Search results for 'back focus' - page 2138
K&F fish eye adapter
Yes but apparently can't be removed as it everything out of focus always without it. Very strange.
Posted by sebas77 on 15/08/2017 - 18:12
K&F fish eye adapter
I've played with a few different versions of these . IIRC mine all have a series 7 thread & need a metric to series adapter. Stacking a stepping ring or two could perhaps make issues, but I managed to have a IR filter between the lens & the adapter without any noticeable focus issues. :) I did pi...
Posted by petrochemist on 15/08/2017 - 19:37
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
Strange lens effects
do some tests, those areas could simply be out of focus. At that focal range, you can expect to be everything in focus. So if you were focusing something else (like it seems it is the case) it's normal.
Posted by sebas77 on 16/08/2017 - 08:53
Strange lens effects
It looks like shallow depth of field. If you could post the second picture full size, we could give you a better assumption. It looks like the central bird is on focus, but having it full size would really help with a definitive "verdict".
Posted by pentaxian450 on 16/08/2017 - 12:18
Strange lens effects
Looking again at these #1 could be subject movement causing the blurred edge to the head (birds are like that!) #2 looks OK at web size #3 is presumably beyond the point of focus (if this is the whole frame and it should all be in focus you'd have a problem, but don't believe that to be the case h...
Posted by JAK on 16/08/2017 - 17:39
Strange lens effects
do some tests, those areas could simply be out of focus. At that focal range, you can expect to be everything in focus. So if you were focusing something else (like it seems it is the case) it's normal. correction: I meant you can't expect to be everything in focus
Posted by sebas77 on 16/08/2017 - 19:16
Strange lens effects
As soon as I saw the pictures I said to myself - Sigma lens. My 50-500mm used to be exactly the same, if the background is grass or similar then it comes out looking just like that ... as if the IS had thrown a wonky. Main subject was always fine though. Did have to send mine back because it w...
Posted by Mike-P on 16/08/2017 - 19:44
Strange lens effects
As soon as I saw the pictures I said to myself - Sigma lens. My 50-500mm used to be exactly the same, if the background is grass or similar then it comes out looking just like that ... as if the IS had thrown a wonky. Main subject was always fine though. Did have to send mine back because it w...
Posted by michaelblue on 17/08/2017 - 06:37
Strange lens effects
Yes still did It when it came back. I have seen the same thing on the Sigma 100-300mm f4 but to a lesser degree. I think it's just a "feature" of certain Sigma lenses.
Posted by Mike-P on 17/08/2017 - 18:15
Strange lens effects
michaelblue FWIW, which body, and what focus setting (spot, small area, large area, etc.), were you using ?
Posted by jeallen01 on 17/08/2017 - 21:28
Strange lens effects
michaelblue FWIW, which body, and what focus setting (spot, small area, large area, etc.), were you using ? I tried it on two different K5's and a K3ii. It's the same on all three. All with spot focus setting, it's worse at the longer focal lengths Here's two I took today at 290mm with the...
Posted by michaelblue on 17/08/2017 - 22:07
Strange lens effects
Michael Based on your last post, it appears to be the lens that is the issue as I had a similar one with my 100-300 F4 on 3 different bodies a couple of years ago. I took it (literally, I live not too far away!) to Sigma Imaging UK in Welwyn, and they then diagnosed the problem as being the lens A...
Posted by jeallen01 on 17/08/2017 - 22:32
Strange lens effects
In the AP I received yesterday, there is a letter from someone who sent a 7-8 yr old Sigma 70-200 f2.8 HSM to Sigma Imaging UK for repair, but when, having sent it back to Japan Sigma Imaging UK were told that the parts were no longer available, they sent him a brand new 70-200 f2.8 HSM OS for just...
Posted by jeallen01 on 20/08/2017 - 21:13
Irix ND Gels
Gels are often used for control of lighting rather than for imaging through. For lighting the scratches won't make any difference. If they where sold as lighting gels I'm not convinced you'd have any comeback, if their listing suggests they can be used for imaging then you have good grounds IMO. ...
Posted by sebas77 on 22/08/2017 - 16:24
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
Dismantle the top glass of Tamron 70-200 2.8
I would leave well alone. The glass could be put back decentred and if you get the torque wrong when refixing you could distort the shape of the element.
Posted by johnriley on 21/08/2017 - 17:18
Forum search
Site searches rarely work. SKY can't even handle passwords properly..... They seem to lose mine every time I try to log on. :lol: It took years for Firefox to handle two words or more and Amazon's is very poor. I remember when the BT Phone directory was case sensitive and you could search the ...
Posted by Algernon on 15/11/2017 - 11:45
A question about prints...
Have you compared the images that came back with a border to the images submitted. Should be able to tell from that where the problem is. Nothing to do with your camera.
Posted by derek897 on 16/11/2017 - 10:39
A question about prints...
Have you compared the images that came back with a border to the images submitted. Should be able to tell from that where the problem is. Nothing to do with your camera. Yes, and this was my issue. There are no borders on my uploaded pics. They wanted me to crop or shrink to fit, which I didn't do,...
Posted by Kevriano on 16/11/2017 - 11:46
