Search results for 'sensor cleaning' - page 625
M and A lenses with HSS flashes on K1
Yes, there's a fair bit of stuff on HSS there .... the Guide is focussed on the Pentax flash system, so it deals mainly with automatic P-TTL mode HSS, as well as the reasons that HSS is needed, and the limitations. Manual HSS is something newer, and still a rarity .... the Cactus RF60 is the only ho...
Posted by McGregNi on 11/04/2017 - 13:50
Exposure problems with Irix 15mm lens
Hi Paul, can't comment on that particular lens but have had similar experience before with a contact problem, f stop would suddenly disappear and show -- and aperture would be wide open. This would happen for a second only and was hard to spot. I'd try cleaning the contacts as a starting point. ...
Posted by derek897 on 06/05/2017 - 16:12
Exposure problems with Irix 15mm lens
Thanks Derek, I will try cleaning the contacts. The irix does not have an aperture ring. it seems a well made lens, nice feel to it and some clever design features. I hope it is a simple fix too! Paul
Posted by phb on 06/05/2017 - 17:10
Exposure problems with Irix 15mm lens
Cleaning the contacts on the lens and the camera body, with a dry soft cloth, is the best place to start. If there's a lens fault, then it's a new lens, so getting it replaced or fixed under warranty won't be a problem.
Posted by johnriley on 06/05/2017 - 18:14
Out of focus or blur?
Agree with the firmware disable comment above. I'd be pretty annoyed if the SR caused known issues at certain shutter speeds, and this was allowed to proceed by the firmware. Bottom line is, if there is an issue at times then I'd like to know about it, but if there is I'd also have expected Pentax...
Posted by richandfleur on 28/06/2017 - 01:44
K-r and Energizer lithium AA batteries
I have just bought some Energizer batteries for the K-r as my Eneloops were giving less than 200 shots. When I put them in and switched on the info screen came up but when I depressed the shutter release the sign came up 'Batteries depleted'. Since then I have tried everything possible to find out ...
Posted by Pikaholic on 10/07/2017 - 20:32
IR / Mono anomaly
It looks like Newton's rings. However, it could be a diffraction effect from the sensor combined with the sun being just out of shot? Try using the AA filter simulator in similar circumstances. Alternatively, it could be from over adjusting levels. This usually results in posterisation effects. I...
Posted by johnriley on 12/08/2017 - 07:51
IR / Mono anomaly
Thanks all for the above. Could be, Jak. I've tried other routes in Elements but it's still there, to a greater or lesser degree. Newton's Rings as in slide glasses, John? Would that not have to be on the final image plane, the sensor? It's not on the jpeg before processing.... Sun was over t...
Posted by coker on 12/08/2017 - 13:37
Strange lens effects
Are you using both optical and sensor shake reduction systems simultaneously?
Posted by JAK on 15/08/2017 - 13:48
Strange lens effects
Are you using both optical and sensor shake reduction systems simultaneously? Niether, no shake reduction at all. The first one was at 1/800th sec. 500mm, the second was at 1/800th sec. 440mm, the last one was 1/000th sec, 440mm. All were taken using a beanbag for support. I've even had this wh...
Posted by michaelblue on 15/08/2017 - 14:15
Dismantle the top glass of Tamron 70-200 2.8
there is some dust inside my Tamron that I would be better leave where it is. However I noticed that it could be quite simple to dismantle the top glass of the lens, cleaning it and put it back. Thoughts?
Posted by sebas77 on 21/08/2017 - 11:11
Back-Focus or my Eyes ? !!
Peter, the only true way to test this is on a tripod with a fixed subject (focus chart) in good light. However the K10 has no "official" way to change the AF adjustment (which would re-align on out of position sensor). There is a firmware hack if you want to look into it. Can you do some tests w...
Posted by pschlute on 29/11/2017 - 18:13
Optical triggering by K70 of AF360FGZ in slave (2) mode
Andrew, it sounds like you have done everything correctly to be able to say "in theory it should work" ....I agree that it should, as in Manual mode the K70 flash will not emit a pre-flash, therefore basic syncing on the main flash should occur. The only two things to double check are that the ...
Posted by McGregNi on 16/03/2018 - 16:06
Focusing problem
I photograph a lot of trains and use back button AF all the time. Was SR on? I have had some instances where shots in the middle of a sequence are soft (overall soft rather than just mis-focussed) which I blame on the SR still moving the sensor
Posted by StephenHampshire on 23/04/2018 - 09:10
Focusing problem
I photograph a lot of trains and use back button AF all the time. Was SR on? I have had some instances where shots in the middle of a sequence are soft (overall soft rather than just mis-focussed) which I blame on the SR still moving the sensor Yes, SR was on, when do you use SR and when do you not ...
Posted by sportyman531 on 23/04/2018 - 22:11
Focusing problem
I photograph a lot of trains and use back button AF all the time. Was SR on? I have had some instances where shots in the middle of a sequence are soft (overall soft rather than just mis-focussed) which I blame on the SR still moving the sensor I have been thinking of getting the DA* 50 -135 but the...
Posted by sportyman531 on 01/05/2018 - 19:36
Focusing problem
I photograph a lot of trains and use back button AF all the time. Was SR on? I have had some instances where shots in the middle of a sequence are soft (overall soft rather than just mis-focussed) which I blame on the SR still moving the sensor I have been thinking of getting the DA* 50 -135 but the...
Posted by StephenHampshire on 01/05/2018 - 20:49
Decentered sensor..
As you may be aware I have a surplus K-10. I decided to check it out and it appears that the sensor is out of alignment by about 2°. Has anyone else had this problem. Also noticed that when the SR is turned off the sensor still rocks and rolls. Anyone?
Posted by spinno on 10/05/2018 - 20:44
Decentered sensor..
OK issue has been resolved. I downloaded the debug file and corrected the focus issue. I read that some viewfinders are slightly out of kilter so it's not likely to be fixable as the parts aren't available anymore. I may or may not keep it, I'm giving it a run out this afternoon.
Posted by spinno on 20/05/2018 - 11:07
Decentered sensor..
My K10D bought from Jacobs in 2007 apparently had a twisted sensor. Others mentioned this on my gallery shots; one of the steam loco shots and the couple at the top of Snowdon. I didn't use PhotoME until a couple of years in but found that my first shot was about the 400-and-something-th shutter act...
Posted by pgweber on 20/05/2018 - 16:01
