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Nizo Lens Hood Removal


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#1 Matt Kemp

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Posted 09 April 2008 - 12:33 PM

I have a Nizo 561, and want to be able to use filters to fit the 49mm thread. I machined a tool to let me unscrew the lens hood (a metal bar which fits into two small indentations in the inner collar of the hood), and I thought it would easily unscrew. However after doing three or four revolutions, and feeling like it's getting looser, it stiffens up and stops. I have applied some pressure to it, but it feels like it's somehow tightened again, and I don't want to force it.
I can't see a locking screw in the collar or anything like that.
Am I missing something, or has it just got jammed ny a piece of dirt or grit?
I've searched the web for any ideas, but I can't find anything. In fact in the five or so years I've been using a Nizo, I've never heard or seen anything about tools or techniques needed to get the hood off.
If anyone has successfully unscrewed a Nizo lens hood to allow use of the filter thread, any tips would be very helpful.
Cheers
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#2 Mike Rizos

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Posted 09 April 2008 - 01:25 PM

It's been a while since I had a Nizo, but the hood removes normally like unscrewing a filter. By your method, you are probably unscrewing the outer retaining ring that holds the front element in place. I think the hood is just stuck. Is it metal or rubber? Try turning it by the edge only, while holding the focusing barrel firmly.
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#3 Matt Kemp

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Posted 09 April 2008 - 01:49 PM

Mike,

Thanks for that, you were exactly right. I did of course try doing that first of all, and gave it a good old twist but with no luck. I guess it's that funny thing where you can't get something to work until someone tells you it definitely does work, and then.. It works.

Thanks again
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