Comments on: My Lens Focus Issues Are Fixed, or “I Told You So” http://regex.info/blog/2007-01-19/363 Not a photo blog. A personal blog with photos. Mon, 21 May 2012 08:38:42 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Adrian http://regex.info/blog/2007-01-19/363#comment-45292 Adrian Sat, 11 Feb 2012 18:42:52 +0000 http://regex.info/blog/2007-01-19/363#comment-45292 Hello, Thanks for you tutorial. You test chart was very helpful. I was very easy for me to confirm that I have a front focus. The issue is that it's a lens front focus, not a body front focus. Tested the lens on another body to double check this. Now I just have to find a service that do lens calibration. My camera body, a D80, doesn't have focus correction. Hello,

Thanks for you tutorial. You test chart was very helpful. I was very easy for me to confirm that I have a front focus. The issue is that it’s a lens front focus, not a body front focus. Tested the lens on another body to double check this. Now I just have to find a service that do lens calibration. My camera body, a D80, doesn’t have focus correction.

]]> By: William Halvorsen http://regex.info/blog/2007-01-19/363#comment-33111 William Halvorsen Wed, 31 Dec 2008 15:06:21 +0000 http://regex.info/blog/2007-01-19/363#comment-33111 Hi Jeffrey, Thank you very much for taking the trouble to pursue this issue to a successful conclusion and particularly for informing others about your experience. Your postings and the responses they have elicited have been both useful and entertaining. I hope others will now be encouraged to perform such testing on their equipment. By the way, have you ever received an apology--or, at least, an acknowledgement--from the "loudmouth" Len Shepherd? I notice his obnoxious broken record continues to play on the forums. <span class='jfriedl'>No, I haven't, and I wouldn't expect one, because people who are always right about everything never have a need to apologize, only endure the ignorance and stupidity of others. —Jeffrey</span> Best regards, Bill Hi Jeffrey,

Thank you very much for taking the trouble to pursue this issue to a successful conclusion and particularly for informing others about your experience. Your postings and the responses they have elicited have been both useful and entertaining. I hope others will now be encouraged to perform such testing on their equipment.

By the way, have you ever received an apology–or, at least, an acknowledgement–from the “loudmouth” Len Shepherd? I notice his obnoxious broken record continues to play on the forums.

No, I haven’t, and I wouldn’t expect one, because people who are always right about everything never have a need to apologize, only endure the ignorance and stupidity of others. —Jeffrey

Best regards, Bill

]]> By: Brett http://regex.info/blog/2007-01-19/363#comment-32117 Brett Tue, 23 Dec 2008 02:38:59 +0000 http://regex.info/blog/2007-01-19/363#comment-32117 Boy, this Len Shepherd guy gets around. I just read this update to your lens focus saga, and I thought his name sounded familiar. Last spring I posted on Nikonians.org about some apparent focus inaccuracy with my 200-400 f/4 lens on my D200, and one poster kept responding with what I felt were unreasonably critical comments. I just checked and sure enough, it was our friend Len. Anyway, thanks a LOT for your contributions to focus calibration. I'm hoping a future Nikon DSLR will support auto-calibration, where you just point the camera at a test target and it figures out the appropriate AF fine tuning value for you. There's no reason for this to be a manual process. Boy, this Len Shepherd guy gets around. I just read this update to your lens focus saga, and I thought his name sounded familiar. Last spring I posted on Nikonians.org about some apparent focus inaccuracy with my 200-400 f/4 lens on my D200, and one poster kept responding with what I felt were unreasonably critical comments. I just checked and sure enough, it was our friend Len.

Anyway, thanks a LOT for your contributions to focus calibration. I’m hoping a future Nikon DSLR will support auto-calibration, where you just point the camera at a test target and it figures out the appropriate AF fine tuning value for you. There’s no reason for this to be a manual process.

