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SportsShooter.com: Member Message Board

Hood stuck, on Canon 300 2.8.....
Stan Cochrane, Photographer
Charlotte | NC | USA | Posted: 5:02 PM on 02.21.16
->> Cannot remove hood, locking screw completely functional. Hood will rotate, rattle, but will not come off. Do I disassemble via the 4 small screws around base, "or" other advise kindly received.
Thanks
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Kevin Krows, Photographer
Forsyth | IL | USA | Posted: 7:46 PM on 02.21.16
->> Stan - Can you take a long screwdriver and see if you can push the blade back as you turn the knob? Most likely there is some dirt or something causing the blade from fully retracting.

I've had the locking blade stick on me with both my 300 and 400 in the past and this is how I did it. Once the hood is off, I cleaned everything and shot a bit of WD-40 on the screw and wiped everything down good. I have also had to replace a broken locking assembly as well (caused by over tightening). Call Canon Service and they will get you the parts department.

Good luck.
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Stan Cochrane, Photographer
Charlotte | NC | USA | Posted: 5:31 PM on 02.22.16
->> Kevin,

Locking screw and blade were fully functional, blade completely retracted. I removed the hood from locking ring (4 small screws), and ring would not come off, but continued to wobble, rotate, lock down tight, etc.

I was finally able to remove by placing a flat head screw driver between locking ring and ridge below the rubber tip of lens, Took a little prying (no damage) but finally came off.

Does not appear to be bent (locking ring), so problem must be a dirty build up. What did you use to recondition the rubber rings? And I assume that was after cleaning with some rubbing alcohol?

Thanks
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Kevin Krows, Photographer
Forsyth | IL | USA | Posted: 5:42 PM on 02.22.16
->> Stan - For issues like that I have always used WD40 on a cloth as it does a good job of cleaning away junk. It's probably not what Canon recommends but it seems to work if I wipe it dry. I even clean the rubber focus rings on lenses and dirty build up on camera bodies with WD40 on a clean cloth.

I'm sure there are better ways but that's how I do it.
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Thread Title: Hood stuck, on Canon 300 2.8.....
Thread Started By: Stan Cochrane
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