A prediction of the D400.

Started May 31, 2013 | Discussions thread
lock Veteran Member • Posts: 6,202
Re: What should an evf be able to do to replace an ovf?

jfriend00 wrote:

lock wrote:

In action photography?

From my limited experience with an EVF and the corresponding focus system, here's what it would need:

1.  No visual lag

2.  Continuous focus performance better than D300 (including moving targets, low light, complicated background and while shooting at max fps)

3.  No blink or flash of the EVF when focusing or shooting

4.  Enough visual fidelity in the EVF to tell if you're focused on the right part of the scene

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The biggest challenge would be to keep the evf up to speed In low light (point 2). On the one hand, the refresh rate drops and the image is brightened to make things visible. On the other hand, when this happens the light will be that low you will not see much at all with an OVF. In normal light there is hardly any lag left (read the comments about the a77) and refresh rates are up to 120fps already. 240 fps is next. Once lag drops below our reaction time in low light, there is no problem left.

About 4.: focus peaking is a real time feature that will instantly show you what is in focus. It is basically a manual focus mode feature, but it works with AF in single shot mode on Sonys too.


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