Tightening Canon 100-400 Lens Hood

I know there is a lot of criticism of the lens hood on the 100-400. Mine used to be tight and hard to put on and remove. Now it is loose, turning very easily. I am concerned that it will turn inadvertently and fall off. I do not want to lose it.

Does anyone have any idea on how to tighten the hood? The best I could come up with was to drill a small hole in the edge and place a small set screw which could be tightened down. This would be similar to the hood attachment on my 500 f4, but would only have one small point of interaction with the barrel of the lens. I did not want to do this before I checked here for any other option.

Thanks

you can buy cheap knockoff ones on ebay

that hood has to be the worse one of any lens I have owned... or ever seen for that matter

you sure one of the tabs did not break off? I had that happen on my first one and it was lose afterwards

Thanks Jamie for the input. Yes, the tabs are all there, but pretty worn.

actually I just realized the canon one is only 40 bucks on amazon, but you can get the ripoffs for 10 bucks on ebay, the only question is do they have the felt inside the hood? hard to tell

and i guess the other thing is it the hood or the ring on the lens thats the issue, might be best to try someone elses hood if you can before you buy one :)

Thanks again Jamie. Good idea to try another hood to see if it is the hood or lens.

I lost mine and bought a Mamiya hood to replace it. It is rubber and folds back when not in use and the lens can be stored with it in place. If I remember correctly I got it from B&H.

I had a similar problem with my lens hood on the Nikon 300mm f/2.8 AF-S I lens hood (HK-22). The set screw was stripped prior to my purchase of it. While waiting for the replacement parts, I used some gas pipe thread tape (available at Lowes and Home Depot) (see http://www.lowes.com/lowes/lkn?actio...06-PSC1097%20L). It is a very thin tape that provided just enough resistance to allow the screw to set. I was pleasantly surprised at how well it worked.

Bill, thanks for the great idea. On my way to Lowes tomorrow!!

Exact same problem here with my 100-400 lens hood, very loose. I bought a cheap knock-off from eBay that does fit tightly again, but as mentioned lacks the felt lining on the inside so could have some reflection of light down the hood. At least I know that it is the hood that is worn and not the lens thread.

I tried tape but it soon gets mangled if taken on and off. So will be interested in any other ideas.

My next move is to attack the Canon hood with a soldering iron to melt some plastic along the groove to restore resistance.

I had the same problem with one of the earlier lenses and when I compared my hood with a friends hood I found that the "stops" had worn allowing the hood to rotate and possibly fall off. I cured the problem by applying three small blobs of quick setting araldite epoxy adhesive using a cocktail stick to re-build the "stops". This provided a permanent cure for the problem at virtually no cost.

Since then I have replaced this lens with a newer version which I found gave much sharper results in side by side tests and the current hood has not worn yet and also appears to be a better fit than the earlier version. If the problem re-appears, I will have no hesitation in applying the same cure.

Barry, I had come to the same conclusion from looking at the old and new one - and the same proposed solution. Araldite sounds ideal, as it is better for the hood to wear than the thread on the lens (so the stops shouldn't be of a harder material than the lens)

I had similar problems with loose hood in my 100-400. I put a thin rubber band to the lens into the groove where the hood attached. Now hood stays very well in place and do not rotate.

Best solution is buying a Mamiya RB 67 Lens hood, its 77mm rubber and collapsable, have been using for years since I don't like the Canon hood. Besides falling off its inconvenient to carry

The part number is Mamiya M77 No2