two filters??

seanlim · 14th November 2005

could two filters be on at e same time?...eg. UV plus CP ??

exhibitj · 14th November 2005

Yes they can. Been using a UV filter acting as a lens protector mainly and the CP for bright landscape shots.

The CP can also act as GND filter to lower the amt of light entering the lens by 2 stops, so that u can use a slower shutter speed without overexposing your shots.

seanlim · 14th November 2005

thanks...so therefore 2 is max??can add uv plus cp plus starlight?...if light is lowered by 2 stops, (i donoe wad it means),would it be underexposed easily?

sORe-EyEz · 15th November 2005

as long as it doesn't vignet, & if all ur filters r low profile de- slim type.

Splutter · 15th November 2005

As far as possible, try not to stack filters as quality will degrade, and at times, there will be vignetting. Unless of course you are talking about using CP and multiple ND grads at the same time, then I guess that's the only way to go about it.

seanlim · 15th November 2005

...thanks

student · 15th November 2005

Originally Posted by exhibitj

Yes they can. Been using a UV filter acting as a lens protector mainly and the CP for bright landscape shots.

The CP can also act as GND filter to lower the amt of light entering the lens by 2 stops, so that u can use a slower shutter speed without overexposing your shots.

You can, but you should not. Especially with a UV and a CP, or a UV and a color filter. Each additional filter and element you introduce increases the risk of image degradation. The light degrades everytime it cross a glass/air interface. Depending on the construction of the lens, the light will also bounce around the insides of the lens.

However there are situations that may warrant stacking up lenses. Example: CP and a ND filter to create a more saturated blue sky and to reduce the contrast between sky and foreground. Another example for B&W photography. Red filter and a CP to make the sky pitch black.

seanlim · 15th November 2005

ooooh...thanks...so whats your default filter?..UV? or CP?

Isaiahfortythirtyone · 15th November 2005

why would you want a CPL as default filter? u lose 2 stops of light = lower shutter speeds. default is usually UV fitler.

zaxh81 · 15th November 2005

Originally Posted by seanlim

ooooh...thanks...so whats your default filter?..UV? or CP?

try lor,CP give you better saturation.

seanlim · 15th November 2005

oooh...

Expiredyoghurt · 15th November 2005

*wonders* ... hmm ... seanlim? .. u know what a CP is right? .. and what a UV filter is .. and what a skylight filter is right? ...

blive · 15th November 2005

Originally Posted by Expiredyoghurt

*wonders* ... hmm ... seanlim? .. u know what a CP is right? .. and what a UV filter is .. and what a skylight filter is right? ...

no need to suan him like that. He could do another post if he wants the answer, or do a search on the forum and other sources...

solarii · 15th November 2005

Originally Posted by seanlim

thanks...so therefore 2 is max??can add uv plus cp plus starlight?...if light is lowered by 2 stops, (i donoe wad it means),would it be underexposed easily?

1 stop is a measure of light. Your image won't "under expose easily". Just that you have to use either a slower shutter speed (possibility of hand-shake) or a wider aperture (loss of DOF).

As the others have said, try not to stack filters. Could have undesirable results. Also if u use cheap filters beware of "ghosting effects" when u shoot at night. Will happen if your scene has bright spots of light. If u're affected just remove the filter before shooting, or buy the more ex. HMC filters.

Expiredyoghurt · 15th November 2005

Originally Posted by blive

no need to suan him like that. He could do another post if he wants the answer, or do a search on the forum and other sources...

err .. not really ment as a suan lah ... really asking .. cos i feel he ought to find an 'old bird' to learn some basics from .. or simply do some home work and read up the basics ... (or simply read "ClubSNAP's Photography 101 for Newbies" found @ http://www.clubsnap.org/display.php?...graphy101.html

Isaiahfortythirtyone · 16th November 2005

i stacked hoya HMC UV + Hoya single coated CPL on my tamron 28-75 whilst shooting sunset in sentosa yesterday. one particular shot had a greenish BLOB on it.

but the rest were ok. not sure if it was cos i stacked fitlers.

oh....i also stacked manually, without step down ring.

to use my 67mm CPL on kit lens, i focused, palced the CPL infront of my kit lens, then turned and held it there. hehe. anyone knows if this method is ok?

solarii · 17th November 2005

Yup the greenish blob's probably caused by the filters. Heard that its because light reflects off the surface of the sensor, but instead of passing out of the lens it reflects off the filter and back onto the sensor to be captured. Sort of an internal relfection.

