Search results for 'back focus' - page 1037
suggestions for walkaround lenses
The last time I was walking around in a city, Edinburgh, as it happened, I had an 18-135 on the camera. When I got the pictures on to the computer, I decided that next time, in a similar situation, it will be the 10-20. 10-35 would be even better, but 18 was far too long in most cases. For th...
Posted by ChrisA on 12/04/2012 - 22:08
Fast focus for baby shots
So what's the fastest focusing lens in the 18-50mm range. Can be a prime or a zoom. My experience with SDM is that it's wonderful IQ but focusing is slow as crap. I've had a 16-50mm DA*, 18-50mm f2.8 siggy, 30mm f1.4 siggy (non HSM), 50mm FA 1.4, 35mm DA 2.4, and I'm sure I'm missing one more in ...
Posted by whelmed on 13/04/2012 - 21:53
Fast focus for baby shots
The 18-135 is the fastest focusing Pentax lens that I've encountered, by a significant margin. The 35mm DA 2.4 is hardly slow, and neither is the 50mm FA 1.4. The 17-70 is fairly fast, I find, despite being SDM. None of these is as quick as the 18-135. If it's not fast enough, you need to ...
Posted by ChrisA on 13/04/2012 - 22:01
Fast focus for baby shots
I would work the other way round and slow her down....brandy on the dummy?
Posted by JamieT on 13/04/2012 - 22:03
Fast focus for baby shots
The fastest focussing lenses are the SDM ones. SDM is nothing to do with IQ, it stands for 'Supersonic Drive Motor.' Have you tried the DA 17-70? That focusses pretty quickly on a K-5 and is SDM. All lenses will struggle in low light situations though but I'm surprised you had a problem with t...
Posted by JAK on 13/04/2012 - 22:07
Fast focus for baby shots
The fastest focussing lenses are the SDM ones. SDM is nothing to do with IQ, it stands for 'Supersonic Drive Motor.' The fastest focusing lenses are the ones with the shortest focus throw. The SDM lenses are actually mostly slower than screw drive .. the 16-50mm, 50-135mm, 60-250mm and 55mm a...
Posted by Mike-P on 13/04/2012 - 22:17
Fast focus for baby shots
The SDM lenses are actually mostly slower than screw drive .. the 16-50mm, 60-250mm and 55mm are particularly bad .. the 300mm isn't much better. The 18-135mm is fast .. as is the DA 40mm. 18-135 is DC, not SDM, as Gwyn, I think, pointed out to me when I made the same mistake. :) The other thi...
Posted by ChrisA on 13/04/2012 - 22:21
Fast focus for baby shots
Maybe it's my comparison point - I used a friends D700 with a 24-70mm f2.8 it it was like it thought for me. Push down and wham, perfect. Same with another friends Canon 60D who had the 24-70mm L series, which I found an interesting FL on a crop body, but same result. The DA* I had with SDM would...
Posted by whelmed on 13/04/2012 - 22:22
Fast focus for baby shots
Maybe it's my comparison point - I used a friends D700 with a 24-70mm f2.8 it it was like it thought for me. Push down and wham, perfect. Same with another friends Canon 60D who had the 24-70mm L series, You're hardly comparing like with like :) If lightning fast AF is your main requirement, y...
Posted by ChrisA on 13/04/2012 - 22:25
Fast focus for baby shots
The only problem is that to upgrade to a FF / top end glass in canikon is that it's serious serious cash. Basically, I've got 500-600GBP burning a hole in my pocket at and I'd like to get something part way there :-) If I had 3000-4000 then I'd ponder Canikon.
Posted by whelmed on 13/04/2012 - 22:29
Fast focus for baby shots
If I want focus speed I use my 50D now. Pentax have got better with the K-5 but it's still no match for even one of Canons 4/5 year old bodies.
Posted by Mike-P on 13/04/2012 - 22:33
Fast focus for baby shots
The only problem is that to upgrade to a FF / top end glass in canikon is that it's serious serious cash. Basically, I've got 500-600GBP burning a hole in my pocket at and I'd like to get something part way there :-) If I had 3000-4000 then I'd ponder Canikon. Well I'd say that the 18-135 on the K...
Posted by ChrisA on 13/04/2012 - 22:34
Fast focus for baby shots
I would work the other way round and slow her down....brandy on the dummy? Yeah! big can of freezer spray!!!
Posted by Smeggypants on 13/04/2012 - 22:37
Fast focus for baby shots
If I want focus speed I use my 50D now. Pentax have got better with the K-5 but it's still no match for even one of Canons 4/5 year old bodies. Yup, truth might hurt for the "Pentax can do no wrong!" Sycophants though. :) I'm still not buying a Canon though. :)
Posted by Smeggypants on 13/04/2012 - 22:38
Fast focus for baby shots
The fastest focussing lenses are the SDM ones. John No they are not sadly. Quite the opposite in fact.
Posted by Smeggypants on 13/04/2012 - 22:41
Fast focus for baby shots
Re the 18-135mm, there was a fairly recent review (last 6-12 months) that made me cringe so I am quite gun-shy on it. It was from a respectable site as well, though the name escapes me right now. The IQ on the K-5 is on par with most of the Canikon FF bodies I've seen, with the obvious problem b...
Posted by whelmed on 13/04/2012 - 22:46
Fast focus for baby shots
I believe SDM was designed to be quicker. Anyhow, another thought, you know where the baby is while considering to take the photo. Pre-focus the camera on the baby ready so you can just press the shutter at the opportune moment. No focussing delay at all. With a manual focussing lens camera in th...
Posted by JAK on 13/04/2012 - 22:50
Fast focus for baby shots
Re the 18-135mm, there was a fairly recent review (last 6-12 months) that made me cringe so I am quite gun-shy on it. It was from a respectable site as well, though the name escapes me right now. It was probably . As I said, edge sharpness at anything longer than about 50 is pretty poor. B...
Posted by ChrisA on 13/04/2012 - 22:56
Fast focus for baby shots
The problem with pre-focusing is they move front and back so depending on the DOF that 1 inch is enough to bright them out of the depth of field. Again, I can step down by using a flash or upping the iso, but I'm kind of bokeh mad :-) hence the lenses I own (siggy 30mm f1.4, 70-200 f2.8 and my 400...
Posted by whelmed on 13/04/2012 - 23:00
Fast focus for baby shots
I believe SDM was designed to be quicker. This sort of statement is far too simplistic, and consequently uninformative. As Mike said earlier, it's also about the length of the focus throw. Obviously, a focus ring that has to rotate further, will take longer, all other things being equal. Th...
Posted by ChrisA on 13/04/2012 - 23:00
