Search results for 'back focus' - page 1038
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. If you were using a Pentax ME or similar manual focussing cameras, how would you have coped? John
Posted by JAK on 13/04/2012 - 23:04
Fast focus for baby shots
So - still left pondering the answer to feeding my current LBA lust. I suppose I also need to throw back into the mix that I love bokeh - thus my need for 2.8 or faster in a lens.
Posted by whelmed on 13/04/2012 - 23:05
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. If you were using a Pentax ME or similar manual focussing cameras, how would have coped? It would have been harder. But an ME costs £25. For £100...
Posted by ChrisA on 13/04/2012 - 23:06
Fast focus for baby shots
I believe SDM was designed to be quicker. This sort of statement is far too simplistic, and consequently uninformative. Sorry, apparently the SDM mechanism is claimed to provide smoother and quieter focusing, not faster. The word 'Super' means 'more than' so it sounds like it should be faster! It ...
Posted by JAK on 13/04/2012 - 23:07
Fast focus for baby shots
So - still left pondering the answer to feeding my current LBA lust. I suppose I also need to throw back into the mix that I love bokeh - thus my need for 2.8 or faster in a lens. So you basically want super-quick focusing, fast lenses, and not have to spend too much. Erm... :D
Posted by ChrisA on 13/04/2012 - 23:09
Fast focus for baby shots
[quote:3496ace15f="JAK"]I believe SDM was designed to be quicker. This sort of statement is far too simplistic, and consequently uninformative. Sorry, apparently the SDM mechanism is claimed to provide smoother and quieter focusing, not faster. [/quote] Ah well. Smooth and quiet, SDM certainly ...
Posted by ChrisA on 13/04/2012 - 23:10
Fast focus for baby shots
[quote:3496ace15f="whelmed"]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. If you were using a Pentax ME or similar manual focussing cameras, how would have coped? It would have been harder. But ...
Posted by JAK on 13/04/2012 - 23:11
Fast focus for baby shots
So - still left pondering the answer to feeding my current LBA lust. I suppose I also need to throw back into the mix that I love bokeh - thus my need for 2.8 or faster in a lens. So you basically want super-quick focusing, fast lenses, and not have to spend too much. Erm... :D I've got 700GBP b...
Posted by whelmed on 13/04/2012 - 23:13
Fast focus for baby shots
Given the amazing, precisely timed shots we see in the gallery of wildlife etc. I feel that it is more down to technique than anything else. If you just can't get the timing right, put the K-5 into moviemode and film a sequence that way. Select a sharp image from within that and you've got your phot...
Posted by JAK on 13/04/2012 - 23:29
Fast focus for baby shots
As an alternative solution, have you tried letting the focus track your baby using the AF.C setting? Much cheaper than a new lens if it works...
Posted by SkyRider on 14/04/2012 - 00:02
Fast focus for baby shots
Given the amazing, precisely timed shots we see in the gallery of wildlife etc. I feel that it is more down to technique than anything else. If you just can't get the timing right, put the K-5 into moviemode and film a sequence that way. Select a sharp image from within that and you've got your phot...
Posted by Smeggypants on 14/04/2012 - 02:50
Fast focus for baby shots
Can I conclude then that there is nothing that will be faster than my 35mm f2.4 then?
Posted by whelmed on 14/04/2012 - 10:31
Fast focus for baby shots
Can I conclude then that there is nothing that will be faster than my 35mm f2.4 then? A 126 Instamatic? It's fixed focus so no focus speed issues at all. :wink: John
Posted by JAK on 14/04/2012 - 11:19
Fast focus for baby shots
It still is true that SDM is nothing to do with IQ as said in the original post. John Actually that is not strictly true either. As Pentax only make their "professional range" with SDM and considering the price of them you would be quite within your rights to expect better IQ than a lens witho...
Posted by Mike-P on 14/04/2012 - 13:54
Fast focus for baby shots
It still is true that SDM is nothing to do with IQ as said in the original post. John Actually that is not strictly true either. As Pentax only make their "professional range" with SDM and considering the price of them you would be quite within your rights to expect better IQ than a lens witho...
Posted by JAK on 14/04/2012 - 17:29
Fast focus for baby shots
Don't wish to appear rude, but how on earth can a lens focussing system have any relation to a lens's optics? Easily. If the relationship is one of correlation, rather than causation.
Posted by ChrisA on 14/04/2012 - 17:57
Fast focus for baby shots
It's pretty simple I would say Pentax uses its "premium" SDM focusing motor for it's premium lenses which are supposedly the best they produce (given their price) Since they are the best lenses Pentax make is it not safe to say that the optics are therefore included in that premium upgrade or ...
Posted by Mike-P on 14/04/2012 - 18:02
Fast focus for baby shots
17-70 ? would say that was a totally valid answer, no matter how many times you try and justify your statement (which I believe at the start was saying SDM was for their fastest focusing lenses?). Already apologised for that - I had misunderstood the meaning of supersonic as used by Pentax. Thoug...
Posted by JAK on 14/04/2012 - 18:04
Fast focus for baby shots
17-70mm is better than both the 16-45mm and the 18-55mm kit lens, I believe it was bought out as an upgrade for the kit lens (having better optics) :wink: and to replace the 16-45mm which was already getting on a bit when SDM was first bought out. The 16-50mm is another level up because of it's fast...
Posted by Mike-P on 14/04/2012 - 18:09
Fast focus for baby shots
Optically the 17-70 (to me) is not quite as good as the the 16-45 but is a more convenient lens. It's certainly fast and quiet focussing, but not a pro lens. If you read Photozone's review of it it states The fast and near-silent ultrasonic AF is also a very welcome new feature. which is whe...
Posted by JAK on 14/04/2012 - 18:19
