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  #1  
Old 06-16-2008, 02:51 AM
rfdjr1@optonline.net
 
Posts: n/a
Default Lens filters

While I'm on a roll with questions here, how about filters? I have a UV filter
on one of my lenses and a Skylight filter on the other. I consider them for
protecting the lens which is something I was told to do years ago. How does
either affect color and is one better tha the other for just leaving on the
lens? Thanks for all the replies so far.

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  #2  
Old 06-16-2008, 05:59 AM
Junior Member
 
Join Date: Dec 2007
Posts: 193
Ray1979 is on a distinguished road
Default Re: Lens filters


<rfdjr1@optonline.net> wrote in message
news:2lhb54phrm2mgao3sf9f3l8t3ehfd9rg73@4ax.com...
> While I'm on a roll with questions here, how about filters? I have a UV
> filter
> on one of my lenses and a Skylight filter on the other. I consider them
> for
> protecting the lens which is something I was told to do years ago. How
> does
> either affect color and is one better tha the other for just leaving on
> the
> lens? Thanks for all the replies so far.
>


After using filters for 30 years on film cameras I had a think and realised
that I had never actually damged a lens and since getting my first D-SLR 3
1/2 years ago I have only used CP and ND filters.

Auto White Balance will look after the colour anyway so perhaps if you are a
klutz orstil paranoid then get the highest quality clear "filter" you can to
protect your pride and joy.


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  #3  
Old 06-16-2008, 08:49 AM
Neil Ellwood
 
Posts: n/a
Default Re: Lens filters

On Mon, 16 Jun 2008 14:59:43 +1000, Pete D wrote:

> <rfdjr1@optonline.net> wrote in message
> news:2lhb54phrm2mgao3sf9f3l8t3ehfd9rg73@4ax.com...
>> While I'm on a roll with questions here, how about filters? I have a UV
>> filter
>> on one of my lenses and a Skylight filter on the other. I consider them
>> for
>> protecting the lens which is something I was told to do years ago. How
>> does
>> either affect color and is one better tha the other for just leaving on
>> the
>> lens? Thanks for all the replies so far.
>>
>>

> After using filters for 30 years on film cameras I had a think and
> realised that I had never actually damged a lens and since getting my
> first D-SLR 3 1/2 years ago I have only used CP and ND filters.
>
> Auto White Balance will look after the colour anyway so perhaps if you
> are a klutz orstil paranoid then get the highest quality clear "filter"
> you can to protect your pride and joy.


In 55 years of taking photographs I have NEVER damaged a lens or filter,
because of this the only filters that I now possess are polarisers for
each of the lenses that I have.

If you treat your cameras and lenses with care damage is unlikely.
Remember that cameras and lenses are delicate instruments. Years ago
there was a fashion for carrying cameras in the erc. with the strap in
the hand leaving the camera almost touching the ankle - it used to make
me shudder whenever I saw someone doing it.

--
Neil
reverse ra and delete l
Linux user 335851
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  #4  
Old 06-16-2008, 01:26 PM
Joseph Meehan
 
Posts: n/a
Default Re: Lens filters

<rfdjr1@optonline.net> wrote in message
news:2lhb54phrm2mgao3sf9f3l8t3ehfd9rg73@4ax.com...
> While I'm on a roll with questions here, how about filters? I have a UV
> filter
> on one of my lenses and a Skylight filter on the other. I consider them
> for
> protecting the lens which is something I was told to do years ago. How
> does
> either affect color and is one better tha the other for just leaving on
> the
> lens? Thanks for all the replies so far.
>


Both filter UV light, just different amounts of it. It appears that
most (all?) current digital cameras are UV blind, so the filters will not
make any filtering difference. However like anything that you put in front
of the lens they will change the image. Assuming they are good quality and
are coated, they likely will do little noticeable change to your images.
They may cause you some problems with flare.

In real life, with reasonable care the chance of damage to a lens is
slight. Even that is reduced if you use a lens shade, which does not have
any of the drawbacks of a filter. In real life that small scratch or chip
will not cause noticeable change in the results. (BTW it is a good idea to
blacken that chip or scratch with some black ink (fine felt tip marker or
India ink. ) Many years ago when working as a professional, I did scratch a
lens or two and that tick worked fine. There was zero image problem.

