Search results for 'back focus' - page 1083
All Rounder Lens - hit me with it.....
I, too, must sing the praises of the 17-70, an excellent performer on such a variety of occasions. I find it slightly obtrusive for street photography, where a small prime is less 'in your face' (quite literally). It would be nice it it were 2.8, but then it'd be bigger! Also be good to have it W...
Posted by Smeggypants on 17/04/2013 - 23:32
disaster
Just came back from a trip to Patagonia and looking over my shots on photoshop. To my shocking surprise all my shots taken with my new 55-300 pentax lens are out of focus. To the naked eye on the lcd screen they seemed fine but back home on the computer they are terrible. I have no idea why! All sho...
Posted by mattox on 17/04/2013 - 15:17
disaster
Sorry to hear that, did you test the lens and apply any required AF focus adjustment before using it?
Posted by Mannesty on 17/04/2013 - 15:20
disaster
Sorry to hear that, did you test the lens and apply any required AF focus adjustment before using it? how do I apply this focus adjustment?
Posted by mattox on 17/04/2013 - 16:07
disaster
Just came back from a trip to Patagonia and looking over my shots on photoshop. To my shocking surprise all my shots taken with my new 55-300 pentax lens are out of focus. To the naked eye on the lcd screen they seemed fine but back home on the computer they are terrible. I have no idea why! All sho...
Posted by Smeggypants on 17/04/2013 - 23:15
disaster
You have to be careful with the 55-300 as it is slow to focus so you need to keep it steady, but once it's focused it should be plenty sharp. It sounds like you have a front focus or back focus problem.
Posted by Jonathan-Mac on 18/04/2013 - 06:07
disaster
Sorry to hear that, did you test the lens and apply any required AF focus adjustment before using it? how do I apply this focus adjustment? I have a pentax k5
Posted by mattox on 18/04/2013 - 18:58
disaster
i will give this adjustment thing a go then and get back to you all. Thanks for the help everyone
Posted by mattox on 18/04/2013 - 19:03
disaster
David is right. The problem you seem to have had was exactly the same for me. I was given a UV filter when I bought the 55-300 and it would not focus. I took off the filter and the lens worked perfectly. Sorry to hear about your disaster.
Posted by darkskies on 19/04/2013 - 07:34
disaster
shit....really. the uv filter....mmmm that is an issue then. Will give these suggestions some tests and get back to everyone
Posted by mattox on 19/04/2013 - 11:15
disaster
so, just taken the camera through some tests: 3 shots at 300mm f5.8, f10, f22 with UV filter, 3 shots 200mm at the same f stops, then 6 shots again without the uv filter. The results very interesting. No noticable difference with or without Uv filter, but all shots taken at f5.8 through all focal le...
Posted by mattox on 25/04/2013 - 11:54
disaster
...all shots taken at f5.8 through all focal lengths noticeably out of focus. This is odd when you consider that the AF function is performed with the aperture wide open and once set, the lens elements shouldn't move. Have you checked the diaphragm to ensure you haven't got a stuck or missing ...
Posted by Mannesty on 25/04/2013 - 13:11
disaster
...all shots taken at f5.8 through all focal lengths noticeably out of focus. This is odd when you consider that the AF function is performed with the aperture wide open and once set, the lens elements shouldn't move. Have you checked the diaphragm to ensure you haven't got a stuck or missing ...
Posted by mattox on 25/04/2013 - 13:20
disaster
so, just taken the camera through some tests: 3 shots at 300mm f5.8, f10, f22 with UV filter, 3 shots 200mm at the same f stops, then 6 shots again without the uv filter. The results very interesting. No noticable difference with or without Uv filter, but all shots taken at f5.8 through all focal le...
Posted by gwing on 25/04/2013 - 13:21
disaster
Adjust to the right (+ closer) will make it sharper or more OOF? Neither, you are simply moving the plane of focus backwards or forwards so that the sharpest part is actually the point you are focussing on. You need to take an image of a target like at 45 degrees to check whether it is back or f...
Posted by Mannesty on 25/04/2013 - 14:05
disaster
Tried the link for the focus template but can't get it. Anyone else have any links similar. Seems as the even in manual focus I am having problems. The lens I purchased used on eBay too. Damn it!!!!!
Posted by mattox on 25/04/2013 - 19:24
disaster
http://www.dphotojournal.com/focus-test-chart.pdf You could always get the lens serviced.
Posted by dougf8 on 25/04/2013 - 19:58
disaster
Cheers, very interesting thread by the way. I will give this a go. Seems as though the cardboard cutout isn't necessaryhttp://www.dphotojournal.com/focus-test-chart.pdf You could always get the lens serviced.
Posted by mattox on 25/04/2013 - 20:18
Sigma 105mm f2.8 EX DG OS Macro...
...doesn't exist in a Pentax Mount. How infuriating! This lens was recently rated highly by Digital Camera magazine as 'Best for Pentax', so having checked prices I excitedly ordered one from Mathers of Bolton at the weekend. The phone call I received from them on Monday was short, to the point and...
Posted by GMatthews on 18/04/2013 - 14:44
