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View Poll Results: Have you experienced FF/BF problems with your lenses?
No 1727.87%
Yes, but only in-body adjustments were necessary 3455.74%
Yes, one or more lenses had to be sent in 1016.39%
Voters: 61. You may not vote on this poll

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11-21-2011, 06:54 PM   #1
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Front/Back Focus an Issue?

Here's a simple poll to see how Pentax lenses are doing- have you experienced FF or BF issues with your FA/DA series lenses?


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11-21-2011, 07:01 PM   #2
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i've a FA43 pretty bad back focus, but unfortunately in my country there is no way of sending the lens to Pentax for adjustment so i can only do in body adjustment.
11-21-2011, 07:33 PM   #3
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No pentax lens of mine need any FF/BF issues.
Sigma/Tamron, however, they all require minor adjustments (+/-3).
11-21-2011, 07:33 PM   #4
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I have no problems whatsoever with Front or Back Focus with any of my lenses when on my good ole Dist*, however, on my K-7 I have a combo of FF and BF amongst my all my lenses.. Don't really make sense.

11-21-2011, 08:06 PM   #5
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My 40mm limited started BFing on my K-x after about 6 months. I guess I'm too lazy to send it in.
11-21-2011, 08:43 PM   #6
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I had a DA 35mm f/2.4 backfocus out of the box when I only had my K-x. Sent it in and it works perfectly now on both cameras.
11-21-2011, 08:50 PM   #7
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FA 31 Limited with slight back focus on K7. Had Katzeye install and calibrate one of the focus screens and have no obvious problem at this point but I haven't checked all my lenses.
11-21-2011, 09:58 PM   #8
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FA31Ltd needed minor in-camera adjustment of +3 on a K5; it also needed adjustment on K10D
DFA100WR does not need anything on K5; not tested on K10D

11-21-2011, 11:09 PM   #9
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I voted no. I haven't really tested any of my lenses with charts or anything like that because my everyday results have given me no reason to. I have had some occasions where my DA 40 appeared to be a little off but all the shots where this has shown up were crowded scenes where the camera likely focused on something in the background. These have been rare events, not something regular so it's likely my error.
11-22-2011, 12:28 AM   #10
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My 16-45 has a back focus at 16, but as I correct that, it goes into front focus at 45...
It's not a big deal but I'm not paying for the adjustment. I'm planning on buying the Tamron 17-50 anyway soon and I'll sell this as it is.

The last 16-45 I had on my K10 also back focused (a lot!), but it was spot on a K-x... It's just my luck...
11-22-2011, 12:40 AM   #11
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I have several bodies. One of the lens need to adjust to the extreme on one body.
11-22-2011, 01:00 AM   #12
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My K10d has a tendency to back focus all lenses at mid distances (at close distance it's much better). It seems to have acquired this bad habit over time, it used to be better.
11-22-2011, 01:32 AM   #13
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No issues for me with the DA* 300/4 on both K5 and K10D...
11-22-2011, 02:44 AM   #14
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what does it mean back focus issue? like when you point to focus something and it seems to be on focus but in fact the real fine focus is some millimeters ahead?
11-22-2011, 03:09 AM   #15
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I think that the people who say NO don't know how to messure. It is a relatively new thing for our camera's to adjust and I think that in a few years time non of us will find it strange to messure our lenses to adjust them to get critical sharpness.
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