NJphotodoc Loc: Now in the First State

So Tamron replaced the defective 18-270 lens that Cameta was able to get off my D7000. They then mounted the new lens on my camera and was able to remove it so they put it back on the body and sent it to me. I received it, went to remove the lens and (wait for it......) it wouldn't come off.

Spoke with Chris at Cameta and he said to send it all back which I did. He was able to get it off, but required that he press the lens tightly against the camera in order to release it. No problem with Nikon lens, but he said there are 2 pins on the Nikon that lock the lens to the camera. When you push on the release button, they descend into the mount and allow the lens to turn and be removed. If the lens is not fully aligned and tight to the mounting plate, then it may be the cause for the problem since the camera may not "know" there is a lens when you turn to lock into place.

He suggested a thorough cleaning (done) would help and he also sent the replacement lens back to Tamron as he noted some focusing issues with it. Luckily I have a bunch of Nikon prime lens (35, 50 mm) so not totally without the use of the D7000 until I get the lens back.

So the final thoughts are:
1) did the original Tamron lens somehow damage the Nikon mount?
2) Did the Nikon mount somehow damage the Tamron?
3) or was it just a little bit Nikon, a little bit Tamron, and a little bit of bad luck all around and I got caught in the middle?

In any case, I'm thinking of getting a D7200 body and using the D7000 as backup and use it mostly for astrophotography and with my 500mm, both of which use T-mounts. And yes, I will get it from Cameta if only because they back up their sales and have excellent customer support.

rmalarz Loc: Tempe, Arizona

And once again, the reason I stay with OEM equipment.
--Bob

foathog Loc: Greensboro, NC

I couldn't agree more.

brucewells Loc: Central Kentucky

Leitz Loc: Solms

Every Nikon body flange I've ever seen has but one locking pin. Unless that has changed, I'd be leery of Cameta for whatever they're trying to tell you.

NJphotodoc Loc: Now in the First State

7000 has 2 pins, both controlled by the release button. both have to descend into the ring to release the lens.

Leitz Loc: Solms

I wasn't aware of that change. So when you mount a lens with one locking hole, the other pin remains retracted?

NJphotodoc Loc: Now in the First State

I would assume so. Not sure if there is some kind of interlock on the pins. In any case I tried it with my Nikon lenses and also I have a Rokinon 80mm and they all work fine. I also think that the cleaning may have addressed some of the problems as well.
Tamron is looking at the lens since Cameta did ID some focusing issues when they tried both on my D7000 and another body. No specifics as I only spoke to the CS rep who read me the file notes and not Chris.
I have to say that for an out-of warranty body (lens is still within the warranty period however), Cameta really worked to solve this problem. All that I've had to pay is for shipping to them and nothing more. When I see some of the horror stories others have had, I feel sorry for them but VERY glad for me

Leitz Loc: Solms

You should be able to tell by looking at it. At any rate, good to hear you're getting satisfaction!

robertjerl Loc: Corona, California

Murphy rules!

mas24 Loc: Southern CA

I am now beginning to think the problem was you, not the camera nor the lens. You most likely mounted that lens several times with too much excessive force, causing damage to the lens and camera. Tamron lenses are good lenses. Perhaps not as sturdy in build as the Nikon or Canon. All brands of lenses mount and dismount. Cheap or expensive. I've never had a stuck lens. I hope you don't experience this again. Good luck.

Howard5252 Loc: New York / Florida (now)

the D7000 has one locking pin. True, there are two "things" that protrude up out of the mount and both will retract when Lens Release button is pushed but only one is a locking mechanism, it looks like a small rod protruding from the mount. The other can easily be pushed down with a finger and has a dome-like top, clearly made so as to be easily pushed down and slid over and serves another purpose. The Locking pin is pushed down by the lens when properly placed onto the body before rotating it into its locked position. The click you here when the lens is properly mounted is the locking pin popping back up (into the lens). I could find no mention of either in the manual. I did find an answer to something I was always wondering about. Should the Lens Release button be pushed when mounting a lens? Answer: no.

jerryc41 Loc: Catskill Mts of NY

It's good you have Cameta to work with you, but I'd think twice about buying a Tamron.

lone ranger Loc: Port Saint Lucie, Florida

A excellent reason to stay with OEM Nikon, and stay away from these 3rd party bargains...

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

It is not, as you say, just a little bit Nikon, a little bit Tamron,and a little bit bad luck. It is ALL TAMRON, they call it THIRD PARTY GLASS for a reason. Learn and go forward my friend and walk in the light of Nikon and you will be blessed with no more little bits.