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Archive 2008 · Focus Screen Shims/Washers for Canon 5D
  
 
Mike Ganz
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p.1 #1 · p.1 #1 · Focus Screen Shims/Washers for Canon 5D


Some folks have had some difficulty in tracking down focus screen shims from Canon. One reason they're hard to google is that Canon refers to them as "washers". There are eleven different shims, which vary in thickness. They do not come in a set; they must be purchased individually. Luckily, they're inexpensive (~$22 USD for all). I spoke directly to a Canon parts department rep yesterday and here are the part numbers (note that these are for the 5D...I neglected to ask if they were applicable to any other body). My guess is that the part number suffix pertains to the thickness of the washer in mils (again, in my state of glee that I found these things, I didn't ask that either):

CB3-2850-000-003
CB3-2850-000-005
CB3-2850-000-008
CB3-2850-000-010
CB3-2850-000-012
CB3-2850-000-015
CB3-2850-000-018
CB3-2850-000-020
CB3-2850-000-025
CB3-2850-000-028
CB3-2850-000-030

Also, if anyone needs the direct line phone number to the Canon Parts Department, here it is: 732-521-7230


Edited on Nov 04, 2008 at 10:43 PM · View previous versions



Nov 04, 2008 at 10:06 PM
PhotoMaximum
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p.1 #2 · p.1 #2 · Focus Screen Shims/Washers for Canon 5D


Cool. Thanks Mike!

Max



Nov 04, 2008 at 10:31 PM
PhotoMaximum
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p.1 #3 · p.1 #3 · Focus Screen Shims/Washers for Canon 5D


Placed my order...

I think we should all start calling these things by the official Canon name of "washers" instead of shim as this might make searching threads in the future less confusing...



Nov 04, 2008 at 10:40 PM
Mike Ganz
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p.1 #4 · p.1 #4 · Focus Screen Shims/Washers for Canon 5D


PhotoMaximum wrote:
Placed my order...

I think we should all start calling these things by the official Canon name of "washers" instead of shim as this might make searching threads in the future less confusing...


Good point, Max...I edited the title to indicate both terms.



Nov 04, 2008 at 10:44 PM
jjlphoto
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p.1 #5 · p.1 #5 · Focus Screen Shims/Washers for Canon 5D


Maytag washers are the best, IMO.


Nov 04, 2008 at 10:45 PM
PhotoMaximum
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p.1 #6 · p.1 #6 · Focus Screen Shims/Washers for Canon 5D




I don't know. I think my my Kenmore washer renders my jeans with more "clarity" and "3-D drawing power..."




Nov 04, 2008 at 10:48 PM
cogitech
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p.1 #7 · p.1 #7 · Focus Screen Shims/Washers for Canon 5D


Canon's wrong. They're shims.


Nov 05, 2008 at 01:15 AM
StevenPA
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p.1 #8 · p.1 #8 · Focus Screen Shims/Washers for Canon 5D


cogitech wrote:
Canon's wrong. They're shims.




Excellent info, by the way. I'm going to see if I can get some of these!



Nov 05, 2008 at 03:06 AM
 

Search in Used Dept. 



Mike Ganz
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p.1 #9 · p.1 #9 · Focus Screen Shims/Washers for Canon 5D


Mine were delivered today...just need to find some time to start the trial and error process.


Nov 05, 2008 at 10:02 PM
RT v Genugten
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p.1 #10 · p.1 #10 · Focus Screen Shims/Washers for Canon 5D


...so, these washers are necessary to install non-canon focus screens me thinks??



Nov 05, 2008 at 10:16 PM
tmessenger
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p.1 #11 · p.1 #11 · Focus Screen Shims/Washers for Canon 5D


If it's back focusing add shims if its front focusing remove shims.


tm



Nov 05, 2008 at 11:19 PM
cogitech
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p.1 #12 · p.1 #12 · Focus Screen Shims/Washers for Canon 5D


RT v Genugten wrote:
...so, these washers are necessary to install non-canon focus screens me thinks??


...any focus screen, Canon or not, needs to be tuned this way.



Nov 05, 2008 at 11:23 PM
PhotoMaximum
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p.1 #13 · p.1 #13 · Focus Screen Shims/Washers for Canon 5D


Mike Ganz wrote:
Mine were delivered today...just need to find some time to start the trial and error process.



As you are one step ahead of me I am looking forward to reading how this process goes for you: very well I hope...




Nov 06, 2008 at 12:13 AM
Cableaddict
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p.1 #14 · p.1 #14 · Focus Screen Shims/Washers for Canon 5D


Thanks, Mike, this is great.

-But do I now have to refer to this procedure as "washering" my focus screen?



Nov 23, 2008 at 08:32 PM
Orio
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p.1 #15 · p.1 #15 · Focus Screen Shims/Washers for Canon 5D


Could anyone please point me to a shop or seller (preferably in Europe, but any will do) that are selling them? I don't seem to be able to find any.

Thank you in advance



Mar 18, 2009 at 01:08 PM
kf_tam
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p.1 #16 · p.1 #16 · Focus Screen Shims/Washers for Canon 5D


Hi Mike,
I have seen several service manuals and part catalogues of EOS camera/lens on the web. Similar codes are used to refer to thickness in millimeters.
i.e.,
003 = 0.03 mm
005 = 0.05 mm
etc.


Mike Ganz wrote:
....
My guess is that the part number suffix pertains to the thickness of the washer in mils (again, in my state of glee that I found these things, I didn't ask that either):

CB3-2850-000-003
CB3-2850-000-005
CB3-2850-000-008
CB3-2850-000-010
CB3-2850-000-012
CB3-2850-000-015
CB3-2850-000-018
CB3-2850-000-020
CB3-2850-000-025
CB3-2850-000-028
CB3-2850-000-030

Also, if anyone needs the direct line phone number to the Canon Parts Department, here it is: 732-521-7230




May 09, 2009 at 07:46 AM





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