fbpixel

Moderators: E.J. Peiker, Greg Downing

All times are UTC - 5 hours

  
« Previous topic | Next topic »  
Reply to topic  
 First unread post  | 4 posts | 
by Connor Stefanison on Sun Dec 04, 2011 7:34 pm
User avatar
Connor Stefanison
NANPA Scholar
Posts: 1233
Joined: 20 Oct 2009
Location: Burnaby, BC, Canada
I"m not sure if this is common knowledge but i'll post it anyways incase there are some of you who are unaware of this.

The lens collar on my canon 500/F4 has been kinda stiff for a little over a year. I never knew why, and I remember reading other posts about people being unhappy with their non-fluid collars.

I recently bought a lenscoat for the 500, and in the instructions, it says to take the lens collar foot off since it makes it way easier. I did this, then after put it back on. A few minutes later the collar jammed and would only move an inch both ways. I was scared that it was broken and i'd have to send it in.

I took the lens collar foot off again, and found that one of the little screws in there that holds the super tiny bearing casings on was very very loose (the screw was so high which stopped the collar movement). So basically I tightened it up, and checked all the other bearing screws and they were all loose too. After tightening them all up and putting the foot back on, the lens collar felt like new. The original fluid collar feel was restored!

So, if your collar is a bit stiff, simply just tighten up the little screws. Hope this helps!
 

by ajq on Mon Dec 05, 2011 7:37 pm
User avatar
ajq
Forum Contributor
Posts: 164
Joined: 18 Sep 2006
Location: Fairfax Station, Virginia
Member #:01396
Is there any benefit to a bit of lubrication applied to the roller bearings inside the lens collar? Any harm?

Regards,
TonyQ
 

by ChrisRoss on Mon Dec 05, 2011 8:09 pm
ChrisRoss
Forum Contributor
Posts: 12681
Joined: 07 Sep 2005
Location: Sydney, Australia
The bearings appear to be marginally sized for the service, there have been articles posted elsewhere in replacing them with improved bearings. A good idea is to apply loctite to the screw to prevent it loosening, you want the grade that allows you to undo the screw.

Lubrication probably wouldn't help, you can only apply it to "open" bearings, that is without a seal/coverplate. Only problem is that the lubrication then is not contained and is prone to picking up grit and dust. The article I referred to above was how to replace bearings on a 400mm f2.8 collar, that showed the bearings as being open. I seem to recall when I installed my lens foot on my 500mm f4 that the bearings were closed/sealed type.
Chris Ross
Sydney
Australia
http://www.aus-natural.com   Instagram: @ausnaturalimages  Now offering Fine Art printing Services
 

by Steve Cirone on Tue Dec 13, 2011 9:13 pm
User avatar
Steve Cirone
Lifetime Member
Posts: 2230
Joined: 29 May 2005
Location: El Cajon, California
Member #:00583
All you have to do is get an 800mm. They have a huge collar that doesn't hang up. Never mind the $13,000+
 
DAILY IMAGE GALLERY:  https://www.facebook.com/steve.cirone.1

 IMAGE GALLERY ARCHIVES WITH EXIF: https://www.flickr.com/photos/stevecirone/
 

Display posts from previous:  Sort by:  
4 posts | 
  

Powered by phpBB® Forum Software © phpBB Group