Search results for 'back focus' - page 1892
Fine focus adjusted but still back focuses!!!
Trouble is I think, I'm old school, I just can't see me shooting by using the rear screen or checking focus using live view. I'm still thinking that the compromises with a zoom may not be worth the faff, they had their issues in film cameras also. Would a prime give me these issues? Is it ok to acce...
Posted by johnducguz on 07/02/2019 - 20:15
Fine focus adjusted but still back focuses!!!
If that zoom lens is put of calibration, contact Sigma and ask if it is possible to get it recalibrated. https://www.sigma-imaging-uk.com/repairs-support/ If its duff they may replace it for you or some other suggestion.
Posted by JAK on 07/02/2019 - 21:18
Fine focus adjusted but still back focuses!!!
Trouble is I think, I'm old school, I just can't see me shooting by using the rear screen or checking focus using live view. I'm still thinking that the compromises with a zoom may not be worth the faff, they had their issues in film cameras also. Would a prime give me these issues? Is it ok to acce...
Posted by derek897 on 07/02/2019 - 22:11
Fine focus adjusted but still back focuses!!!
The issue is brought about by using autofocus and an optical viewfinder. You're seeing a view through the lens, and not what the sensor will see when the mirror is folded up and the shutter is opened. The autofocus process has to be adjusted to precisely match where you are pointing the camera, so...
Posted by richandfleur on 07/02/2019 - 22:50
Fine focus adjusted but still back focuses!!!
Second is an issue with the lens itself and/or the calibration. Again it takes a bit of time to correctly calibrate the lens adjustment, so don't rush this. Problem is the K-5 doesn't recognise the lens, other than its a Sigma. Sigma have used the same code number for a variety of different lenses...
Posted by JAK on 07/02/2019 - 23:47
Fine focus adjusted but still back focuses!!!
Problem is the K-5 doesn't recognise the lens, other than its a Sigma. Thanks for this info.
Posted by richandfleur on 08/02/2019 - 00:16
Fine focus adjusted but still back focuses!!!
The image exif with the Sigma is Date 2019-02-02 14:12:59 +0000 Make PENTAX Model PENTAX K-5 Software Adobe Photoshop Camera Raw 9.10.1 (Windows) Exposure Time 0.0010s (1/1000) Aperture ƒ/2.8 Exposure Manual ISO equivalent 100 Exposure Bias none Metering Mode Matrix Flash Fired No (enforc...
Posted by JAK on 08/02/2019 - 00:42
Fine focus adjusted but still back focuses!!!
(didn't I suggest that earlier??) Stay with us man, your input is much appreciated.
Posted by richandfleur on 08/02/2019 - 02:40
Fine focus adjusted but still back focuses!!!
I have a Sigma 70-200mm f2.8 which my K5 does not like, I had a lot of out of focus problems with it and I got all kinds of weird camera shake (even using a tripod), all other lenses are fine with the K5 (including a Sigma 10-20mm) I now have a KP and it works perfect with the Sigma 70-200mm (as it...
Posted by michaelblue on 08/02/2019 - 08:12
Fine focus adjusted but still back focuses!!!
i had a sigma 70-200 f2.8 and would not work with my k5iis again focus problems now have a Tam 70-200 f2.8 and works as it should
Posted by reso on 08/02/2019 - 16:33
Fine focus adjusted but still back focuses!!!
Jak, I think you make the most relevant point. Independents have always been cheaper than body brand lenses & maybe this has proved the adage 'you get what you pay for'. Much as I appreciate the helpful comments, at the end of the day I want to point the camera, have it focus accurately & do so in a...
Posted by johnducguz on 08/02/2019 - 18:02
Fine focus adjusted but still back focuses!!!
Nothing wrong with fine focus on Pentax's own lenses... as far as I know all of them that support automatic focus can be fine tuned (up to 20 lens types.) As that doesn't always work for Sigma lenses given their use of generic lens type codes they instead market a dock which allows lens adjustment...
Posted by JAK on 08/02/2019 - 22:20
Fine focus adjusted but still back focuses!!!
I fully take JAK's point and I agree with him regarding the difficulty in applying fine focus settings, however, I have a slightly different point to make about Sigma lenses vs. Pentax lenses. I've owned (and still own) a fair few Sigmas, 50-500, 150-500, 50mm Macro, 105mm Macro, 70-300, 17-70 f2....
Posted by davidstorm on 08/02/2019 - 22:32
Fine focus adjusted but still back focuses!!!
I've never suggested there's a major issue with Sigma lenses, just that Pentax's AF fine tuning system often doesn't support them (for reasons already stated.) I own several including their 8-16mm rectilinear which has nothing comparable elsewhere and does what it does well (apart from having the a...
Posted by JAK on 08/02/2019 - 23:19
Fine focus adjusted but still back focuses!!!
So here's a shot with the 24-70 Sigma on my K10 body. As it's raining I shot from indoors focusing on the end of the bench. Hopefully you can see the berries, 1-2ft behind the focus point, are sharper, those not moving anyway. The bench end definitely aint sharp. So conclusion is.....duff lens!! Kin...
Posted by johnducguz on 10/02/2019 - 09:48
Fine focus adjusted but still back focuses!!!
disable the focus from the shutter release and set up the AF back button to perform it , can't remember how to do it on K5 but there will be someone on here or a youtube video that will show you. that will eliminate any chance of the camera trying to refocus as you press the shutter release also a...
Posted by redbusa99 on 10/02/2019 - 10:25
Fine focus adjusted but still back focuses!!!
So here's a shot with the 24-70 Sigma on my K10 body. Using single point AF for this ?
Posted by pschlute on 10/02/2019 - 10:31
Fine focus adjusted but still back focuses!!!
The camera looks to have focussed on the bush behind the intended target. As redbusa9 suggests turn off AF on shutter release and move it to the back button. Then focus first with the back button, recompose the shot and it doesn't matter where that point of focus ends up in the frame, the camera ...
Posted by JAK on 10/02/2019 - 12:08
Fine focus adjusted but still back focuses!!!
To add to what JAK (John) said, and the reason I asked if you used single point, is that if you use one of the auto focus point settings you are allowing the camera to choose out of a number of points where it will focus. If it thinks it finds more contrast in the branches/berries, that is where it ...
Posted by pschlute on 10/02/2019 - 12:35
Fine focus adjusted but still back focuses!!!
.. and to add to that, sometimes one has to press the AF button several times before it focusses where one wants it to. People often blame focussing issues on the camera when the reality is the camera has no idea what the person taking the photo wants in focus and what they want out of focus. The ...
Posted by JAK on 10/02/2019 - 14:16
