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Archive 2016 · 200mm micro delamination

  
 
LeifG
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p.1 #1 · p.1 #1 · 200mm micro delamination


I'm curious how often people see delamination of lens groups.

I sent a 200mm F4 AFD micro lens for cleaning as it had early stage fungus. They reported that it had a delaminated element. Unfortunately I only examined the exterior prior to sending it, the last inspection of the insides being many months earlier, so the delamination must have occurred then. I ruled out the courier and servicing companies doing it because a) I did not examine the optics prior to sending so I have no proof, b) the repairer is a very reputable company I've used before c) there was no sign of impact damage and d) the lens was cushioned in loads of protective stuff on the out and in journeys. And I am not convinced that impact damage would cause such a fault, so perhaps moisture ingress caused the cement to fail. Sadly Nikon no longer sell replacement lens groups and Nikon Rumors reported the lens being discontinued.

I also have an old 60mm AFD F2.8 micro lens which has delamination of the rear lens group. It is usable when stopped down.



Jul 14, 2016 at 07:20 AM
gfinlayson
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p.1 #2 · p.1 #2 · 200mm micro delamination


I had a delaminated group on an AF 35-70 f/2.8 a few years back. Nikon UK replaced the group, but it was an expensive repair.


Jul 15, 2016 at 06:06 PM
rw11
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p.1 #3 · p.1 #3 · 200mm micro delamination


fungus can cause that, AFAIK

rumor is that Nikon will bring out a new lens soon, so...



Jul 15, 2016 at 06:10 PM
morrismike
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p.1 #4 · p.1 #4 · 200mm micro delamination


Being left in a car during the summer or even an attic can cause it too.


Jul 15, 2016 at 07:08 PM
euua
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p.1 #5 · p.1 #5 · 200mm micro delamination


rw11 wrote:
fungus can cause that, AFAIK

rumor is that Nikon will bring out a new lens soon, so...



indeed ... but i bet price tag will be upped 3K or so.....



Jul 15, 2016 at 08:27 PM





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