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Nov 25, 2011 17:40:14   #
omnila
 
Hi every one hope ya had a good turkey day. I need some help i inherited some 52mm filters 1 is an ARAGON 1a and the other is a HOYA CS does any one know what these are used for?

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Nov 25, 2011 17:47:00   #
JimH Loc: Western South Jersey, USA
 
They screw on to the front of a 52mm-diameter front lens element and provide some visual alteration to the light entering the lens. Are they colored? What color? The HOYA is a well known and respected brand, but I do not know about the other. Not sure what the CS stands for.

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Nov 25, 2011 17:55:33   #
chapjohn Loc: Tigard, Oregon
 
I think the 1A is also called a skylight filter. It is basically a protection of the actual lens itself. Better to scratch an in expensive filter than to scratch that lens itseld as the filter can be replaced easily avoiding the high cost of a new lens.
The Hoya CS is a "center spot" filter which is a version of the diffusion filter. The CS filter will keep the center of the picture sharp and clear while the rest of the picture will be softer and less clear. This is a special effects filter.

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Nov 25, 2011 18:02:36   #
JimH Loc: Western South Jersey, USA
 
There ya go! Thanks Chap - they sound like filters designed for film cameras, no?

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Nov 25, 2011 18:03:38   #
omnila
 
your right chap john and i thank you, i guess the cs is like a lens baby kind of? I guess i'll put the 1A on my 85mm micro for perfection.thanks again

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Nov 25, 2011 18:56:45   #
saside Loc: live in pueblo co
 
a1 is a europian equal to an americian 81A changes exposure by 1/3 tends to "warm" the blue sky light yes n it's a pinkish hue

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Nov 25, 2011 23:48:56   #
chapjohn Loc: Tigard, Oregon
 
saside, did I get it mixed up with another similar designation? Thank you for the correction.

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Nov 26, 2011 00:52:20   #
saside Loc: live in pueblo co
 
chapjohn wrote:
saside, did I get it mixed up with another similar designation? Thank you for the correction.


Well thank you, but it is called a "skylight filter" by some I just added a bit more details.

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Nov 26, 2011 08:10:47   #
Indi Loc: L. I., NY, Palm Beach Cty when it's cold.
 
I thought a CS was a Cross Screen or Star filter which creates a star pattern from a point of light in your image?

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Nov 26, 2011 10:00:12   #
gessman Loc: Colorado
 
Not to be contradictory but different manufacturers occasionally use the same terms to describe different equipment but generally CS = Cross Screen also known as a "star" filter. When screwed onto the front of a lens it causes star points to radiate out from reasonably bright light sources such as street lights or sun reflections in car fenders, off of chrome, etc. I have filters for 4, 6, or 8 star points and one that's variable so I can put the points where I want them.

A skylight filter was designed to reduce haze from infra red light naturally emitted from the sun. UV for ultra-violet, 1A for IR. Both rays drastically affected film, causing it turn blue and hazy, especially at higher altitudes, the higher, the more the effect. You do not shoot film in or around Denver without them. These filters were to keep that from happening. Digital is either not or is less affected by IR and UV. Both filters came to be more used for "protection" than to cut the IR and UV. Be careful about putting them on your camera - they potentially become the "weakest link" due to the fact that the quality of the glass is often not up to the quality of your lens and they can cause degradation of your images. I have heard of these filters saving lens but very rarely. The big advantage of using them as protection is not for when you drop your lens, it's for when you have dirt on the surface that needs cleaning. Repeated cleaning of your lens can remove the multiple coating that is there which can cause you to gradually get more and more lens flare which ruins your pictures. By having that filter on, you clean the filter and don't affect the lens. I DO NOT use these filters. I personally think that whatever protection they offer is minimal and I don't want the objects between my lens and my subject, nor do I think most people do not who are picky about their images. I would suspect the number of lens that have been saved by a filter is extremely negligible. The filter manufacturers would not like me saying that.

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Nov 26, 2011 11:12:16   #
skidooman Loc: Minnesota
 
That's what CS means on my Hoya filter.
Indi wrote:
I thought a CS was a Cross Screen or Star filter which creates a star pattern from a point of light in your image?

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Nov 26, 2011 11:56:33   #
whitewitch Loc: Buffalo NY
 
gessman wrote:
Not to be contradictory but different manufacturers occasionally use the same terms to describe different equipment but generally CS = Cross Screen also known as a "star" filter. When screwed onto the front of a lens it causes star points to radiate out from reasonably bright light sources such as street lights or sun reflections in car fenders, off of chrome, etc. I have filters for 4, 6, or 8 star points and one that's variable so I can put the points where I want them.

