500mm fixed lens wont work with my adapter?

[Josh66]

You know - other than a brief stint with Minolta film gear, all I've ever used was Canon, EOS mount.

I have never had a single error - not ONE. Grated, I've only been doing this for about 10 years, but still - 10 years, no errors.

Not even anything that would resemble any sort of malfunction...

And I have never cleaned the lens contacts a single time.


I don't know ... maybe I'm just lucky. They said that when I had an AR-10 that actually worked (Armalite). It's been nothing but the best for me - and I have abused the **** out of it - believe me...lol. Same with all my Canon gear. It's seen a lot of abuse, but it all still works, and I've never had a single error. Like I said, maybe I'm just lucky.

From where I stand though, it just looks like it's good stuff...


In this specific case though - since there are no contacts to speak of... As long as the mount is the proper dimensions, I don't see why it wouldn't work. I know for a fact that it would work on any of my cameras, I can't figure out why it would be different on another camera with the same mount...

 

[Derrel]

I think there ARE contacts involved...on the teleconverter...

You're lucky...a Google search on Canon +Error99 brings up 1.4 million hits...

Sigma lenses on Canon have locked me up multiple times...

 

[Josh66]

I think there ARE contacts involved...on the teleconverter...

Yes, but assuming that there are no contacts on the lens - there is no circuit.

If there are no contacts on the lens, whatever contacts may or may not be on the teleconverter shouldn't matter.

It wouldn't be any different than putting the body cap on...

 

[j-dogg]

I have a Digital Rebel XTi and a Fotodiox Nikon/EOS adapter, I have mounted and shot all of my Nikkor film lenses some 40+ years old with no issues, and it works in some of the auto modes, even full auto.

I get no autofocus and have to manually set my f-stop, and somehow the camera knows this and will not let me adjust the f-stop on the body which reads F00. But it meters and know what shutter speeds it needs, and most of the time it's pretty accurate and gives good exposure, but I use it in full manual mode anyways.

EXACTLY, j-dogg...I use Nikon-mount lenses on my Canon's quite often..and since the adapters have no contacts whatsoever, there is no activation of the electronic interface in the Canon body,and the cameras shoot just fine. I suspect there's a contact problem somewhere in the OP's setup,and the camera is telling him via a warning message that there is a contact issue...

Can't believe I didn't think of this sooner, but find someone or a camera shop with the same camera and try it on theirs. I helped a lady solve an issue she had with a 75-300 USM III lens on her Rebel, she would get the same message with the lens fully extended in full auto mode. I have the exact same camera and her lens would do it on mine too, and we put on a 400mm f2.8 L on both of them and it was fine.

 

[Derrel]

I think there ARE contacts involved...on the teleconverter...

Yes, but assuming that there are no contacts on the lens - there is no circuit.

If there are no contacts on the lens, whatever contacts may or may not be on the teleconverter shouldn't matter.

It wouldn't be any different than putting the body cap on...

1- The converter HAS contacts--on the front and the rear.

2- A body cap has NO contacts.

Ergo, it is quite different from putting on a body cap. Regardless, using a 2x teleconverter on a 500mm f/8 mirror lens does not make much sense. Just crop at the PC--it will yield a better result.

 

[leejt1986]

Hmm...I'm still not clear on if it'll work even if i clean the censors