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Archive 2013 · 500L II hood cracked when tightening nut - not covered ?
  
 
mah4ever
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p.1 #1 · p.1 #1 · 500L II hood cracked when tightening nut - not covered ?


Was tightening the hood nut, and then crunch - the hood casing cracked ! The
crack forms about a 1 inch circle around the nut. Next time I have a chance
I'll try to get a photo of this uploaded. Nothing unusual was occurring - was
applying just a normal amount of force.

Very similar thing happened to the hood on my 300L II. Canon replaced it under
warrantee. For the 500L II, they are saying it's not covered (even though the lens
is well within the 1 year warrantee).

Anyone else have this happen on the 500II ? Any thoughts on dealing with
Canon service ?

Thx.



Mar 25, 2013 at 10:24 AM
chez
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p.1 #2 · p.1 #2 · 500L II hood cracked when tightening nut - not covered ?


Does not sound like a warranty issue to me. You put too much pressure on the hood and it broke. If this also happened on the 300, then I suspect your technique of putting the hood on is suspect.


Mar 25, 2013 at 12:22 PM
mah4ever
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p.1 #3 · p.1 #3 · 500L II hood cracked when tightening nut - not covered ?


Maybe I guess,.. but hard to imagine what I could be doing wrong. Just tightened the nut, until it started to get snug. Didn't keep tightening until it was tough to turn. Have had no problems with any other hood other than the 300II (I've had experience with many of them, including the old 300, old 500, and old 800).


Mar 25, 2013 at 01:05 PM
AGeoJO
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p.1 #4 · p.1 #4 · 500L II hood cracked when tightening nut - not covered ?


The hood is held by the groove of the lens. There is really no need to tighten the nut with force at all. I normally just turn it until I feel the first resistance. So far, not a single time has any hood popped out by doing just that. To answer your question, no, it hasn't happened to me with any of my superteles in the last 10 years and not with the Mark IIs either more recently. Knock 3X.


Mar 25, 2013 at 01:14 PM
PetKal
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p.1 #5 · p.1 #5 · 500L II hood cracked when tightening nut - not covered ?


As Joshua wrote, the locking nut should be fingertip tightened lightly.....not so much to positively secure the hood, but to prevent the nut from undoing itself.
However, I am having a difficulty accepting that the hoods would crack as a result of application of reasonable amount of locknut tightening. However, one never knows....perhaps there is a material weakness in the MkII hoods. They sure made them much lighter, I hope that hasn't resulted in undue fragility.



Mar 25, 2013 at 05:36 PM
sivrajbm
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p.1 #6 · p.1 #6 · 500L II hood cracked when tightening nut - not covered ?


They may be a little more plastic now than carbon fiber...


Mar 25, 2013 at 05:46 PM
jaybird555
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p.1 #7 · p.1 #7 · 500L II hood cracked when tightening nut - not covered ?


The design of the Canon lens hoods for the big teles needs to be upgraded, IT STINKS.


Mar 25, 2013 at 06:01 PM
Pixel Perfect
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p.1 #8 · p.1 #8 · 500L II hood cracked when tightening nut - not covered ?


Canon has switched over to the inferior Farbon Kyber, a lesser known clone material from China.


Mar 25, 2013 at 08:38 PM
lowa2
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p.1 #9 · p.1 #9 · 500L II hood cracked when tightening nut - not covered ?


Pixel Perfect wrote:
Canon has switched over to the inferior Farbon Kyber, a lesser known clone material from China.


I really laughed at that one!



Mar 25, 2013 at 09:03 PM
jaybird555
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p.1 #10 · p.1 #10 · 500L II hood cracked when tightening nut - not covered ?


lowa2 wrote:
I really laughed at that one!

I also laughed my ass off on this one



Mar 25, 2013 at 09:33 PM
 

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mah4ever
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p.1 #11 · p.1 #11 · 500L II hood cracked when tightening nut - not covered ?


Thx for the replies folks. Sounds like I may tighten the nut a little tighter than
some of you. I try to tighten just enough to stop the hood from being
loose and spinning around (which may be slightly more tight than the point
at which it just becomes secure from falling off).

Nevertheless, to me, a lens with this price tag, should be designed to handle this.
I'll be discussing with Canon service in more detail.



