What do filters do?

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ppp

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What would a UV or a polarising filter do, or even a coloured one?

and...

do i need one?

I have a D50 with lit lens and a 70-300mm that takes a 62mm screw on filter.

I have seen a few bits about them but wondered if i would benefit from having one, i mainly want to photograph sports and landscape/type pictures
 
sorry thought i was posting in cameras and lenses section can someone move it for me, thanks
 
Being a novice on this area too, I have been given advice by my father-in-law and also seen it on lots of websites, to get skylight filters.
The main reason for these (anybody correct me if i'm wrong) is to protect your glass, i.e. scratch the filter and it'll cost you another £10-15, scratch the glass and your talking big bucks. Regarding the others you mention, i'll step aside and let the big boys answer that one.
 
uv ones also reduce a little haze

polarisers tend to deepen colours, esp blue skies and get rid of reflections

coloured ones are used to warm or cool photos and deeper colours were used in black and white photography to emphasise different tones by changing the recorded light.

sorry for the quick reply, im off to work.
 
I would suggest getting a UV filter to protect the lens and a circular polariser for occasional effect use. It's worth noting that a CP filter is fairly dark so will significantly reduce the amount of light entering the camera.

BTW, never use them at the same time.
 
have a look at this Covers the basics pretty well.
 
evilowl said:
They will get jammed together and become a b*tch to seperate
Click to expand...

A quick tip...before you put any filters on the camera lens or on another filter, if you draw around the filter threads with a pencil, the graphite acts as a lubricant and will allow for easy unscrewing when you wish to seperate them.

Make sure you blow any residue away after drawing and before screwing though ;)
 
Steve said:
A quick tip...before you put any filters on the camera lens or on another filter, if you draw around the filter threads with a pencil, the graphite acts as a lubricant and will allow for easy unscrewing when you wish to seperate them.
Click to expand...

Another good tip if they do get stuck is to hold the filter flat against something like a fairly flat rubber shoe sole and twist. The rubber gives an even grip and presure to the twist and this will usually undo the most stubborn filters easily.

This public service broadcast has been brought to you by my old college teacher. :D
 
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