Hi,
Henri wrote:
Getting the ring off is the tough part, I pretty much destroyed mine when I did it.
Get hold of a rubber bung that is wide enough to place on the front of the lens and touch the ring all round the front element, just narrower than the filter threads. Homebrewing supply shop would be a good source. 8-)
Cut a couple of circles of lens tissue and put them on the front element. Press the bung down onto the ring and turn it, just like you were trying to get the lid off a glass jar. The only rings that won't come off like this, in my experience, are the ones in damaged filter threads. You will need to repair the threads first. Reverse the procedure to reinstall.
You need the lens tissue to protect the front element. Even if the rubber does not have some form of grit incorporated, it may have picked up something nasty before you get hold of it. Two layers will normally be enough but more will not be overkill.
To alleviate the grit problem entirely, you could try to get hold of some thickwalled rubber tubing of an appropriate diameter. I use rubber spheres, sliced at various points to give me a selection of ring faces, because I have a ready supply of them.
mike
CITY OF SUNDERLAND COLLEGE DISCLAIMER
Confidentiality: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If they come to you in error you must take no action based on them, nor must you copy or show them to anyone; please reply to this email and highlight the error.
Please note that the views or opinions presented in this email are solely those of the author and do not necessarily represent those of the college.
Security Warning: Please note that this email has been created in the knowledge that Internet email is not a 100% secure communications medium. We advise that you understand and observe this lack of security when emailing us.
Viruses: Although we have taken steps to ensure that this email and attachments are free from any virus, we advise that in keeping with good computing practice the recipient should ensure thay are actually virus free.