A skylight filter was designed to reduce haze from infra red light naturally emitted from the sun. UV for ultra-violet, 1A for IR. Both rays drastically affected film, causing it turn blue and hazy, especially at higher altitudes, the higher, the more the effect. You do not shoot film in or around Denver without them. These filters were to keep that from happening. Digital is either not or is less affected by IR and UV. Both filters came to be more used for "protection" than to cut the IR and UV. Be careful about putting them on your camera - they potentially become the "weakest link" due to the fact that the quality of the glass is often not up to the quality of your lens and they can cause degradation of your images. I have heard of these filters saving lens but very rarely. The big advantage of using them as protection is not for when you drop your lens, it's for when you have dirt on the surface that needs cleaning. Repeated cleaning of your lens can remove the multiple coating that is there which can cause you to gradually get more and more lens flare which ruins your pictures. By having that filter on, you clean the filter and don't affect the lens. I DO NOT use these filters. I personally think that whatever protection they offer is minimal and I don't want the objects between my lens and my subject, nor do I think most people do not who are picky about their images. I would suspect the number of lens that have been saved by a filter is extremely negligible. The filter manufacturers would not like me saying that.
Not to be contradictory but different manufacturer... (show quote)


Hi Gessman, I hope you had a nice Thanksgiving.

I'm glad you wrote about this because I was going to purchase some of these but you seem to think more glass on the lens will degrade the quality of the photo? It sounds like it's not necessary to use them since most people aren't using film anymore. I had been considering using them for waterfalls and ocean shots. You think I should save my money then?

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Nov 26, 2011 12:51:33   #
docrob Loc: Durango, Colorado
 
chapjohn wrote:
I think the 1A is also called a skylight filter. It is basically a protection of the actual lens itself. Better to scratch an in expensive filter than to scratch that lens itseld as the filter can be replaced easily avoiding the high cost of a new lens.
The Hoya CS is a "center spot" filter which is a version of the diffusion filter. The CS filter will keep the center of the picture sharp and clear while the rest of the picture will be softer and less clear. This is a special effects filter.
I think the 1A is also called a skylight filter. ... (show quote)


google is your friend

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Nov 26, 2011 13:02:15   #
saside Loc: live in pueblo co
 
gessman wrote:
Not to be contradictory but different manufacturers occasionally use the same terms to describe different equipment but generally CS = Cross Screen also known as a "star" filter. When screwed onto the front of a lens it causes star points to radiate out from reasonably bright light sources such as street lights or sun reflections in car fenders, off of chrome, etc. I have filters for 4, 6, or 8 star points and one that's variable so I can put the points where I want them.

A skylight filter was designed to reduce haze from infra red light naturally emitted from the sun. UV for ultra-violet, 1A for IR. Both rays drastically affected film, causing it turn blue and hazy, especially at higher altitudes, the higher, the more the effect. You do not shoot film in or around Denver without them. These filters were to keep that from happening. Digital is either not or is less affected by IR and UV. Both filters came to be more used for "protection" than to cut the IR and UV. Be careful about putting them on your camera - they potentially become the "weakest link" due to the fact that the quality of the glass is often not up to the quality of your lens and they can cause degradation of your images. I have heard of these filters saving lens but very rarely. The big advantage of using them as protection is not for when you drop your lens, it's for when you have dirt on the surface that needs cleaning. Repeated cleaning of your lens can remove the multiple coating that is there which can cause you to gradually get more and more lens flare which ruins your pictures. By having that filter on, you clean the filter and don't affect the lens. I DO NOT use these filters. I personally think that whatever protection they offer is minimal and I don't want the objects between my lens and my subject, nor do I think most people do not who are picky about their images. I would suspect the number of lens that have been saved by a filter is extremely negligible. The filter manufacturers would not like me saying that.
Not to be contradictory but different manufacturer... (show quote)


Gessman your photographic knowledgr is encyclopedic. You have tought me many things. On a side note hi from the armpit of colorado....Pueblo

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Nov 26, 2011 13:26:02   #
wisecrafter Loc: Pocahontas, Arkansas
 
I have a "Hoya special effect filters" user’s instructions pamphlet, and Chapjon is correct, it is a Center Spot. The center spot is a close-up lens of approximately +2 diopters with a hole cut in the center.
As a side note, CS also designates Color-spot. You can tell if it is a Color-Spot because it will have a hole in the center and comes in Red, Green, Yellow, and Gray.

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