Yikes, something fell out of my 5D2...!

S

sleepo

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Steve
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Hi all,

I went to put my 100mm macro on my 5D2, so took off the current lens (a Pentax 50mm with an M42 adapter). The 100mm lens wouldn't go on, so I looked inside the mount and found a loose bit of metal, which fell out when I inverted the camera. It looks like this:

bitofmetal.jpg


for scale:

bitofmetalwithpenny.jpg


Does anybody know what this is? I'm hoping it's part of the M42 adapter rather than part of my 5D2 or lenses! The camera seems to work still (it took those shots) and there doesn't seem to be anything missing from the M42 adapter.

Any advice welcome, thanks!
 
That looks like a small screw thread in part of the metal. So it could be a portion of the M42 lens, the remainder may have stayed inside the Pentax lens.
Are you sure the mirror etc cleared the back of the screw adapter, might be worth lifting the mirror and having a good look round.
 
MatBin said:
That looks like a small screw thread in part of the metal. So it could be a portion of the M42 lens, the remainder may have stayed inside the Pentax lens.
Are you sure the mirror etc cleared the back of the screw adapter, might be worth lifting the mirror and having a good look round.
Click to expand...

I'm hoping it's from a lens and not the body! But that said I've checked all my M42 lenses and none of them seem to have bits that could have caused it, or holes where there used to be bits. I've flipped the mirror on the camera and had a good look but everything looks OK and the mirror is intact.

As for the coin - it's a 1p. The piece of metal is really small.
 
That looks quite a weathered piece of metal to have come out of a new(ish?) mark II. An old lens seems a more likely candidate.

Just thought - is the small piece magnetic at all? If so, it might have been stuck on the lens rather than being from it. Check other things near where the lens was stored.
 
Looks like cast brass which would imply it is fairly old rather than modern so my guess would link it an old manual lens rather than a new camera. Fingers crossed :)
 
I agree it looks weathered but thought that might just be because I shot it with a macro lens :) I hope it's indicative of its age though... I did test to see if it is magnetic - it doesn't stick to various pipes or my radiator!
 
That piece is cast and not very good quality, if it came from the 5D I would worry about Canon's build quality a lot.

Looking at it, it looks like a course imperial machine screw thread, I would imagine anything in the 5D would be a metric thread. So, I wouldn't panic, I would think that it came from the lens most likely.
 
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