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Well, my new filter has arrived but i cant use it at present :-(
That said, it has an oring inside the pack as well, and "appears" to have different coloured faces ( i havent fully opened the packaging yet )
Sooooo
is the oring used on reassy to hold it steady
what way round does the filter go, ie can it go in either way round or must one side face the incoming light cone.
Andrew
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