View single post by chrisbet
 Posted: Fri Mar 22nd, 2019 09:15
chrisbet



Joined: Thu Feb 7th, 2019
Location: Leigh On Sea, Essex , United Kingdom
Posts: 1402
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 Following up your post I looked into my 55-200 lens to see if I could determine any internal reflections from the cokin filter fitted by its previous owner. I couldn't so thought I would remove the filter - it was stuck solid!

So I tried the rubber band trick - not moving. I tried a rubber bottle lid gripper thing we have for getting tops off jars and that didn't work despite having the mechanical advantage of a "handle".

Thinking about the very fine threads involved I wondered if they were damaged in some way and tried gently tapping round the filter with a light screwdriver shaft held at a 45 degree angle to keep it well clear of the glass - just tapping the serrated edge of the filter ring - after a couple of rounds of tapping the filter just unscrewed easily - maybe the vibration loosened its grip?



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