Originally posted by calsan If you can get the same ISO - but as you see, stopping down is normally required to gain depth of field - as it's normally a trade off that we make to stop down and gain noise than risk missing focus.
You're making the mistake of thinking that you often need to stop down to 'match' the DOF you would get with aps-c - and the fact is, you don't. It's actually rare that I need to stop down because my DOF is too shallow - happens, but rarely.
Quote: So FF performs better in tests, but the same in real life.
Actually it's been my experience that it's the opposite, often performs better in real-life scenarios - in delivering photos you really love - than the tests would suggest. All depends on what shooting parameters you deem important of course.
Quote: FF autofocus system has to be twice as good as any APS autofocus system and four times better than the autofocus in MFT.
You have a lot of stuff exactly backwards
aps-c and especially m43 will show AF errors
more at the same display sizes, because the resulting image is magnified more. And you actually need sharper lenses with aps-c and m43 to get the same perceived sharpness.
Also a side note - there is no Pentax camera that focuses as quickly and accurately as my D700 or D800. We should expect a slightly higher-margin Pentax FF to come close or match that performance, finally (hopefully.) That's good news for Pentaxians, believe me.
---------- Post added 09-17-14 at 08:51 PM ----------
Originally posted by Andi Lo 5Dii is a rather old tech now, but it's amazing that K-3 smokes it in low light as it was the standard in wedding photography just a couple years ago.
Not according to DxOMark
---------- Post added 09-17-14 at 08:53 PM ----------
Originally posted by calsan He he. I was surprised to see the K-3 smokes the 5dMkii in low light, when shooting alongside a friend. He was pretty bummed.
It doesn't though, unless you guys were using in-camera NR and you were using more than him (I know wedding photogs shoot jpeg a lot.)
Basically this has been measured, and even though the 5DII has an older Canon sensor it's still slightly better SNR than the K3.