time estimate from. It wasn't that estimate per se I was wondering about. It was rather the point you make below.

On the CPU side it's a pain getting a processor to address stuff (row resets) and do reliable and consistent timing at those speeds (although I know no details of the working of the Venus engine). Interrupts can be a tricky and dedicating a CPU to nothing else is unlikely to be an option when something exciting like taking a photo is happening (especially in an existing design). You ideally want it done on-sensor or at least having a dedicated timer in the CPU connected up to some circuitry on the sensor to make it easier. IMHO of course.

Hard to tell without knowing more. Did you check whether the patent application itself says anything more about this (i.e. whether the processing required to sync takes place on the sensor and the external CPU just issues a general command to sync in this or that fashion)? So far, I've just had a quick look at it.

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