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grease spot 07-07-2015 10:36

Tip for the (landscape) photographer
 
Kit for the lansdscape photographer:
Camera of choice
Suitable lens of choice
Sturdy Tripod of choice
Set of filters, notably a Neutral Density filter, for waterfalls and a Circular (Linear if not auto focussing) Polarizing filter.
Suitable elastic bands
Suitable tie-wraps (cable-ties).

This subject has been discussed before ... how do you separate two screw filters that have decided to enjoy each other's company for ever after?

Carefully put some graphite from a pencil on the threads before connecting - minor chance of dust on the filter / lens.

Place the filter face down on a piece of (chamois) leather and carfeully press down on the other filter to twist them apart - the polarising filter just spins around and refuses to divorce its new found mate. With two neutral density filters bound together the serrated edge of the filter that is supposed to provide some tactile grip, instead grinds a beautiful hole in your chamois.

In the winter your hands are dry so you wash them to add a bit of damp to the finger tips for extra grip. After hours wrestling with the filters your hands are no longer dry but profusely pouring sweat out of the tiny pores in your paws. You've no longer got grip, no matter how hard you grip the filters. Unfortunately all you are likely to be doing is slightly deforming the filter ring(s) so that they remain firmly bound together.

By now you've guessed that the elastic bands and tie-wraps work together to separate this loving couple. The rubber of the elastic band provides the grip around the filter and the tie wrap mounted over the rubber band provides an even pressure around the filter to stop the filter ring deforming. More than likely this will persuade the two to separate quite amicably, and you will wonder why you struggled so hard.

The tie wraps are not necessary in most circumstances but just a gentle presure of the fingers spread evenly on the rubber bands around each filter.

A thin piece of string wound round the filters like a tourniquet instead of the tie wraps also works but is difficult to control.

(tried and delibrately tested several times on some stubborn rotating filter pairs defore I committed this to a tip).

Hope it helps.

Boofers 12-10-2015 01:15

Re: Tip for the (landscape) photographer
 
Wow Graham very timely and well done overview on these rings that stick. The part about useing very light pressure then twist, most of the time this works for me. You covered this very well. :D. Also I am leary of the graphite leaded pencil. Althought it is good an idea for lube to keep unstuck. I would suggest that after you apply the pencil around your threads lightly one time at an up wright side angle, wipe the threads once around with a soft cloth or better a cotton ear swab. Then twist the new coupling togather slowly going back and forth to burnish the thread fit. I do this last part twisting back and forth lightly to break the hard paint, usally the cause as they are hard painted which makes a tight fitting thread. Doing a test with metal rings at first start they are started, then use one finger to spin, if easy to spin all the way down and back up they should never stick. Remember the graphite will still work very well after a wipe around, alitte bit goes a long way and you have a good chance of keeping it off your lenses. I blow these with a good size ear syringe. Thanks again Graham as we all know and dislike sticky threads. :thumb:


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