Search results for 'back focus' - page 2054
Annoying dots on pictures
I also got dust into the viewfinder the first time I used a Rocket Blower and had to have it professionally cleaned to remove this................................................ Personally I use the white plastic body cap which came with the camera to cover the body whilst putting the first lens ...
Posted by GregNal on 25/08/2011 - 04:24
problem with pentax k r
Check to see if the shutter is set to operate using the 2 sec. timer don't have a Kr but it's usually on one of the function buttons on the back of the camera.
Posted by bforbes on 01/09/2011 - 12:38
Focus Issues with 55-300mm and Circular Polariser
Hi all I'm sure others have experienced the issues I am having at present. I often use polarisers, but have only recently bought a 58mm for my DA L 55-300mm. I have found it useless as the lens focus is so soft with the filter fitted that the pictures are not worth keeping. This worsens the lo...
Posted by davidstorm on 04/09/2011 - 11:29
Focus Issues with 55-300mm and Circular Polariser
Hi David. I have experienced exaxtly the same issue with this lens - and never had this problem on any other. Mine is fine up to around 150mm and then useless beyond. I have tried 3 different CPLs on it with only marginal differences so have given up :|
Posted by fritzthedog on 04/09/2011 - 16:15
Focus Issues with 55-300mm and Circular Polariser
Because it loses two or three stops of light, the maximum aperture of the lens at longer focal lengths no longer enables the use of AF. I'm not sure why you feel the need for a polariser on such a long lens?
Posted by johnriley on 04/09/2011 - 19:30
Focus Issues with 55-300mm and Circular Polariser
Because it loses two or three stops of light, the maximum aperture of the lens at longer focal lengths no longer enables the use of AF. I'm not sure why you feel the need for a polariser on such a long lens? John It's not the autofocus that isn't working. The autofocus still operates fine. ...
Posted by davidstorm on 04/09/2011 - 22:33
Focus Issues with 55-300mm and Circular Polariser
In that case David it looks as though the addition of a polariser has upset the optical configuration. I've never really used polarisers on very long lenses but I seem to recall that they are particularly suceptible to image degradation from filters. Perhaps try another polariser to see if that show...
Posted by johnriley on 04/09/2011 - 22:45
Focus Issues with 55-300mm and Circular Polariser
Thanks John, I've just ordered a Hoya to see if that makes any difference. If it's the same I think I'll give it up as a bad job, as the 55-300mm is very good without any help. Regards David
Posted by davidstorm on 04/09/2011 - 22:57
Focus Issues with 55-300mm and Circular Polariser
Hi David..Interesting subject..I have just recently purchased the same lens (not used too much yet)and i was thinking of getting P/L filter for mine..Already fitted a hood and U/V filter(Kenko)..Is it the Hoya PRO1 P/L filter you have ordrered?..If so i would be interested in the result.. Regards....
Posted by grandadchris6 on 05/09/2011 - 09:51
Focus Issues with 55-300mm and Circular Polariser
Hi David..Interesting subject..I have just recently purchased the same lens (not used too much yet)and i was thinking of getting P/L filter for mine..Already fitted a hood and U/V filter(Kenko)..Is it the Hoya PRO1 P/L filter you have ordrered?..If so i would be interested in the result.. Regards....
Posted by Northgrain on 05/09/2011 - 18:46
Focus Issues with 55-300mm and Circular Polariser
Hi to Chris & Tim - of course I would be very happy to let you know how the Hoya goes on. I've done a bit of research since posting the thread and it seems that problems with Circular Polarisers and long zooms are not uncommon. I also tried the filter on my son's Sigma 70-300mm DG APO and suffered...
Posted by davidstorm on 05/09/2011 - 22:26
Focus Issues with 55-300mm and Circular Polariser
I am happy to report that the Hoya Circular Polariser works perfectly with the DA L 55-300mm, without any focus issues. I'm not sure why this circular polariser works whilst some others don't, but it does. The Hoya is not the 'pro' version, it is just a standard one but the quality appears to be...
Posted by davidstorm on 07/09/2011 - 20:24
Posted by grandadchris6 on 07/09/2011 - 22:59
Focus Issues with 55-300mm and Circular Polariser
Hi, I have just got the same problem with my L 55-300mm. I have purchased 55-300mm lens together with my camera and basic 18-55mm lens. It was working fine with UV filter before. However after my last visit in London I have found that my lens is not focusing as sharp as it was before with or with...
Posted by Lankaster on 24/09/2011 - 21:51
Focus Issues with 55-300mm and Circular Polariser
Have you tried it in manual mode? If it does not focus well in manual then it seems likely that the lens is defective. If it is still under warranty you should be able to have it repaired free of charge via your retailer. If it is out of warranty there are a number of repairers e.g. Asahi Photo L...
Posted by helios on 27/09/2011 - 14:07
Focus Issues with 55-300mm and Circular Polariser
Just to clarify, I don't have any problems with my DA L 55-300mm lens. It only has issues when used with a circular polarising filter, not on its own or with a UV filter. It sounds as though your lens has developed a fault and you should get it checked under warranty if you can. As far as lens re...
Posted by davidstorm on 27/09/2011 - 21:56
Focus Issues with 55-300mm and Circular Polariser
Hi all I'm sure others have experienced the issues I am having at present. I often use polarisers, but have only recently bought a 58mm for my DA L 55-300mm. I have found it useless as the lens focus is so soft with the filter fitted that the pictures are not worth keeping. This worsens the lo...
Posted by bychan on 28/09/2011 - 01:01
Focus Issues with 55-300mm and Circular Polariser
Bit of a digression, I know, but following this thread did make me think. I have an old Hanimex 500mm mirror lens (original T-mount in Pentax-K) that has never seemed to be quite sharp. It came with a Hoya 72mm 1B filter, which has never been removed. This thread does suggest that I should try th...
Posted by DoctorJeff on 28/09/2011 - 10:34
Focus Issues with 55-300mm and Circular Polariser
The 82mm diam. filter on the Tamron 500mm was part of the design and actually improved it's sharpness :wink: http://forum.fourthirdsphoto.com/showthread.php?t=18954 It's just a myth that filters reduce sharpness. Some filters actually improve it particularly at the edge of the frame :shock:
Posted by Algernon on 28/09/2011 - 11:30
Focus Issues with 55-300mm and Circular Polariser
The 82mm diam. filter on the Tamron 500mm was part of the design and actually improved it's sharpness :wink: Mebbe so, but I don't have a Tamron. And, some mirror lenses (including at least one Tamron, I think) had a rear filter system that was part of the optical design, and had to be used. It...
Posted by DoctorJeff on 28/09/2011 - 11:46
