circular polorizer filter

jimbay

I just bought a Sigma 52 mm circular polarizer filter for my D50 kit lens,
the 18-55 mm one. I understand the operation of it and using it outside near
the ocean but does it make a difference indoors? I mounted it between my
lens and a UV filter that I use mainly for protection. But it seems that
sometimes the pictures are a bit different. I've tried to take pictures with
it mounted and off but it's sometimes hard to see a difference and I was
wondering if it's just my imagination. I would like to just leave it mounted
all the time if it doesn't change anything indoors or under low light
conditions.

Thank you for any advice!

T Shadow

"jimbay" <jimbay@yahoo.com> wrote in message
news:13tnqmft7esaned@corp.supernews.com...
> I just bought a Sigma 52 mm circular polarizer filter for my D50 kit lens,
> the 18-55 mm one. I understand the operation of it and using it outside
near
> the ocean but does it make a difference indoors? I mounted it between my
> lens and a UV filter that I use mainly for protection. But it seems that
> sometimes the pictures are a bit different. I've tried to take pictures
with
> it mounted and off but it's sometimes hard to see a difference and I was
> wondering if it's just my imagination. I would like to just leave it
mounted
> all the time if it doesn't change anything indoors or under low light
> conditions.
>
> Thank you for any advice!
>
>

http://en.wikipedia.org/wiki/Filter_...y%29#Polarizer

I learned a little from it about digital cameras but they don't mention that
light reflected from metal is already polarized so the filter has no effect
so it isn't complete. The filter only has an effect when the light is
unpolarized and you place it at an angle that the light is polarized by the
filter.

What happens depends on the light the camera is receiving. Even out in
sunlight the filter only has effect at certain angles to the sun. Might be
helpful to rotate the filter off the camera to see where the best effect is
then put it on the camera in the same orientation if a desired effect is
found. IOW if the light is already polarized the filter is just an expensive
Neutral Density filter.

Experience is probably the best teacher but you may find better info than
the Wikipedia link by Goolging.

jimbay

"T Shadow" <blackhole@nowhere.void.com> wrote in message
news:47dc10bb$0$12589$4c368faf@roadrunner.com...
> "jimbay" <jimbay@yahoo.com> wrote in message
> news:13tnqmft7esaned@corp.supernews.com...
>> I just bought a Sigma 52 mm circular polarizer filter for my D50 kit
>> lens,
>> the 18-55 mm one. I understand the operation of it and using it outside
> near
>> the ocean but does it make a difference indoors? I mounted it between my
>> lens and a UV filter that I use mainly for protection. But it seems that
>> sometimes the pictures are a bit different. I've tried to take pictures
> with
>> it mounted and off but it's sometimes hard to see a difference and I was
>> wondering if it's just my imagination. I would like to just leave it
> mounted
>> all the time if it doesn't change anything indoors or under low light
>> conditions.
>>
>> Thank you for any advice!
>>
>>
>
> http://en.wikipedia.org/wiki/Filter_...y%29#Polarizer
>
> I learned a little from it about digital cameras but they don't mention
> that
> light reflected from metal is already polarized so the filter has no
> effect
> so it isn't complete. The filter only has an effect when the light is
> unpolarized and you place it at an angle that the light is polarized by
> the
> filter.
>
> What happens depends on the light the camera is receiving. Even out in
> sunlight the filter only has effect at certain angles to the sun. Might be
> helpful to rotate the filter off the camera to see where the best effect
> is
> then put it on the camera in the same orientation if a desired effect is
> found. IOW if the light is already polarized the filter is just an
> expensive
> Neutral Density filter.
>
> Experience is probably the best teacher but you may find better info than
> the Wikipedia link by Goolging.
>


Thanks for the link, I didn't even think of Wiki. The filter is like two in
one. One side screws to the camera lens and the front of it can freely
rotate 360 degrees. The front is also threaded to put another filter on. I
just didn't want to be having to take it off all the time because knowing me
I'd likely drop it. But your right, experience is usually the best teacher.

Thanks!

thoss

At 14:06:40 on Sat, 15 Mar 2008 T Shadow opined:-

>"jimbay" <jimbay@yahoo.com> wrote in message
>news:13tnqmft7esaned@corp.supernews.com...
>> I just bought a Sigma 52 mm circular polarizer filter for my D50 kit lens,
>> the 18-55 mm one. I understand the operation of it and using it outside
>near
>> the ocean but does it make a difference indoors? I mounted it between my
>> lens and a UV filter that I use mainly for protection. But it seems that
>> sometimes the pictures are a bit different. I've tried to take pictures
>with
>> it mounted and off but it's sometimes hard to see a difference and I was
>> wondering if it's just my imagination. I would like to just leave it
>mounted
>> all the time if it doesn't change anything indoors or under low light
>> conditions.
>>
>> Thank you for any advice!
>>
>>
>
>http://en.wikipedia.org/wiki/Filter_...y%29#Polarizer
>
>I learned a little from it

Not enough, it seems.

