Search results for 'back focus' - page 2029
*ist DS focusing...???
I'm now trying to get into photography and have recently accquired a pretty cheap *ist DS with the 18-55mm lens... Having used it for a few days I've discovered that it quite often misses the focus, plus also being quite slow.. I'm thinking it's most likely just me rather than the camera... does a...
Posted by chaude on 22/05/2010 - 13:59
*ist DS focusing...???
What kind of focusing program do you use, do you select the focus point yourself, only use the centre focus spot or let the camera decide? If you do the last one that might be your problem.
Posted by Anvh on 23/05/2010 - 15:59
Focus adjustment on K20D
I have read a lot about lenses needing focus adjustment, so I am wondering whether I should adjust focus with my K20D. Is there an easy way to determine whether a lens is front/back focusing? Is there a database of adjustments needed with Pentax lenses or are individual cameras different? Thanks fo...
Posted by giofi on 24/05/2010 - 22:36
Focus adjustment on K20D
I have read a lot about lenses needing focus adjustment, so I am wondering whether I should adjust focus with my K20D. Is there an easy way to determine whether a lens is front/back focusing? Is there a database of adjustments needed with Pentax lenses or are individual cameras different? Thanks fo...
Posted by chris_jl on 25/05/2010 - 00:32
Focus adjustment on K20D
I have read a lot about lenses needing focus adjustment, so I am wondering whether I should adjust focus with my K20D. Is there an easy way to determine whether a lens is front/back focusing? Is there a database of adjustments needed with Pentax lenses or are individual cameras different? Thanks fo...
Posted by johnwhit on 25/05/2010 - 07:13
Focus adjustment on K20D
Also I've found it exceptionally difficult to adjust accurately for lenses with focal length less than about 28mm (any hints gratefully accepted). The only thing I can think of is to place the focus chart as close as you can since the closer it is to the camera the shallower the dof would be.
Posted by Anvh on 25/05/2010 - 11:44
Focus adjustment on K20D
I would suggest using the test chart on the wall, the camera on a tripod and at 45 degrees to the wall (so the camera is dead upright). That's the way one Samsung/Pentax service manual shows their setup for focus calibration. (That is, rather than pointing down to a desk as in the link ;) ) It...
Posted by MattMatic on 25/05/2010 - 11:59
Focus adjustment on K20D
Thanks to all of you for your help and suggestions. Now i have some work to do! Giorgio
Posted by giofi on 25/05/2010 - 18:30
K20D 'Chugging' - Help!!!!
The noise definately sounds like the sensor moving around, try doing a sensor clean and see what happens. But it does need to go back for repair or replacement, personally I would want the latter so I would insist on that from the supplier first.
Posted by fatspider on 26/05/2010 - 09:39
K20D 'Chugging' - Help!!!!
Well I sent it back to the shop as requested. I didn't hear anything for a few days, so I enquired if they had received it. They confirmed they did. A day after they sent email correspondence with Pentax. The original salesman (not the more sympathetic colleague I had spoken to) wrote to Pentax ...
Posted by DrOrloff on 04/06/2010 - 20:59
Macro tubes, idiot guide please
OK, I have macro tubes and put the Nokton on the front , K-7 on the back. How do I get it to close the aperture? It seems to be shooting wide open and the image is soft. It might be a stupid question. I have it in Manual exposure mode. Thanks
Posted by dougf8 on 26/05/2010 - 07:26
Macro tubes, idiot guide please
Does sound like there's a problem with your tubes - try the tube with the kit lens instead of the Nokton, see if there is any communication or not. I have an old Vivitar x2 TC with the electrical contacts as well as the mechanical lever, but when it came (for £5!) it didn't work and said F--, bu...
Posted by flossie on 26/05/2010 - 08:36
Macro tubes, idiot guide please
Thanks folks. You are better than google or wiki. OK Nokton has aperture setting and A. Set to F8. Scenario is as Matt lists 2. Finger linkage to control aperture (no contacts). Putting the lens on F8 in to M mode. Press the green button and whizz burr , hey presto sounds like its doing...
Posted by dougf8 on 26/05/2010 - 11:57
Macro tubes, idiot guide please
The addition of the right tube will not affect it at all except:- You will lose AF if the tubes do not have an AF screw coupler, and You will of course lose infinity focus, as with any tube. Otherwise, job done. I can recommend Kenko tubes but you might have trouble finding them. I don't t...
Posted by Mannesty on 26/05/2010 - 15:08
Macro tubes, idiot guide please
Ok Doug :D Got the tube today - it's all fine :) I think there was a misunderstanding about using the aperture... Let me give a complete guide: 1. Manual tubes, no linkage, no contacts. You have to turn the aperture on the lens to wide open to focus, and manually turn the aperture on the lens...
Posted by MattMatic on 01/06/2010 - 14:25
Macro tubes, idiot guide please
OK folks, Matt has replicated the tube issue and has identified (I hope )the reason. Once a fix has been tested we can reveal the problem. The probable cause is the K-7 being too clever by half. (thankfully my idiocy is back to normal levels).
Posted by dougf8 on 02/06/2010 - 09:34
wearing glasses and shooting...
Since i've been using a dslr i've been encountering this problem...i wear glasses, thick, wide plastic frame which always seems to get into my way when i'm looking into the viewfinder...(no i can't wear contacts, my eyes are too rubbish) It's okay when i'm on autofocus, but i seem to struggle to de...
Posted by chaude on 28/05/2010 - 00:04
wearing glasses and shooting...
No-one has asked the big question, so I will: Chaude - are you long or short sighted? If long sighted: - If you came from digital compacts to DLSRs, you used auto-focus and held the camera and hence the screen at arms length. Then you had no problem seeing the shot. - If you came from Range...
Posted by DoctorJeff on 29/05/2010 - 10:27
wearing glasses and shooting...
i'm pretty badly short sighted as well as astigmatic, i think the main problem is due to my big fat glasses that adds a bit of distance in between and making it harder to see. when i see it the image is clear but then using manual focus is still hard either way...
Posted by chaude on 29/05/2010 - 12:12
wearing glasses and shooting...
i've set the viewfinder dioptre. I think the main problem for me is the light that gets in cuz of my big fat glasses, so the eyecup M's shape would allow me to stick my eye right up to it. anyway I'd probably be seeing if there's anything around to fit it, if not the eyecup might just go back onto e...
Posted by chaude on 04/06/2010 - 12:30
