Will phase focusing go the way of the dinosaur?
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From: John McWilliams on 8 Jun 2010 11:44 Bruce wrote: > On Tue, 08 Jun 2010 08:31:39 -0700, Paul Furman <paul-@-edgehill.net> > wrote: > >> Bruce wrote: >>> On Sun, 06 Jun 2010 21:51:13 -0500, James Nagler >>> <jnagler(a)spamproofed.net> wrote: >>>> Every last DSLR photo posted by every participant of these >>>> newsgroups using all brands of DSLRs has shown focusing errors. More often >>>> due to having too shallow DOF but still compounded with poor auto-focusing. >>> You have a point, >> No he doesn't. > Unfortunately for you, he does have a point. If you want to disagree > with him, please do it directly - in other words, with him. Well, now, tony, I disagree with you on this: Why disagree with a pest/troll? And it's perfectly fine to disagree directly with those who second a "point". His statement is so broad as to be meaningless. How unusual. -- john mcwilliams
From: Bruce on 8 Jun 2010 13:05 On Tue, 8 Jun 2010 09:24:25 -0700, Savageduck <savageduck1@{REMOVESPAM}me.com> wrote: > >Many of us refuse to respond to the P&S troll of many names regardless >of what he has to say, or point he might have. >Hell we all have "points", some of them are quite disagreeable. Most of >his are. But not all of them, as you well know. Perhaps he makes you feel uncomfortable, in which case don't reply to him. Your choice. But those of us who feel he has something to say, and/or don't feel in the least uncomfortable about having our buying decisions questioned, can choose for ourselves whether or not to reply. Our choice.
From: Alfred Molon on 8 Jun 2010 14:09 In article <hui5uq$tvv$1(a)news.eternal-september.org>, David J Taylor says... > One lens move. Focus done. Under ideal conditions. But in low light or in the tele range also phase AF hunts for a while until it locks. -- Alfred Molon ------------------------------ Olympus E-series DSLRs and micro 4/3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site
From: David J Taylor on 8 Jun 2010 14:28 "Alfred Molon" <alfred_molon(a)yahoo.com> wrote in message news:MPG.2678a5d3672342c598c31c(a)news.supernews.com... > In article <hui5uq$tvv$1(a)news.eternal-september.org>, David J Taylor > says... >> One lens move. Focus done. > > Under ideal conditions. But in low light or in the tele range also phase > AF hunts for a while until it locks. > -- > > Alfred Molon Tele works just fine on my Nikon camera and lenses. In situations where phase-detect hunts before lock, contrast-detect will likely fail completely. Cheers, David
From: SMS on 8 Jun 2010 16:39
On 08/06/10 11:28 AM, David J Taylor wrote: <snip> > Tele works just fine on my Nikon camera and lenses. In situations where > phase-detect hunts before lock, contrast-detect will likely fail > completely. In the cases where contrast-detect fails completely there is too little light to take the picture anyway. The flash is too weak and the pixels too small on P&S camera with a tiny sensor. Also there probably is no optical viewfinder to frame the photo in the low light. The failure of contrast detection in those circumstances is doing the user a favor. Now if it's a ZLR or something like the G11 with an external flash, where you probably could take the picture if you could focus, you could always try manual focus. The bottom line is to not try to use contrast-detect AF in very low light. Even if you can focus, the results will still suck. |