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Back button focus using Nikon 70-200mm

JohnJS 16 15
30 Mar 2020 3:43PM
I have a Nikon D810 camera and have set it up for BBF, it works fine when I use the 14-24 lens and the 24-70 lens. But I fitted the 70-200 lens on 2.8 G11ED VR and it does not focus with this lens fitted onto the body.
I would appreciate any help as to why it will not work with this lens fitted.
Thanking You.
John Steadman.
Dave_Canon 16 2.1k United Kingdom
30 Mar 2020 4:54PM
Is it just since you set up BBF; did this lens previously focus OK? There does not seem to be any logical reason why a different lens should matter unless the lens is manual focussing or set to manual.

JohnJS 16 15
30 Mar 2020 5:38PM
Thank you Dave This lens focused OK before I set up BBF it has only happened since I set the camera to BBF.

Dave_Canon 16 2.1k United Kingdom
30 Mar 2020 8:21PM
Probably best to hope for a comment by someone with that particular camera and lens.

LenShepherd 14 4.5k United Kingdom
31 Mar 2020 8:49AM
Have you got the focus selector switch on the lens set to AF-L?

This locks focus when you press and hold the AF-On button, one of the 4 frontal focus buttons on the lens or the shutter button - until you release whichever button you are using to lock focus.
JohnJS 16 15
31 Mar 2020 2:51PM
Thank you both Dave and Len, I have just checked the settings on the lens and the lens was set to manual , I took it of manual mode and it works fine.
Thank you both very much for your help.
John Steadman.

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