Thats why you don't see such reflections through your viewfinder when framing. Happens when you shot covers very bright spots of lights in a relatively dark background, ie sunsets, night scenes in the city.

14th November 2005	#1
seanlim Member Join Date: Oct 2005 Location: NEL Posts: 897	two filters?? could two filters be on at e same time?...eg. UV plus CP ??

14th November 2005	#2
exhibitj Member Join Date: Sep 2005 Location: Singapore NE Posts: 407	Re: two filters?? Yes they can. Been using a UV filter acting as a lens protector mainly and the CP for bright landscape shots. The CP can also act as GND filter to lower the amt of light entering the lens by 2 stops, so that u can use a slower shutter speed without overexposing your shots.

14th November 2005	#3
seanlim Member Join Date: Oct 2005 Location: NEL Posts: 897	Re: two filters?? thanks...so therefore 2 is max??can add uv plus cp plus starlight?...if light is lowered by 2 stops, (i donoe wad it means),would it be underexposed easily?

15th November 2005	#4
sORe-EyEz Senior Member Join Date: Jun 2005 Location: SGee Posts: 1,568	Re: two filters?? as long as it doesn't vignet, & if all ur filters r low profile de- slim type.

15th November 2005	#5
Splutter Senior Member Join Date: Dec 2003 Location: Gim Boon Tai Posts: 2,819	Re: two filters?? As far as possible, try not to stack filters as quality will degrade, and at times, there will be vignetting. Unless of course you are talking about using CP and multiple ND grads at the same time, then I guess that's the only way to go about it. __________________ If you understand my works, it's photography. If you don't, it's art. SplutterPhotography\|flickr

15th November 2005	#6
seanlim Member Join Date: Oct 2005 Location: NEL Posts: 897	Re: two filters?? ...thanks

15th November 2005	#8
seanlim Member Join Date: Oct 2005 Location: NEL Posts: 897	Re: two filters?? ooooh...thanks...so whats your default filter?..UV? or CP?

15th November 2005	#9
Isaiahfortythirtyone Senior Member Join Date: Jul 2005 Location: Clementi Posts: 2,470	Re: two filters?? why would you want a CPL as default filter? u lose 2 stops of light = lower shutter speeds. default is usually UV fitler.

15th November 2005	#11
seanlim Member Join Date: Oct 2005 Location: NEL Posts: 897	Re: two filters?? oooh...

15th November 2005	#12
Expiredyoghurt Member Join Date: Dec 2004 Location: Yishun Posts: 1,385	Re: two filters?? wonders ... hmm ... seanlim? .. u know what a CP is right? .. and what a UV filter is .. and what a skylight filter is right? ...

16th November 2005	#16
Isaiahfortythirtyone Senior Member Join Date: Jul 2005 Location: Clementi Posts: 2,470	Re: two filters?? i stacked hoya HMC UV + Hoya single coated CPL on my tamron 28-75 whilst shooting sunset in sentosa yesterday. one particular shot had a greenish BLOB on it. but the rest were ok. not sure if it was cos i stacked fitlers. oh....i also stacked manually, without step down ring. to use my 67mm CPL on kit lens, i focused, palced the CPL infront of my kit lens, then turned and held it there. hehe. anyone knows if this method is ok?

17th November 2005	#17
solarii Member Join Date: Oct 2005 Location: Bt. Timah Posts: 1,375	Re: two filters?? Yup the greenish blob's probably caused by the filters. Heard that its because light reflects off the surface of the sensor, but instead of passing out of the lens it reflects off the filter and back onto the sensor to be captured. Sort of an internal relfection. Thats why you don't see such reflections through your viewfinder when framing. Happens when you shot covers very bright spots of lights in a relatively dark background, ie sunsets, night scenes in the city.