Search results for 'back focus' - page 758
Pentax-F 100mm 2.8 Macro?
Only the DA lenses will focus manually whilst in AF, and it is a very useful feature. The F and FA macro lenses are very big and very heavy compared with the DA, but they are superb performers.
Posted by johnriley on 09/03/2009 - 22:48
Rikenon 1.7/50
I've taken several test photos with the Rikenon 50mm f2 and Pentax 18-55mm MK2 kit lens at 50mm. I have yet to see one where the Kit lens come close. I leaned over the garden fence this morning and took several more at f5.6 1/500sec at ISO200. I checked all the Kit lens photos and they look i...
Posted by andrewk on 16/03/2009 - 13:42
Rikenon 1.7/50
Maybe the kit lens has a problem around 50mm. That flaring/diffusion certainly looks odd for a MC lens. Mines only the Mk1 but I've never had any problems with it except it's a bit soft on anything beyond 100m away. I've just checked the f/1.7 focus on a focus chart at about 500mm and it's within...
Posted by shim on 17/03/2009 - 14:26
Rikenon 1.7/50
Thanks after seeing that it probably is just a result of it being wide open. I'm sure it would disappear when the lens is stopped down. Not really a fairtest, but the 50mm should be better than the kit lens anyway. I tested mine at 4m and it seems OK.... just don't know why it was so bad yesterda...
Posted by shim on 17/03/2009 - 18:58
Rikenon 1.7/50
I took this shot hand-held (anti-shake switched off), in the fog, about half an hour ago. It was taken, about 4m from the tree, as a JPEG at f5.6 1/200sec ISO400, using a K200D with Rikenon f2 50mm. As the lighting in the fog was very flat, I used levels in Photoshop 7 to improve it some, but adde...
Posted by andrewk on 18/03/2009 - 12:00
300mm lenses
And may I ask you how much would you ask for the 300/2.8 A*? Also, after this disappointment with A* 300/4 I am a bit cautious. It gives an impression of a classic soft portrait lens: soft image superimposed over a sharp one. Shooting squirrels in the backyard I can see every hair, but a colored hal...
Posted by maxnovikov on 12/03/2009 - 00:01
300mm lenses
Max, have you eliminated possible AF problems with your "soft" lens by trying manual focus bracketing (repeated attempts with small manual adjustments of focus), or trying AF Adjustment if K20D? (Preferably using a tripod). I can't offer any specific advice on 300mm F4 or F2.8 lenses. Such long l...
Posted by iceblinker on 12/03/2009 - 00:23
300mm lenses
I have the DA*300mm and it's beautiful. Sharp from wide open. Highly recommended. I used to have the old Tamron AD2 300mm f/2.8, and while it was a great lens, and was very sharp once stopped down a bit (and if I got it in focus), it did suffer from aberations, purple fringing etc. The DA* doe...
Posted by Daniel Bridge on 12/03/2009 - 00:25
300mm lenses
A* 300/4 is a manual focus lens to begin with. Yes, I do have problems focusing but since I shoot 3D objects even if I miss a perfect focus on the squirrel's eyes I can still identify the perfect focus plane on the body and pixel-peek the fur. And it is less then perfect, as I've said.
Posted by maxnovikov on 12/03/2009 - 00:27
Pentax 17-70 Quick-Shift Manual Focus?
Hello, all. I've just taken delivery of the SMC Pentax DA 17-70 f4 AL[IF] SDM lens. (I need a tea-break after writing that). I read a review stating: "Thanks to a Quick-Shift system, manual focus override is instantly possible in Single-Shot AF mode". My lens doesn't appear to have any qu...
Posted by salixarbour on 12/03/2009 - 11:47
Pentax 17-70 Quick-Shift Manual Focus?
it does not have a switch i think it means you can manual focus without switching the camera to manual. that's what happens on my k10
Posted by bforbes on 12/03/2009 - 11:52
Pentax 17-70 Quick-Shift Manual Focus?
It means you can turn the focus ring manually even when the lens and body are in "AF" mode. So, you can half-press and get the camera to focus, then hold while you adjust the focus ring manually ;) Matt
Posted by MattMatic on 12/03/2009 - 12:12
Pentax 17-70 Quick-Shift Manual Focus?
Many thanks, Matt/Barrie. Thanks for that info. I does seem an odd thing to perhaps want to do, then again, maybe that's my inexperience showing. I read that the turn/travel in the manual focus ring is so short/sensitive that it makes manual focusing difficult anyway. Having read the reviews,...
Posted by salixarbour on 12/03/2009 - 12:33
Pentax 17-70 Quick-Shift Manual Focus?
It sounds right, so I wouldn't worry. The Quick Shift system is actually very useful when fine tuning macro shots. I used to use manual focus only for close up shots, but now use AF and adjust as required manually. It is more efficient for still life subjects.
Posted by johnriley on 12/03/2009 - 12:36
Pentax 17-70 Quick-Shift Manual Focus?
It sounds right, so I wouldn't worry. The Quick Shift system is actually very useful when fine tuning macro shots. I used to use manual focus only for close up shots, but now use AF and adjust as required manually. It is more efficient for still life subjects. Could'nt agree more John :wink:
Posted by Clarky on 12/03/2009 - 12:49
Pentax 17-70 Quick-Shift Manual Focus?
My manual focus ring is quite light to the touch/easy to turn/more so than my 18-250. Does that seem about right? Yeah it's OK. mine feels as if it's not moving anything it's so light
Posted by bforbes on 12/03/2009 - 13:41
Pentax 17-70 Quick-Shift Manual Focus?
Thanks to all. That makes me feel better. I did so want a little MF/AF switch though! :-) Regards. Alan.
Posted by salixarbour on 12/03/2009 - 13:58
Pentax 17-70 Quick-Shift Manual Focus?
I did so want a little MF/AF switch though! Two options: 1) Switch to MF on the body 2) Use the custom menu to turn off "Focus on half-press" and just use the dedicated "AF" button on the back. I use option 2 - kind of "Auto focus on demand". Much prefer it to anything else ;) Matt
Posted by MattMatic on 12/03/2009 - 15:02
Pentax 17-70 Quick-Shift Manual Focus?
I did so want a little MF/AF switch though! :-) You need the DA* 16-50 for that!
Posted by beakynet on 12/03/2009 - 15:45
Pentax 17-70 Quick-Shift Manual Focus?
Many thanks, Matt/Barrie. Thanks for that info. I does seem an odd thing to perhaps want to do, then again, maybe that's my inexperience showing. I read that the turn/travel in the manual focus ring is so short/sensitive that it makes manual focusing difficult anyway. Having read the reviews,...
Posted by RichardDay on 16/03/2009 - 10:23
