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Zimsmith

Zimsmith

Member Since 31 Jul 2022
Offline Last Active Aug 07 2022 07:38 AM
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#79838 Nikon 600mm f4 prime stops autofocusing intermittently

Posted by Merco_61 on 02 August 2022 - 12:27 AM

It might be worth cleaning all contacts with DeoxIt Gold if the contact resistance has detoriated with age. Standard electronics cleaners or alcohol don’t have the same cleaning performance and long-term protection on gold-plated contacts.




#79818 Nikon 600mm f4 prime stops autofocusing intermittently

Posted by Merco_61 on 01 August 2022 - 03:19 AM

Do you use the grip and large battery? I have found that the higher voltage solved the same intermittent DC/DC fault with TC on my AF-S 80-200 on both D700 and D800E. It might be that an undervoltage caused by the extra resistance in the TC triggers some fault in the DC/DC circuitry.