How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Russell A. Your Own Question

Russell A.
Russell A., Camera and Video Technician
Category: Camera and Video
Satisfied Customers: 5011
Experience:  30 years of experience as a TV station technician gives me a unique understanding of technical equipment issues.
24675295
Type Your Camera and Video Question Here...
Russell A. is online now
A new question is answered every 9 seconds

I have a Nikon D4 and just purchased a Nikon AF-S Nikkor

Customer Question

Hi I have a Nikon D4 and just purchased a Nikon AF-S Nikkor 600mm 1:4 D
Nikon ED. And it will not focus all the way and take picture. The af motor moves and gets close. If you use M/A and turn focus ring that little bit more and it's focused and takes picture. Any ideas to make this work I thought maybe the camera and lens were incompatible but from what I read they seems ok together. Any help would be appreciated.
Submitted: 2 months ago.
Category: Camera and Video
Expert:  Rick replied 2 months ago.

Hi. My name is*****'m a camera repair technician with almost 30 years in the business and I'll be glad to help you with your question today.

This may be cured using the backfocus adjustment built into the camera. It's labelled AF Fine Tuning. There is a procedure to set this for every lens. Be sure you set this feature "ON" and leave it on, it's a great option for many back or forward focusing issues. Some camera shops will even offer this service for you. Also, make sure you are using a single point focus. If the problem turns out to be an issue with the lens itself, it's going to need to be calibrated by a qualified technician. You may want to check locally for a camera repair shop in your area, or, if you need assistance finding a shop, please let me know and I'll locate one for you.

Please provide a positive Rating so that I may be credited for my efforts.
If I can be of further assistance, please ask rather than leave a negative response.

Thank You

Rick

Related Camera and Video Questions