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jeffslife
Joined: 17 Apr 2010
Posts: 4190
Location: ohio usa
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| Posted: Sun Oct 10, 2010 4:46 pm Post subject: adjusting center focus |
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me again, another dumb question.
When I adjust the center focus and then tighten the knob(per the manaul)
I cannot turn the lens to adjust the corner focus unless I loosen the center
focus knob again and then they both move. What am I doing wrong?
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Sun Oct 10, 2010 10:09 pm Post subject: |
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even my cat is laughing.
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winduptoy
Joined: 25 Nov 2006
Posts: 187
Location: Lunenburg, Nova Scotia
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| Posted: Sun Oct 10, 2010 10:15 pm Post subject: |
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Lenses might be a little stiff, especially if they haven't been used in a while. If the lens barrels are dirty, remove the lenses(don't forget to remove the ground wire) and clean the dust and stuff off with 1) vacuum cleaner 2) damp clean cloth 3) clean cloth or good paper towel moistened with isopropyl. This is not for the lens elements, just the barrels. Now loosen the edge focus nut and twist the front of the barrel back and forth to see if you can increase the range of movemnt while keeping the center focus adj. nut tight. Reinstall lens when you are satisfied with the improvement and reconnect ground wire. (PJ will not work with grounds diconnected.
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jeffslife
Joined: 17 Apr 2010
Posts: 4190
Location: ohio usa
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| Posted: Sun Oct 10, 2010 10:25 pm Post subject: |
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Thanks for the info, I cleaned the lenses but not the barrels. The pj is very clean I didnt know this was a problem.
I never had an issue with it on my old zenith.
THANK YOU FOR YOUR HELP>
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MrBlonde83
Joined: 16 Mar 2009
Posts: 132
Location: Lansford, PA
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| Posted: Wed Dec 01, 2010 8:05 pm Post subject: |
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yeah mine does that too! so that's what you have to do? its dirty where the outer lens moves with the inner part? i never knew there was a ground wire inside. i didn't think there was anything electric with these lenses.
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AFryia
Joined: 09 Mar 2006
Posts: 965
Location: S.E. Michigan VPH-G70Q
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| Posted: Fri Dec 03, 2010 9:52 pm Post subject: Re: adjusting center focus |
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| jeffslife wrote: |
When I adjust the center focus and then tighten the knob(per the manaul)
I cannot turn the lens to adjust the corner focus unless I loosen the center
focus knob again and then they both move. |
That's not normal MO.
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