The one time I do suggest a "protective" filter is when working in a
windy dusty - sandy area where the lens may be subject to wind blown sand or
dust. Otherwise if it makes you fell good do it. If you don't see a
problem there is no problem for you.


--
Joseph Meehan

Dia 's Muire duit



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  #5  
Old 06-16-2008, 03:38 PM
Don Stauffer in Minnesota
 
Posts: n/a
Default Re: Lens filters

On Jun 15, 8:51 pm, rfd...@optonline.net wrote:
> While I'm on a roll with questions here, how about filters? I have a UV filter
> on one of my lenses and a Skylight filter on the other. I consider them for
> protecting the lens which is something I was told to do years ago. How does
> either affect color and is one better tha the other for just leaving on the
> lens? Thanks for all the replies so far.


The effects on color between those two are pretty close. Further, the
change in color is less on the typical digital camera than on film,
because digitals are less sensitive to UV than are film cameras
(actually, the film is the sensitive element, but you know what I
mean :-) ).

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  #6  
Old 06-16-2008, 06:23 PM
Mark Roberts
 
Posts: n/a
Default Re: Lens filters

Don Stauffer in Minnesota wrote:

>On Jun 15, 8:51 pm, rfd...@optonline.net wrote:
>> While I'm on a roll with questions here, how about filters? I have a UV filter
>> on one of my lenses and a Skylight filter on the other. I consider them for
>> protecting the lens which is something I was told to do years ago. How does
>> either affect color and is one better tha the other for just leaving on the
>> lens? Thanks for all the replies so far.

>
>The effects on color between those two are pretty close. Further, the
>change in color is less on the typical digital camera than on film,
>because digitals are less sensitive to UV than are film cameras
>(actually, the film is the sensitive element, but you know what I
>mean :-) ).


Here's a graph showing fairly typical transmission curves for UV and
Skylight filters (and a few other types):
http://www.robertstech.com/graphics/images/filters2.gif
(The "Cloudy" filter shown in this graph is very similar to a Wratten
#81b)

--
Mark Roberts Photography & Multimedia
www.robertstech.com




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  #7  
Old 06-16-2008, 06:50 PM
Jake
 
Posts: n/a
Default Re: Lens filters

Some people use protecting filters, some don't.

I don't use protection filters myself. Although, I do use a B+W UV filter
on my 50 1.2 prime, because it seals the front and adds dust/dirt protection
(on this lens the front lens elements extend/retract inside the lens
barrel).

It really is a personal thing. Generally, I think that a lens hood gives
better protection (as I found a long time ago when I didn't strap my camera
properly and it fell off my shoulder). Shattered the lens hood and
dislodged the mirror, but no damage to the lens. Of course, if you are
shooting in sandy/salty conditions, etc. I would use a protection filter.



<rfdjr1@optonline.net> wrote in message
news:2lhb54phrm2mgao3sf9f3l8t3ehfd9rg73@4ax.com...
> While I'm on a roll with questions here, how about filters? I have a UV
> filter
> on one of my lenses and a Skylight filter on the other. I consider them
> for
> protecting the lens which is something I was told to do years ago. How
> does
> either affect color and is one better tha the other for just leaving on
> the
> lens? Thanks for all the replies so far.
>


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  #8  
Old 06-16-2008, 07:54 PM
ben brugman
 
Posts: n/a
Default Re: Lens filters


<rfdjr1@optonline.net> schreef in bericht
news:2lhb54phrm2mgao3sf9f3l8t3ehfd9rg73@4ax.com...
> While I'm on a roll with questions here, how about filters? I have a UV
> filter
> on one of my lenses and a Skylight filter on the other. I consider them
> for
> protecting the lens which is something I was told to do years ago. How
> does
> either affect color and is one better tha the other for just leaving on
> the
> lens? Thanks for all the replies so far.
>


For pictures it's better to take the filters off.
For protection, you could leave the filters on.

Protection ON
It's good to know when to take them off and when to leave them on.
Near water (especially salt water) and near sand it's better to leave the
filters on.
So in a boat or on the beach leave the filters on. Any situation where your
lens
can get contaminated you should leave the filters on. (Water, soap, dirt,
grit, sand).
(Dust is in general no problem for the lens).


