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Forum: Pentax K-30 & K-50
03-07-2015, 03:49 AM
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You can try if disabling the image-preview does the trick.
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Forum: Troubleshooting and Beginner Help
03-07-2015, 02:59 AM
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@Adam: I know that the camera does not stop down during focusing and that it "should" not affect the focus. But for some reason it does with me.
@vonBaloney
I am talking only about PDAF!
If i use CDAK all is fine.
Not having a Focus test chart at hand I tested it with my tilt-able PC-screen.
The distance between camera and target is approx. 70cm.
The BF you see on the photos relates to roughly 1-2cm.
I'm not having problems with the consistency of my focus with the DA*55. Of all my lenses it is for sure the one with the most exposures taken, so i got quite some experience with it ;) .
As long as i keep above 1:2.5 or below 1:2.8 all the time, my shots will be consistent throughout the whole set.
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Forum: Monthly Photo Contests
03-06-2015, 05:32 PM
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At the end of the station platform I was presented this mesmerizing view.
No tripod, only myself on my knees to get as close as possible to the ground without losing my balance with the train leaving the station.
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Forum: Winners' Showcase
03-06-2015, 05:25 PM
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Disturbingly great... Nominate
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Forum: Troubleshooting and Beginner Help
03-06-2015, 05:22 PM
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Hi there,
I'm new to this forum and english isn't my native language, so please excuse my bad english. ;)
I've come to find a rather unpleasant behavior of my DA*55mm, which is:
It seems to have two sets of focal-lengths settings written somewhere in it's lensrom (or wherever this information is stored).
If I use the focus-correction to be perfectly true for apertures 1:1.4 - 1:2.5 then it will have a significant backfocus (~30cm for 4m distance) for 1:2.8 and smaller.
When I set the camera to focus on 1:2.5, then disable the AF and change to 1:2.8, the focus will be 100% true. Should I change the aperture from 1:2.5 to 1:2.8 and then activate the AF again, the camera will change the focusing and i will get a blurry picture as a result.
I've already tried out 5 different Pentax cameras (3 of my own - K-r, K-30 and K-3 - as well as 2 of a friend - K-5iis and K-3) and got the same result on each camera.
Has anyone else noticed this kind of behavior?
I've already tried sending the lens in for fitting, but they were unable to fix it. :/
I've attached 2 photos from my test-runs. The camera was not moved in between shots and both times I turned the focus to infinity before pressing the shutter for focusing, so it had to focus fresh.
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