anti water repellent on filter?


BBTM

Senior Member
Nov 23, 2004
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BB West
I was taking time lapse of the rain (under shelter but no window) and the rain water "attack" my fliter and caused the photos shown only the water droplets.

I saw those water repellent but will it damage the fliter coating? Thinking of using those and less water on my filter if same situation again.
 

you can try use rain x on a cheap filter.

even you using a water repellent agent on the filter, there will be still many tiny water droplets, they will only slide off if it is large enough. you may still have to use a blower to keep blow the water droplets off your filter.
 

Do have a cheap n spare filter for experiment. Cause rain water too much, might be clear off faster. Wondering can use on lenses and camera bodies or not, hmm...
 

I saw those water repellent but will it damage the fliter coating?

Quite possible, dunno if you've used Rain-x before, believe it contains solvents. The other question is whether it can be applied (or dries) without smearing and affecting clarity.

Recall reading that a hydrophilic (forces water into a thin film) coating is preferred instead of a hydrophobic (forces water to bead up) coating.

See:
http://petapixel.com/2013/09/16/tokina-rain-dispersion-filter-problem-keeping-rain-lens/
http://www.dpreview.com/articles/98...dispersing-filter-coating-and-ir-cut-nd-range
 

Rain-x and the others will not help much, big droplets will fall off, but smaller will still stay on, though it will definitely be easier to blow away with a blower like Catchlight had mentioned. Also, these coatings if not cleared thoroughly enough will cause flares or haziness under strong lights.
 

Btw, I Google "anti water repellant/repellent", got some nice product, :D Anyway, will try it one day on a cheap filter.