Originally posted by runjmb Has the K20D improved its autofocus? I have been finding myself in some situations where having better AF would certainly benefit me.
As an owner of the both a K20, and a K100, I can say that, yes, the K20 is definitely faster, and so it should be with its high voltage lithium battery.
Which brings me to the other thing - one day, on a whim I tried Lithium AAs (non-rechargable) in my K100, and was shocked to find the AF was noticably faster compared to the NiMH AAs I was previously using. This makes a lot of sense, actually, when you consider that the Lithium AAs are typically providing a voltage which is 0.3V higher, per battery...
Originally posted by kthung I've never tried an SDM lens for pentax, but I was wondering if for everyone else, when autofocusing, does the camera go past the focus point slightly, backwards past the focus point again slightly and the lock in, essentially taking three turns to lock focus?
Are SDM lenses any different? I only have a K100DS so I'm also interested if the K20D is better as well.
I can only speak for the 16-50, but it can hunt in exactly the way you describe in very poor light. I've noticed it seems to happen much less, than I used to notice the kit lens doing. I presume this is mostly related to the larger maximum aperture, since I haven't noticed that a DA 40 hunts much on either camera.
Originally posted by rparmar But was it accurate? Since you mention the tortoise, "slow and steady wins the race" is perhaps an apropos phrase.
This isn't exactly a fair criticism, but I've been quietly thinking this about a friend's Canon (400D). It seems to focus very quickly, but some of the time when she shows me full sized pictures I see something isn't quite right with the focus. It's possible that it's user error, or just a really poor kit lens, I guess.... but I do wonder...