]]> By: James Gilbert http://regex.info/blog/2007-01-19/363#comment-19854 James Gilbert Mon, 01 Sep 2008 16:20:23 +0000 http://regex.info/blog/2007-01-19/363#comment-19854 Thanks for this page. I have a bad front-focus problem on my 17-55 f2.8 DX lens at the 17 mm end. I posted a question on the Nikonians lens forum, and the only reply so far is from a certain "Len Shepherd" who was explaining that I don't understand how to use AF on my D200 correctly! I've lodged the problem with the Nikon UK website. Hopefully I can get the lens calibrated. I will plan to send them the lens only, since the D200 focuses every other lens I own perfectly. <span class='jfriedl'>Don't worry about the "Len Shepherd" notes. He's either a robot who blindly responds with "you are stupid! You know nothing!" notes to every post, or a fairly pathetic human who does the same. —Jeffrey</span> Thanks for this page. I have a bad front-focus problem on my 17-55 f2.8 DX lens at the 17 mm end. I posted a question on the Nikonians lens forum, and the only reply so far is from a certain “Len Shepherd” who was explaining that I don’t understand how to use AF on my D200 correctly!

I’ve lodged the problem with the Nikon UK website. Hopefully I can get the lens calibrated. I will plan to send them the lens only, since the D200 focuses every other lens I own perfectly.

Don’t worry about the “Len Shepherd” notes. He’s either a robot who blindly responds with “you are stupid! You know nothing!” notes to every post, or a fairly pathetic human who does the same. —Jeffrey

]]> By: Brian C http://regex.info/blog/2007-01-19/363#comment-17586 Brian C Sat, 17 May 2008 20:44:12 +0000 http://regex.info/blog/2007-01-19/363#comment-17586 Hi Jeffrey, thank you for the excellent article and test chart. I have the D300 and 18-200 VR lens and have always been a bit disappointed with the crispness of the focus -(i.e. it wasn't!). This was especially annoying as the 18-200 lens performed really well on my previous D70s. So, having used the chart and your instructions I have found that the sharpness in the lens achieves acceptable quality using the AF Fine Tune - using a setting of -16! I am not sure whether that means I should get the camera / lens recalibrated by Nikon? Any thoughts. I do not have any other lenses at the moment. Are there any downsides to just running as it is? Many thanks again. Brian <span class='jfriedl'>I don't have a D300, but I think the whole point of the AF fine Tune feature is to use it exactly as you've done. If it now focuses well, count your blessings and go take some pictures :-) —Jeffrey</span> Hi Jeffrey, thank you for the excellent article and test chart.
I have the D300 and 18-200 VR lens and have always been a bit disappointed with the crispness of the focus -(i.e. it wasn’t!). This was especially annoying as the 18-200 lens performed really well on my previous D70s.
So, having used the chart and your instructions I have found that the sharpness in the lens achieves acceptable quality using the AF Fine Tune – using a setting of -16!
I am not sure whether that means I should get the camera / lens recalibrated by Nikon? Any thoughts. I do not have any other lenses at the moment. Are there any downsides to just running as it is?
Many thanks again.
Brian

I don’t have a D300, but I think the whole point of the AF fine Tune feature is to use it exactly as you’ve done. If it now focuses well, count your blessings and go take some pictures :-) —Jeffrey

]]> By: Michael Oard http://regex.info/blog/2007-01-19/363#comment-7181 Michael Oard Sun, 15 Jul 2007 19:20:33 +0000 http://regex.info/blog/2007-01-19/363#comment-7181 Jeffrey, thanks for your persistence and method in dealing with your camera/lens issues. I have a d80, a 50 1.8, 18-200 vr and a new 70-200 2.8. I have found that the 70-200 is not as sharp as it should be. I have taken test shots with your chart and the 50mm and the 70-200. Both appearr to show backfocus. I would appreciate if you would look at the shots. Best Regards, Michael Oard Jeffrey,
thanks for your persistence and method in dealing with your camera/lens issues.
I have a d80, a 50 1.8, 18-200 vr and a new 70-200 2.8.
I have found that the 70-200 is not as sharp as it should be.
I have taken test shots with your chart and the 50mm and the 70-200. Both appearr to show backfocus. I would appreciate if you would look at the shots.
Best Regards,
Michael Oard

]]> By: nils http://regex.info/blog/2007-01-19/363#comment-3115 nils Sat, 20 Jan 2007 13:44:30 +0000 http://regex.info/blog/2007-01-19/363#comment-3115 Congratulations, you must be very relieved. Congratulations, you must be very relieved.

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