Mar 25, 2013 at 10:47 PM
PetKal
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p.1 #12 · p.1 #12 · 500L II hood cracked when tightening nut - not covered ?


mah4ever wrote:
I'll be discussing with Canon service in more detail.


Talk to Patty Fellows, she is their Service manager.
Do not get involved with their Technical support.....they know very little, have no real authority, and serve only as customer issue obfuscators.

If the Service dept. can not help you, go straight to the top of their organisation......when there is a problem, that is often the only way to deal with it effectively.



Mar 25, 2013 at 10:54 PM
Breitling65
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p.1 #13 · p.1 #13 · 500L II hood cracked when tightening nut - not covered ?


Pixel Perfect wrote:
Canon has switched over to the inferior Farbon Kyber, a lesser known clone material from China.


I also find that most "Farbon Kyber" things are just regular plastic painted to look like real. On Ebay it is 99% "Kaka Fiber"



Mar 25, 2013 at 11:57 PM
gpchase
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p.1 #14 · p.1 #14 · 500L II hood cracked when tightening nut - not covered ?


I don't know about you guys but I always leave the fibreglas tape on the inside of the clamp as it adds as a shim/buffer and also aids in avoiding marks made to the rubber hood trim from the bare clamp..


Mar 26, 2013 at 12:05 AM
PetKal
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p.1 #15 · p.1 #15 · 500L II hood cracked when tightening nut - not covered ?


gpchase wrote:
I don't know about you guys but I always leave the fibreglas tape on the inside of the clamp as it adds as a shim/buffer and also aids in avoiding marks made to the rubber hood trim from the bare clamp..


+1
Exactly....that is why Canon puts it there.



Mar 26, 2013 at 12:15 AM
JohnBrose
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p.1 #16 · p.1 #16 · 500L II hood cracked when tightening nut - not covered ?


I've tightend the screw on my 300 is pretty well and haven't had any problems. I would think Canon would stand behind their design with the absolute ridiculous prices of the shades on the super teles.


Mar 26, 2013 at 12:41 AM
jcolwell
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p.1 #17 · p.1 #17 · 500L II hood cracked when tightening nut - not covered ?


gpchase wrote:
I don't know about you guys but I always leave the fibreglas tape on the inside of the clamp as it adds as a shim/buffer and also aids in avoiding marks made to the rubber hood trim from the bare clamp..

PetKal wrote:
+1
Exactly....that is why Canon puts it there.


Glad you guys mentioned that. I haven't checked mine in a while. The gaffer's tape I use on my 200/1.8L hood lugs had worn through on all five of the lugs on that hood. The original fibreglass tape on my 500/4L IS hood was also worn through, and that on my 300/2.8L IS hood was completely gone. I upgraded all of them to Lee Valley duct tape. Finest kind!



Mar 26, 2013 at 12:44 AM
PetKal
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p.1 #18 · p.1 #18 · 500L II hood cracked when tightening nut - not covered ?


jcolwell wrote:
Glad you guys mentioned that. I haven't checked mine in a while. The gaffer's tape I use on my 200/1.8L hood lugs had worn through on all five of the lugs on that hood. The original fibreglass tape on my 500/4L IS hood was also worn through, and that on my 300/2.8L IS hood was completely gone. I upgraded all of them to Lee Valley duct tape. Finest kind!


Gotta check that one out.



Mar 26, 2013 at 12:50 AM
EB-1
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p.1 #19 · p.1 #19 · 500L II hood cracked when tightening nut - not covered ?


I've had similar problems with my Nikkors, but not yet with a Canon lens. Cheap designs.

EBH



Mar 26, 2013 at 01:34 AM
AGeoJO
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p.1 #20 · p.1 #20 · 500L II hood cracked when tightening nut - not covered ?


The front end of the lens barrel that contains the groove for securing the lens hood is made out of white painted metal in the Mark I lenses. Yes, after awhile the paint may be rubbed off and/or darkish (glue?) residues from tape are left in groove. The orange peal surface of the paint adds to the "filthy" appearance of the groove. The Mark II lenses have a black polycarbonate front piece instead and not only it shaves more weight, relative to that of the Mark I counterpart, but the darkish glue residues are not visible anymore and the polycarbonate piece is smoother than the painted surface.


Mar 26, 2013 at 01:38 AM
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