Filter glass rotating when wiped with microfibre cloth


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song

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Feb 23, 2002
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#1
Hi friends,

I need technical advise. I have a UV filter which i always clean after a day of shooting. Normally, when i wipe, the filter glass will not rotate.

However, recently, the glass starts to rotate during wiping motion. It is loose. How can i tighted the clamping ring? I see a thin ring at the edge with a flat line groove. Is this the ring to tighten? How to do it without damping the filter glass?

Or is the filter spoilted?

please help
song
 

Octarine

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Staff member
Jan 3, 2008
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#2
Why do you need to wipe your filter after each shooting? I don't even need a blower for dust and I'm outdoor most of the time. Be a bit more careful and stop wiping your filter like that. You won't notice any dust on filters later in your pictures (unless it's forming already a civilization).
 

DeadEnd

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Nov 24, 2006
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#3
Why wipe when it is not neccessary? Even there is dust, just blow it off will do. Frequent wiping will wear of the multi-coating on the filter.

There is no way to tighten it. Just live with it or use glue to fix it.
 

song

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Feb 23, 2002
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#4
water stains on filter will not appear on the pic? how come dirty filter would not affect pic quality ? I thought the surface of the filter is very important and that is why we are buying premium multicoated filters. Please educate
 

Octarine

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Jan 3, 2008
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#5
Please read! Use Google and you'll find hundreds of pages.
Dust will not appear in the images, as long as it's not forming a full layer. So you don't need to worry about a few dust particles. Blow them away, leave them - no difference.
The multi-coating is to prevent reflections. Since the filter is a plain surface it is prone to create reflections that appear in the image as ghosting later. In addition, manufacturer also try to make surfaces less sticky for dust and dirt. B+W hits the target, filter cleaning is easy and doesn't need much efforts. Hoya fails badly, cleaning their UV filters is PITA.
But the main question is: why do you need to rub your filters always? Be more careful to avoid stains. Also, dry rubbing with your microfiber cloth is a good chance to create scratches. Dust particles might be small but can be very hard. Dried water stains can contain a lot of dust. if you get stains then remove them ASAP, don't let them dry.
Something to read: http://www.kenrockwell.com/tech/cleaning.htm
 

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