>about digital cameras but they don't mention that
>light reflected from metal is already polarized so the filter has no effect
>so it isn't complete. The filter only has an effect when the light is
>unpolarized and you place it at an angle that the light is polarized by the
>filter.
>
>What happens depends on the light the camera is receiving. Even out in
>sunlight the filter only has effect at certain angles to the sun. Might be
>helpful to rotate the filter off the camera to see where the best effect is
>then put it on the camera in the same orientation if a desired effect is
>found. IOW if the light is already polarized the filter is just an expensive
>Neutral Density filter.
>
>Experience is probably the best teacher but you may find better info than
>the Wikipedia link by Goolging.
>
No, that is wrong: the effect of a polarising filter is exactly
opposite to what you have described. Light reflected from water or
metal is (partially) plane-polarised and therefore the amount getting
through the filter IS affected by its orientation. The amount of un-
polarised light is not affected.

Polarisers are commonly used in photography to reduce reflections from
metal or water surfaces. The effect you get will vary as you rotate the
filter in its own plane. It will of course do this indoors as well as
out.
--
Thoss

T Shadow

"thoss" <usenet@amolad.org.uk> wrote in message
news:co5dMmBE4B3HFwOU@thoss.plus.com...
> At 14:06:40 on Sat, 15 Mar 2008 T Shadow opined:-
>
> >"jimbay" <jimbay@yahoo.com> wrote in message
> >news:13tnqmft7esaned@corp.supernews.com...
> >> I just bought a Sigma 52 mm circular polarizer filter for my D50 kit
lens,
> >> the 18-55 mm one. I understand the operation of it and using it outside
> >near
> >> the ocean but does it make a difference indoors? I mounted it between
my
> >> lens and a UV filter that I use mainly for protection. But it seems
that
> >> sometimes the pictures are a bit different. I've tried to take pictures
> >with
> >> it mounted and off but it's sometimes hard to see a difference and I
was
> >> wondering if it's just my imagination. I would like to just leave it
> >mounted
> >> all the time if it doesn't change anything indoors or under low light
> >> conditions.
> >>
> >> Thank you for any advice!
> >>
> >>
> >
> >http://en.wikipedia.org/wiki/Filter_...y%29#Polarizer
> >
> >I learned a little from it
>
> Not enough, it seems.
>
> >about digital cameras but they don't mention that
> >light reflected from metal is already polarized so the filter has no
effect
> >so it isn't complete. The filter only has an effect when the light is
> >unpolarized and you place it at an angle that the light is polarized by
the
> >filter.
> >
> >What happens depends on the light the camera is receiving. Even out in
> >sunlight the filter only has effect at certain angles to the sun. Might
be
> >helpful to rotate the filter off the camera to see where the best effect
is
> >then put it on the camera in the same orientation if a desired effect is
> >found. IOW if the light is already polarized the filter is just an
expensive
> >Neutral Density filter.
> >
> >Experience is probably the best teacher but you may find better info than
> >the Wikipedia link by Goolging.
> >
> No, that is wrong: the effect of a polarising filter is exactly
> opposite to what you have described. Light reflected from water or
> metal is (partially) plane-polarised and therefore the amount getting
> through the filter IS affected by its orientation. The amount of un-
> polarised light is not affected.
>
> Polarisers are commonly used in photography to reduce reflections from
> metal or water surfaces. The effect you get will vary as you rotate the
> filter in its own plane. It will of course do this indoors as well as
> out.
> --
> Thoss

I believe you because???

thoss

At 15:59:15 on Sat, 15 Mar 2008 T Shadow opined:-

>"thoss" <usenet@amolad.org.uk> wrote in message
>news:co5dMmBE4B3HFwOU@thoss.plus.com...
>> At 14:06:40 on Sat, 15 Mar 2008 T Shadow opined:-
>>
>> >"jimbay" <jimbay@yahoo.com> wrote in message
>> >news:13tnqmft7esaned@corp.supernews.com...
>> >> I just bought a Sigma 52 mm circular polarizer filter for my D50 kit
>lens,
>> >> the 18-55 mm one. I understand the operation of it and using it outside
>> >near
>> >> the ocean but does it make a difference indoors? I mounted it between
>my
>> >> lens and a UV filter that I use mainly for protection. But it seems
>that
>> >> sometimes the pictures are a bit different. I've tried to take pictures
>> >with
>> >> it mounted and off but it's sometimes hard to see a difference and I
>was
>> >> wondering if it's just my imagination. I would like to just leave it
>> >mounted
>> >> all the time if it doesn't change anything indoors or under low light
>> >> conditions.
>> >>
>> >> Thank you for any advice!
>> >>
>> >>
>> >
>> >http://en.wikipedia.org/wiki/Filter_...y%29#Polarizer
>> >
>> >I learned a little from it
>>
>> Not enough, it seems.
>>
>> >about digital cameras but they don't mention that
>> >light reflected from metal is already polarized so the filter has no
>effect
>> >so it isn't complete. The filter only has an effect when the light is
>> >unpolarized and you place it at an angle that the light is polarized by
>the
>> >filter.
>> >
>> >What happens depends on the light the camera is receiving. Even out in
>> >sunlight the filter only has effect at certain angles to the sun. Might
>be
>> >helpful to rotate the filter off the camera to see where the best effect
>is
>> >then put it on the camera in the same orientation if a desired effect is
>> >found. IOW if the light is already polarized the filter is just an
>expensive
>> >Neutral Density filter.
>> >
>> >Experience is probably the best teacher but you may find better info than
>> >the Wikipedia link by Goolging.
>> >
>> No, that is wrong: the effect of a polarising filter is exactly
>> opposite to what you have described. Light reflected from water or
>> metal is (partially) plane-polarised and therefore the amount getting
>> through the filter IS affected by its orientation. The amount of un-
>> polarised light is not affected.
>>
>> Polarisers are commonly used in photography to reduce reflections from
>> metal or water surfaces. The effect you get will vary as you rotate the
>> filter in its own plane. It will of course do this indoors as well as
>> out.
>> --
>> Thoss
>
>I believe you because???
>
Because after you have followed your own advice and been taught by
experience you will find that it is so.


