Search results for 'back focus' - page 1106
F & FA lens focus speeds
F 70-210mm up there with the best and faster AF then the newer lenses.:D Thanks Matty, I've heard good things about the F70-210. Hadn't realised focus speed was one of them though.
Posted by RJ on 21/09/2013 - 16:08
F & FA lens focus speeds
F70-210 is really speedy and great optics to boot :) The newer lenses, like the 55-300, make a lot of noise but not very quick. The 50-200WR was a lot better than the 55-300 though. The 18-55WR seemed okay too, quite nippy and no fuss.
Posted by Russ on 21/09/2013 - 16:12
F & FA lens focus speeds
the Fs tend to be fast, I suspect because they're designed to work with the very early SAFOX bodies, consequently the lenses are designed for auto focus speed almost at all costs.
Posted by Mongoose on 21/09/2013 - 18:11
F & FA lens focus speeds
the Fs tend to be fast, I suspect because they're designed to work with the very early SAFOX bodies, consequently the lenses are designed for auto focus speed almost at all costs. I don't understand then why Pentax didn't continue with the fast auto focus speeds when they developed the FA and DA ser...
Posted by RJ on 21/09/2013 - 18:29
F & FA lens focus speeds
F70-210 is really speedy and great optics to boot :) The newer lenses, like the 55-300, make a lot of noise but not very quick. The 50-200WR was a lot better than the 55-300 though. The 18-55WR seemed okay too, quite nippy and no fuss. So the F70-210 is faster than the 50-200WR?
Posted by RJ on 21/09/2013 - 18:30
F & FA lens focus speeds
F70-210 is really speedy and great optics to boot :) The newer lenses, like the 55-300, make a lot of noise but not very quick. The 50-200WR was a lot better than the 55-300 though. The 18-55WR seemed okay too, quite nippy and no fuss. So the F70-210 is faster than the 50-200WR? Have owned and...
Posted by MattyH on 21/09/2013 - 20:00
F & FA lens focus speeds
The focus on the F 70-210 used to worry me, I'd press the button and it felt (and sounded) as though it was about to launch the front element at the subject I was focusing on :shock: :D :shock: But they are still fine quality and fast focusing - I've owned more than I can remember and never been...
Posted by LennyBloke on 03/10/2013 - 08:29
F & FA lens focus speeds
It will depend on the lens in question and the type of construction. The SMC Pentax-DA 40mm f/2.8 Limited is blisteringly fast for example, presumably because the focusing has such a short throw. The 55-300mm has a lot more work to do.
Posted by johnriley on 03/10/2013 - 08:46
F & FA lens focus speeds
The focus on the F 70-210 used to worry me, I'd press the button and it felt (and sounded) as though it was about to launch the front element at the subject I was focusing on :shock: :D :shock: :lol::lol::lol::lol::lol: Yes its a bit brutal.
Posted by Russ on 03/10/2013 - 09:54
F & FA lens focus speeds
the Fs tend to be fast, I suspect because they're designed to work with the very early SAFOX bodies, consequently the lenses are designed for auto focus speed almost at all costs. I don't understand then why Pentax didn't continue with the fast auto focus speeds when they developed the FA and DA ser...
Posted by Mongoose on 03/10/2013 - 14:43
F & FA lens focus speeds
[quote:3496ace15f="Mongoose"]the Fs tend to be fast, I suspect because they're designed to work with the very early SAFOX bodies, consequently the lenses are designed for auto focus speed almost at all costs. I don't understand then why Pentax didn't continue with the fast auto focus speeds when the...
Posted by RJ on 03/10/2013 - 15:09
F & FA lens focus speeds
It will depend on the lens in question and the type of construction. The SMC Pentax-DA 40mm f/2.8 Limited is blisteringly fast for example, presumably because the focusing has such a short throw. The 55-300mm has a lot more work to do. Was just going to post this and saw John's reply. The da 3...
Posted by cabstar on 03/10/2013 - 15:12
F & FA lens focus speeds
It will depend on the lens in question and the type of construction. The SMC Pentax-DA 40mm f/2.8 Limited is blisteringly fast for example, presumably because the focusing has such a short throw. The 55-300mm has a lot more work to do. Was just going to post this and saw John's reply. The da 3...
Posted by RJ on 03/10/2013 - 15:16
F & FA lens focus speeds
[quote:3496ace15f="cabstar"] Seems to make sense in theory but my DA14mm f2.8 is slower to focus than the old F35-70 f3.5-4.5. My 55mm 1.4 is a dog at focussing, to the extent it isn't much used but I've never had concerns about my 14mm 2.8. On the K5 it gives no more trouble than the 18-135. i.e. ...
Posted by malcolmk on 03/10/2013 - 15:33
F & FA lens focus speeds
This morning two lens arrived in the post which i have just bought from fellow members, thanks guys,one is a pentax 18-55mm wr the other a pentax f 35-105mm. Just done a quick AF speed test on both of them set at 50mm,with a K5 on a tripod and focused on the same near and far, low contrast, low l...
Posted by MattyH on 03/10/2013 - 15:55
F & FA lens focus speeds
Well the da 14 is a hulking piece if glass 77mm front element and 11 elements behind it, its going to be slower to focus...
Posted by cabstar on 03/10/2013 - 21:18
F & FA lens focus speeds
this is a guess again, but because people didn't like the manual focus feel of the F series. Their focus is so loose and the throw is so short that they are very hard to focus manually. Also, people wanted features like non-rotating front elements and quick-shift focus clutches, all of which increas...
Posted by johnha on 03/10/2013 - 23:23
F & FA lens focus speeds
the SFX is much malligned in my opinion, sure it's ugly as sin, but it does the job nicely. I love the old manual focus assist function on the early AF systems, where it tells you which way to turn the lens when in MF mode.
Posted by Mongoose on 04/10/2013 - 09:01
F & FA lens focus speeds
Well the da 14 is a hulking piece if glass 77mm front element and 11 elements behind it, its going to be slower to focus... Took the words right out of my mouth :) Maybe the old girl drags the clutch too Pete
Posted by Transit on 06/10/2013 - 06:11
F & FA lens focus speeds
Has anybody compared the F50/1.7 & FA50/1.4? I'm thinking about upgrading my F 1.7 to the FA 1.4 and wondering if there's a difference in AF speeds. I've notice my newly acquired FA28/2.8 is much better damped for manual focusing than the F50/1.7 - almost to the point where I could potentially re...
Posted by johnha on 19/10/2013 - 12:04
