Will a good UV filter reduce flare and ghosting?


ManWearPants

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Jul 14, 2008
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#1
For some lenses that is prone to flaring. I am wondering if adding a good UV filter will help to reduce flares and ghosting since stray lights will be reduced.

Alternatively will adding a CPL / ND filter helps?

What I am asking is whether there is a substitute to multi-coating of the lens?
 

Octarine

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Pasir Ris
#3
Flare is a reflection at the surface of lens elements. How can adding an external piece of glass have any effect on the optical characteristics of the lens elements?
Blocking stray light is the job of a lens hood. CPL also blocks stray light, right. But that's a different form with different side effects.
 

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SilverPine

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#4
Agreed with Diavonex that you need a lens hood to reduce flares, W/O using any filter will help to cut down the ghosting. :)

.
 

spree86

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#5
For some lenses that is prone to flaring. I am wondering if adding a good UV filter will help to reduce flares and ghosting since stray lights will be reduced.

Alternatively will adding a CPL / ND filter helps?

What I am asking is whether there is a substitute to multi-coating of the lens?
Adding the filter might even worsen the flares, use a lens hood if you need to reduce the flares.
 

Diavonex

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Sep 23, 2008
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#7
What if it is a wide angle lens that only allows for shallow lens hood?
Minimise flare through composition. Place objects within your image such that they partially or completely obstruct any flare-inducing light sources.
 

ManWearPants

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#8
ok so a good filter will not help even though they claim to have anti reflective coatings, multi layered coatings, etc

I will experiment and verify.
 

daredevil123

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lil red dot
#9
ok so a good filter will not help even though they claim to have anti reflective coatings, multi layered coatings, etc

I will experiment and verify.
A good filter will get less flares and ghostings compared to not-so-good filters.

A lens with no filter will beat the same lens with a good filter any day.

Hope this helps.
 

henry soh

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#10
GND and CPL are more for exposures than flare which has a stronger intensity of light.
 

daredevil123

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lil red dot
#11
henry soh said:
GND and CPL are more for exposures than flare which has a stronger intensity of light.
Actually cpl is not really meant to control exposure. It is meant to filter out certain wave directions of light.
 

Octarine

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Pasir Ris
#12
ok so a good filter will not help even though they claim to have anti reflective coatings, multi layered coatings, etc
That only means: the filter will not (or only to a small extend) introduce additional flare. But the flare caused by the lens elements will remain, no matter what filter you put on.
 

henry soh

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#13
Filters, not UV, are used to get the correct exposure.
 

daredevil123

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lil red dot
#15
Filters, not UV, are used to get the correct exposure.
I am sorry. But you are not making any sense. :dunno: :think:


The settings on Aperture, ISO and shutter are the things used to get the correct exposure.
 

henry soh

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#16
GND and CPL also change the colors of the captured image from the real scene due to filtering of the light.
 

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Diavonex

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#17
A graduated neutral density filter, is an optical filter that varies the light transmission. It does not change the colour of the captured image.

It is used to bring an overly-bright part of a scene into the dynamic range of the sensor.
 

daredevil123

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lil red dot
#18
GND and CPL also change the colors of the captured image from the real scene due to filtering of the light.
No it doesn't.

What changes the color may be color casting due to IR (in heavy ND situations), or due to the AWB in the camera.
 

henry soh

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#19
I think it adjusts the brightness of colors from dark to bright towards a smooth tonal range of colors of the scene which can have uneven colors of hightlights, shadows, or flares.
 

spree86

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#20
I think it adjusts the brightness of colors from dark to bright towards a smooth tonal range of colors of the scene which can have uneven colors of hightlights, shadows, or flares.
The don't do anything to the colours, thats why they are called neutral, any colour change is not supposed to be there and is a colour cast. ND filters cut off light and allow for longer exposure and GND balance the brightness of the sky and ground so the sky would not be blown out or so that the ground would not be underexposed.
 

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