HIya
Thankyou for accepting me on the site.
I was tightening the bracket screw on a 75-300 which is now done and its nice and secure.
Sadly i cant put it back together as a part came out and no one can identify it?
Maybe some one here can help.
Its the brass horse shoe looking piece in the photo.
Thank you for looking.
need to identify a Part from a Sigma 75-300
need to identify a Part from a Sigma 75-300
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Last edited by Jules0770 on Wed May 02, 2012 6:32 pm, edited 1 time in total.
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Re: need to identify a Part from a Sigma 75-300
Jules, welcome to the forums, but you did not post a photo.
David
David
Re: need to identify a Part from a Sigma 75-300
Trying again to post so fingers crossed it will work, photo now attached
Thanks David
Thanks David
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Re: need to identify a Part from a Sigma 75-300
Sadly, I have no idea - I've never had one of those fall out of a lens. It looks like a circlip so if it is loose, something else will not be properly retained.
David
David
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Re: need to identify a Part from a Sigma 75-300
I have no idea what that part is, since I have no knowledge of the lens design details.
However, I have seen similar parts used in other applications as shims on a screw to adjust a clearance or dimension. IMO, such a use is not good design as the shim might drop out if the screw loosens. A precision washer would be much better in such an application, but a horseshoe shim does save assembly time during manufacture, since it is not necessary to completely remove the screw to make a change.
As I said above, I really do not know the purpose of this part, but if I were to be forced to guess I would vote for its usage as a shim.
With best wishes,
- Tom -
However, I have seen similar parts used in other applications as shims on a screw to adjust a clearance or dimension. IMO, such a use is not good design as the shim might drop out if the screw loosens. A precision washer would be much better in such an application, but a horseshoe shim does save assembly time during manufacture, since it is not necessary to completely remove the screw to make a change.
As I said above, I really do not know the purpose of this part, but if I were to be forced to guess I would vote for its usage as a shim.
With best wishes,
- Tom -
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