Filter OFF.
In night scenes, often with strong lights in the scene leave the off. Or you
will
get reflections (point symetric) in the picture.

In strong contrast scenes leave the filters off, because it reduces the
contrast
sometimes, but not predictable. (So it can't be used to reduce the contrast
when
you actually want to reduce the contrast).

When the sun (or any other strong light shines on the filter) leave it of.
When using
not using the shade this can be quite often. When making pictures of the
sunset,
the sun is shining on the filter so you should leave it of then.

For the best quality leave the filter off. Theoretically for every picture
the filter will
reduce the contrast, allthough in most cases you won't notice and probably
can not even
be measured.

NEUTRAL
If the scene does not contain high contrast situations, the difference
between
leaving the filter on or off is very limited.

Ben Brugman

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  #9  
Old 06-16-2008, 07:56 PM
Mark Roberts
 
Posts: n/a
Default Re: Lens filters

Mark Roberts wrote:

>Don Stauffer in Minnesota wrote:
>
>>On Jun 15, 8:51 pm, rfd...@optonline.net wrote:
>>> While I'm on a roll with questions here, how about filters? I have a UV filter
>>> on one of my lenses and a Skylight filter on the other. I consider them for
>>> protecting the lens which is something I was told to do years ago. How does
>>> either affect color and is one better tha the other for just leaving on the
>>> lens? Thanks for all the replies so far.

>>
>>The effects on color between those two are pretty close. Further, the
>>change in color is less on the typical digital camera than on film,
>>because digitals are less sensitive to UV than are film cameras
>>(actually, the film is the sensitive element, but you know what I
>>mean :-) ).

>
>Here's a graph showing fairly typical transmission curves for UV and
>Skylight filters (and a few other types):
>http://www.robertstech.com/graphics/images/filters2.gif
>(The "Cloudy" filter shown in this graph is very similar to a Wratten
>#81b)


Correction: Make that an 81a filter



--
Mark Roberts Photography & Multimedia
www.robertstech.com




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  #10  
Old 06-17-2008, 05:49 AM
Nick Amoroso
 
Posts: n/a
Default Re: Lens filters

"Neil Ellwood" <cral.elllwood2@bt.openworld.com> wrote in message
news:fOGdnfUMWK6GhsvVnZ2dnUVZ8sXinZ2d@bt.com...
> On Mon, 16 Jun 2008 14:59:43 +1000, Pete D wrote:
>
>> <rfdjr1@optonline.net> wrote in message
>> news:2lhb54phrm2mgao3sf9f3l8t3ehfd9rg73@4ax.com...
>>> While I'm on a roll with questions here, how about filters? I have a UV
>>> filter
>>> on one of my lenses and a Skylight filter on the other. I consider them
>>> for
>>> protecting the lens which is something I was told to do years ago. How
>>> does
>>> either affect color and is one better tha the other for just leaving on
>>> the
>>> lens? Thanks for all the replies so far.
>>>
>>>

>> After using filters for 30 years on film cameras I had a think and
>> realised that I had never actually damged a lens and since getting my
>> first D-SLR 3 1/2 years ago I have only used CP and ND filters.
>>
>> Auto White Balance will look after the colour anyway so perhaps if you
>> are a klutz orstil paranoid then get the highest quality clear "filter"
>> you can to protect your pride and joy.

>
> In 55 years of taking photographs I have NEVER damaged a lens or filter,
> because of this the only filters that I now possess are polarisers for
> each of the lenses that I have.
>
> If you treat your cameras and lenses with care damage is unlikely.
> Remember that cameras and lenses are delicate instruments. Years ago
> there was a fashion for carrying cameras in the erc. with the strap in
> the hand leaving the camera almost touching the ankle - it used to make
> me shudder whenever I saw someone doing it.
>
> --
> Neil
> reverse ra and delete l
> Linux user 335851


i treat my gear with care, but i'm a still a complete klutz. for that
reason, i've got b&w uv filters on all of my lenses. no other reason,
really; i've never seen much in the way of visual difference.

nick

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