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10-26-2013, 03:19 PM - 1 Like   #16
Col
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QuoteOriginally posted by Pheo Quote
While we are here, is anyone able to explain to me exactly what autofocus to -3EV actually means.

I'm struggling with the concept of how dark this is?
Exposure value - Wikipedia, the free encyclopedia

Say a landscape lit by a full moon

10-26-2013, 05:17 PM - 2 Likes   #17
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QuoteOriginally posted by Col Quote
Say a landscape lit by a full moon
Or, as the wikipedia article highlights, an outdoors scene illuminated by a 'bright' Aurora borealis or Aurora australis.

Indoors -3 EV happens a lot when you are shooting live music in dim pubs or venues, for example. Being able to meter down into shadowy darkness, and get focus, will be extremely useful, especially as a lot of venues don't allow flash use.

It also means K-3 users won't have to use the annoying AF assist lamp to help us get focus. I hate the AF assist light, and always have it turned off.
10-27-2013, 05:36 AM   #18
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If I calculate right ev-3 is somewhat lower than is possible to shoot handheld unless you go to extreme ISO.

At ISO 6400 you will need 1/4 second at F1.4. For a half decent shutter speed of 1/15 you need to go all the way up to 25,600.


So I would say the AF covers practically any situation where you would think of shooting handheld without flash. The extra sensitivity will still help to achieve quicker and more accurate focus as well as better tolerance of low contrast subjects.

I will no doubt find it useful even for tripod shots as I like low light shooting and focus is often quite a tedious excercise. In some extreme cases I cannot even see the subject so I doubt even the K-3 will help there but in less extreme cases any situation where AF works is going to be a great advantage.

Oddly I have at times managed to focus my K-30 in moonlight, not 100% reliable maybe but quite unexpectedly good. I guess with the K-3 being actually specified to be capable of that it will be as reliable as shooting in daylight.

Last edited by lister6520; 10-27-2013 at 06:51 AM. Reason: Oops - I meant K-30.
10-27-2013, 05:43 AM   #19
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QuoteOriginally posted by lister6520 Quote
Oddly I have at times managed to focus my K-3 in moonlight, not 100% reliable maybe but quite unexpectedly good. I guess with the K-3 being actually specified to be capable of that it will be as reliable as shooting in daylight.
You have a k-3 ?

10-27-2013, 05:55 AM   #20
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Thanks, didn't spot that table in Wikipedia when I was looking, must've got distracted and not scrolled down enough!
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