How Strong is a Sony Lens Mount

[quod]

What I care about is that my lens not disconnect from my camera body at the wrong time. This happened to me with my 5D3 and 500mm f/4 with 1.4x III extender. I connected the lens to my Black Rapid with my hand wrapped around the foot of the lens in order to stabilize it while walking. Nevertheless, my 5D3 disconnected with the lens and fell on the concrete (my RRS L-bracket took the hit). Somehow my 5D3 loosened and rotated off the lens while I was walking along. I have no clue how it happened. Anyone who thinks Canon is not prone to mount-related issues is mistaken.

Your hand or some part of your clothing or the strap depressed the lens release button. That's a 'mount-related issue' only in the wetware sense (i.e. you).

It might have have been me, but I don't know this and neither do you. I was there and you were not. Nothing obvious (i.e. my hand or belt loop) was anywhere near the lens release button or pulling on the camera when it fell down.

Thanks for the heads-up on the AFMA issue. I haven't noticed any issues, but it is worth reviewing.

 

[Mt Spokane Photography]

Substitute Sony with Canon in that search

Also some rotational play is completely normal, happens with all my Canon lenses on my Canon bodies.

Actually, I did that. There are questions about rotational play which have nothing to do with strength of a lens mount. Its a tolerance build up on the lens side of the mount, and has nothing to do with the mount on the camera body.

Rotational play is not the same issue as a plastic lens mount that is deflecting. There are no companies that produce replacement mounts for the 100 million or so Canon lenses out there, because they don't need them. Sure, the mounts do get replaced, but its very infrequent.

Yeah well this is the internet, full of problems blown completely out of proportion and in this case there is a company making money by blowing it out of proportion.

Roger Cicala from lensrentals participate on this thread about this on DPR forums if you are interested in some sensible information about it:
http://www.dpreview.com/forums/post/54615245

The company selling replacements and making money did not blow it out of proportion, they responded to user demand. If users do not have a problem, they won't buy one, so they are taking a risk. The problem came first, then the third party fix. Sony is well known for their refusal to respond to buyer issues. That is something they need to respond to before most Professional Photographers will take them seriously.

...

How do you know? Did you read Roger's posts, specifically what he had to say about Photodiox's video? No offence, but I think I'll trust Lensrentals experiences with renting out "dozens and dozens" of A7 cameras over what I read from that company.

Roger was responding to the posts about loosening the mount screws to simulate the issue. He said that loosening the screws will always cause it to happen and I agree.

I believe that my assessment which says that users who do not have a problem will not buy one is correct, Roger said nothing about that.

I also believe the many posts from owners who saw the issue long before Fotodiox announced their product 5 days ago. Its pretty difficult to announce a product on October 18, and cause camera owners to complain last March. Some sort of really neat time machine would be needed.

 

[msm]

Roger was responding to the posts about loosening the mount screws to simulate the issue. He said that loosening the screws will always cause it to happen and I agree.

Nah he replied to no such thing, it was Roger who brought up loosening the mount screws in the first place, implying Photodiox did that to make this problem happen in their commercial video.

I believe that my assessment which says that users who do not have a problem will not buy one is correct, Roger said nothing about that.

I disagree, all users who are afraid their mount might break and their expensive lens may fall off and be destroyed may want to buy this. What Photodiox does is a classic example of FUD, create a market for their own product by creating fear and uncertainty about other products. Looking at the other thread here, it seems you are intent of helping them.

I also believe the many posts from owners who saw the issue long before Fotodiox announced their product 5 days ago. Its pretty difficult to announce a product on October 18, and cause camera owners to complain last March. Some sort of really neat time machine would be needed.

The many posts? I checked your search and from many of them it was not clear what sort of "wiggling" they experience. And many of the remaining posts were clearly about rotational play, which by my knowledge are completely normal and also happens with *all* Canon cameras I have used. But yeah anything can happen especially when you try to lift that sony a7+ Metabones adapter + Sigma 200-500 f2.8 combination by the camera grip so better get that tough e-mount to be safe.

 

[sagittariansrock]

But yeah anything can happen especially when you try to lift that sony a7+ Metabones adapter + Sigma 200-500 f2.8 combination by the camera grip so better get that tough e-mount to be safe.

Except, I'd prefer a broken mount than the front of my camera being wrenched out if I were to do something as silly as that.

 

[tcmatthews]

There is also a bit of the pot calling the kettle black. I have several adapters to adapt lens to my NEX. I was driving in a John Deere Gator taking pictures with my Nex 6 and a old 24mm FD lens when I noticed something wrong. I could not get things to focus correctly. It was at that time I noted the lens was flopping around.

It turns out that the adapters screws had come loose and there is a bit of a spring pushing the lens out. If I had not stopped to take a picture of a cactus it is very likely that the lens would have flown of the camera and landed it the dirt. I drive fast and it is an open cab.

I just checked that lens adapter is made by Fotodiox. It also appears to not be a bit two long and I cannot quite achieve infinity focus on any of my FD lens. I still use it because it is better than my other Fotasy FD adapter.

Not to mention my first cheep all manual EF to NEX adapter was also a Fotodiox. The first lens I put on there was so tight that when I tried to release it the nob broke off. I had to Carve out a hole by hand with a drill bit to release the lens. Good thing the body is cheep aluminum.

If anyone wants to try it go ahead. But I would not touch the thing chances are it is not even close to keeping in specs.

 

[weixing]

Hi,
Looking at the video, the mount screws are not screwed on the plastic part, so the plastic part is just sandwich between the E-mount and the mounting point. IMHO, if your lens wiggle, it should had nothing to do with the plastic part... may be the mounting screws are just loosen.

Have a nice day.

 

[sdsr]

Roger was responding to the posts about loosening the mount screws to simulate the issue. He said that loosening the screws will always cause it to happen and I agree.

Umm - What Cicala wrote, titling his response "Shame on you Fotodiox" was this:

"For loosening the screws in their demo camera before making that video. We've got dozens and dozens of A7s and I'd never seen flex like that. But if I loosened each mounting screw 1/2 turn, I got flex exactly like that."

(Lots of other sensible-looking posts in that thread too.) I think msm's perspective is quite plausible. There may be some problematic bodies (I have no idea, but Cicala has seen more than probably anyone else), but it's not at all clear what "the issue" was that people were complaining about - slight rotational play, clueless mishandling or something else, let alone whether any mere "wriggling" had any effect whatever on the images produced. The idea that Fotodiox is responding to demand rather than trying to create it by exploiting internet chitchat is a tad naive (even if they were it's not clear exactly what the demand is or whether this will satisfy it). And based on my experience with their lens adapters - usually perfectly fine except sometimes with inaccurate infinity stops - I doubt Fotodiox are the last word in mechanical finesse and I certainly won't be buying one of these things for my A7r or A6000 (nor, when I attach my 70-300L to either one, would it occur to me to pick the combination up by the body...).