W moim Mark4 występował problem z synchro migawki z 1/300 - chciałem odesłać do Berlina, konsultowałem się telefonicznie, stanęło na tym żeby przysłać do nich aparat. Dziwnym trafem problem ustał po ponownym wgraniu firmware'u.
Czy mogłem zostać wprowadzony w błąd przez pracownika serwisu?
!!! Łączenie podwójnego wpisu !!!
Edit:
Goomiś dzięki za link do artykułu. Zajebiście ciekawa rzecz:
The results? There is no question: Spot-AF makes a huge difference in low light autofocusing. The test circumstances were very dark (two stops underexposed resulted in 12,800 ISO, f/2, and 1/60s) and the settings were the same on both cameras: manually selected center point, one-shot AF, no AF point expansion. For the the 5D Mark II, it had some trouble locking focus, but after 2-3 tries it managed to lock. For the 1D Mark IV (with regular focusing) no matter how many times I tried it just wouldn’t lock, it would just hunt. But, with the activation of spot-af on the 1D Mark IV, the autofocus not only locked, but locked quicker than the 5D Mark II!
So now all of you are confused – at first I say the 1D Mark IV loses but now I say that it wins? Well, this is where Canon made things complicated. On the original lenses that I was using for autofocus testing (the 35L, 16-35 II L and 135L) the 5D Mark II won, but with the 200 F/2 lens the 1D Mark IV won. The difference is that the 200 F/2 lens has an autofocus-stop button on it, and while not important in itself, the autofocus-stop button is the only button that can be used to activate spot autofocus on the 1D Mark IV, meaning that only lenses with an af-stop button on them can use the all-to-important spot autofocus feature. This means that of the 60+ lenses that Canon manufactures, only 7 very expensive super telephoto IS lenses (200 f/2 IS, 300 f/2.8 IS, 400 f/2.8 IS, 400 f/4 DO IS, 500 f/4 IS, 600 f/4 IS and 800 f/5.6 IS) can unlock the spot-af feature of this camera. So, in my eyes, spot-af is not a normal focusing mode as it is inaccessible 75% of the time I will be using this camera.
AF-Test
In the non-flagship 7D the spot-autofocus mode is included as a normal focusing mode accessible regardless of what lens is utilized. So why did canon limit the implementation of this feature on the 1D Mark IV? On page 4 of an article published by Canon they state: “Spot AF is not provided as a standard autofocus mode because when tracking moving subjects it may slow the autofocus operation as it uses a smaller area to detect focus from, and is therefore slower to detect defocus and respond to it“. Basically, they are saying that its not a good mode for sports or wildlife photography. OK, I can accept this explanation, but what I can’t accept is why they are only implementing this focus option in conjunction with lenses designed specifically (if not exclusively) for sports and wildlife photography when Canon admits that the focusing mode doesn’t work for these forms of photography? For me, the perfect use for this focusing mode would be at a candle lit wedding reception. Unfortunately, I don’t use a 500mm f/4 too often at a wedding reception, but rather my 35 f/1.4 L and 85 f/1.2L. The limitations on this feature seem exactly the reverse of what they should be.
Odpowiedz z cytatem