--
Thoss

T Shadow

"thoss" <usenet@amolad.org.uk> wrote in message
news:kZWNX2At9S3HFwbB@thoss.plus.com...
> At 15:59:15 on Sat, 15 Mar 2008 T Shadow opined:-
>
> >"thoss" <usenet@amolad.org.uk> wrote in message
> >news:co5dMmBE4B3HFwOU@thoss.plus.com...
> >> At 14:06:40 on Sat, 15 Mar 2008 T Shadow opined:-
> >>
> >> >"jimbay" <jimbay@yahoo.com> wrote in message
> >> >news:13tnqmft7esaned@corp.supernews.com...
> >> >> I just bought a Sigma 52 mm circular polarizer filter for my D50 kit
> >lens,
> >> >> the 18-55 mm one. I understand the operation of it and using it
outside
> >> >near
> >> >> the ocean but does it make a difference indoors? I mounted it
between
> >my
> >> >> lens and a UV filter that I use mainly for protection. But it seems
> >that
> >> >> sometimes the pictures are a bit different. I've tried to take
pictures
> >> >with
> >> >> it mounted and off but it's sometimes hard to see a difference and I
> >was
> >> >> wondering if it's just my imagination. I would like to just leave it
> >> >mounted
> >> >> all the time if it doesn't change anything indoors or under low
light
> >> >> conditions.
> >> >>
> >> >> Thank you for any advice!
> >> >>
> >> >>
> >> >
> >> >http://en.wikipedia.org/wiki/Filter_...y%29#Polarizer
> >> >
> >> >I learned a little from it
> >>
> >> Not enough, it seems.
> >>
> >> >about digital cameras but they don't mention that
> >> >light reflected from metal is already polarized so the filter has no
> >effect
> >> >so it isn't complete. The filter only has an effect when the light is
> >> >unpolarized and you place it at an angle that the light is polarized
by
> >the
> >> >filter.
> >> >
> >> >What happens depends on the light the camera is receiving. Even out in
> >> >sunlight the filter only has effect at certain angles to the sun.
Might
> >be
> >> >helpful to rotate the filter off the camera to see where the best
effect
> >is
> >> >then put it on the camera in the same orientation if a desired effect
is
> >> >found. IOW if the light is already polarized the filter is just an
> >expensive
> >> >Neutral Density filter.
> >> >
> >> >Experience is probably the best teacher but you may find better info
than
> >> >the Wikipedia link by Goolging.
> >> >
> >> No, that is wrong: the effect of a polarising filter is exactly
> >> opposite to what you have described. Light reflected from water or
> >> metal is (partially) plane-polarised and therefore the amount getting
> >> through the filter IS affected by its orientation. The amount of un-
> >> polarised light is not affected.
> >>
> >> Polarisers are commonly used in photography to reduce reflections from
> >> metal or water surfaces. The effect you get will vary as you rotate
the
> >> filter in its own plane. It will of course do this indoors as well as
> >> out.
> >> --
> >> Thoss
> >
> >I believe you because???
> >
> Because after you have followed your own advice and been taught by
> experience you will find that it is so.
>
>
Wrong

John-Roy Photography

The polorizer should be placed on the out side of the lens. (last filter)
It is an outside filter or one that you use to tone down hot spots.

John O. Roy
Photographer


http://www.john-roy.com


http://cozmicphotography.exposuremanager.com/

http://johnroyphoto.wordpress.com/ (my photo blog)


"jimbay" <jimbay@yahoo.com> wrote in message
news:13tnqmft7esaned@corp.supernews.com...
>I just bought a Sigma 52 mm circular polarizer filter for my D50 kit lens,
>the 18-55 mm one. I understand the operation of it and using it outside
>near the ocean but does it make a difference indoors? I mounted it between
>my lens and a UV filter that I use mainly for protection. But it seems that
>sometimes the pictures are a bit different. I've tried to take pictures
>with it mounted and off but it's sometimes hard to see a difference and I
>was wondering if it's just my imagination. I would like to just leave it
>mounted all the time if it doesn't change anything indoors or under low
>light conditions.
>
> Thank you for any advice!
>