So much for the EVF being insufficient for action.....

Started 8 months ago | Discussions thread
Lee Jay
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Re: Is the claim even true?
In reply to Nigel Wilkins, 8 months ago

Nigel Wilkins wrote:

Lee Jay wrote:

According to Fuji Rumors, the refresh rate is 54fps which, if true, makes Fuji's claim of 0.005s (50ms) lag impossible to be true. If the readout and processing speed were both zero (which, of course, they aren't), a 54fps refresh rate means a lag of 1/54 = 0.0185s (18.5ms). Of course, readout and processing speed are not zero. In fact, I suspect they are 0.005s (and Fuji is ignoring the frame period) making the peak lag under ideal conditions (I doubt they are talking about low-light) 0.005+0.0185=0.0235s or 23.5ms. Since I measured my SX50 as having a total lag of 25ms, this is nothing to write home about especially since that 25ms lag made me unable to track a high speed subject I needed to shoot (I simply switched to an SLR and got the job done).

Add to that the claimed CIPA battery life of 350 shots (versus 920 for the Canon 70D) and you're right back to the same old EVF problems - too much lag, too much power use.

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Lee Jay

Excuse my ignorance, but I don't see how 54fps alters lag. The way I see it is it takes 0.005s for the images captured by the sensor to appear on the EVF.

And then you have to wait another 23.5ms for another one - that's latency between the real world and what you are seeing in the EVF, i.e. lag.

That image is displayed for 0.0185s (or less if it disappears before the next one is shown). Even if it was 2fps, lag would still be the same.

The minimum lag, which is largely irrelevant.

It's still 0.005s between capture & display, you just don't get a refresh every 0.005s.

The lag that matters is that between photons entering the lens and leaving the EVF.

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Lee Jay

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