4 replies to this topic

[SAL]

I'm stuck! I have a Nikon D800 which no longer cooperates with my two Nikkor lens (one is the 70-200mm-1:2.8GII ED, the other Nikkor 50mm, 1:1.4 G).

 

It will work once or twice right after I snap it on, then the viewfinder goes darker and when I press the shutter, nothing. It won't even release.

 

I then put on my Sigma fixed-focus lens, 85mm, 1.4 and it works like a charm.

 

Have you ever seen this? Is this a common glitch with this Nikon body? Both lenses have work brilliantly for years with this body. And suddenly, nothing.

 

I've tried everything, researched everywhere. I even set my camera body back to its factory defaults, to no avail. I tried my two Nikkor lenses on my other camera body, they work well.

 

Thanks so much!

[Jerry_]

This sounds like a communication problem between the body and the lens.

They can be caused by mechanical (f.i. the ring is loose and needs firmly fixing), but are mostly electric ( i.e. the electric contacts on the body or the lens are oxydised or dirty)

First clean the contacts softly, but with a body of the age of a D800 you may need products like the one in the link here : https://www.amazon.c...G/ref=emc_b_5_i

Also, if you do such “cleaning”, process all elements (body and lens(es))

[Merco_61]

The first step would be to check that bayonet and contact blocks are firmly fixed to the body and lenses. The next is DeoxIT Gold, just as Jerry_ said. DeoxIT doesn’t only clean, it stops new oxide forming for a while. 
 

If you need to tighten any screws, remember that they are JIS, not Phillips or Pozidriv. 

[SAL]

This sounds like a communication problem between the body and the lens.

They can be caused by mechanical (f.i. the ring is loose and needs firmly fixing), but are mostly electric ( i.e. the electric contacts on the body or the lens are oxydised or dirty)

First clean the contacts softly, but with a body of the age of a D800 you may need products like the one in the link here : https://www.amazon.c...G/ref=emc_b_5_i

Also, if you do such “cleaning”, process all elements (body and lens(es))

Thanks so much, I will definitely try these suggestions as they make total sense!

The first step would be to check that bayonet and contact blocks are firmly fixed to the body and lenses. The next is DeoxIT Gold, just as Jerry_ said. DeoxIT doesn’t only clean, it stops new oxide forming for a while. 
 

If you need to tighten any screws, remember that they are JIS, not Phillips or Pozidriv. 

Thanks so much and for taking the time!

[g4aaw pete]

The cleaning suggestion is worth a try. My Sigma 12-24mm auto -focus failed and has now been sent to Sigma for repair by the supplier.