> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kotsinadelis,
> Peter (Peter)
> Sent: Wednesday, September 11, 2002 8:45 AM
> To: '[EMAIL PROTECTED]'
> Cc: '[EMAIL PROTECTED]'
> Subject: EOS Protective Filters v. other
>
>
>
>
> [EMAIL PROTECTED] wrote:
>
> I recently purchased a 28-70 F2.8L and a 70-200F2.8L to go on my EOS 3
>
> At the time, the sales guy suggested purchasing protective
> filters for both.
> Not being sure I ended up purchasing a Canon "protect" filter and
> switch it
> depending on which lens I am using.
>
> I accept the need for protection for the front of the lens but do not
> understand the difference between a protect, a skylight and a UV filter
>
> On brands, the sales guy suggested not buying Canon but going for B+W.
> These were more expensive so I was suspicious. Was I right to be?
>
> Mostly I photograph wildlife and use Fuji Velvia and Provia films almost
> exclusively.
>
> Opinions gratefully received.
> ------------------------------------------------------------------
> ----------
> ---------------------
> Rod,
>
> First let me mention that Canon filters are in reality made by Tiffen.
> Adding a filter introduces 2 more glass surfaces and there are issues with
> that. In reality it will reduce (albeit ever so slightly) image quality
> although you will not see it unless you make enlargements beyond 30 x 40
> inches
> (and probably not then either).
> If you are going to use filters use one that is useful other than a plain
> piece of glass. I use filters outdoors and prefer UV. You can
> use skylight
> too but they ARE different. UV filters are specifically designed
> to reduce
> UV at particular levels. Stronger UVs have a slight yellow cast.
> Skylight
> filters only cut out 1/2 the UV when compared with a UV filter
> but they are
> a slight pink because they are specifically designed to warm skin tones in
> shaded areas. B+W are excellent as are Hoya and Tiffen. B+W and Heliopan
> are made in Germany, use brass rings and thicker glass and are
> easier to put
> on a remove from lenses. They are more $$$. The others are made
> in Japan,
> mostly by Hoya (or Marumi), have aluminum rings and thinner glass. I
> personally use Hoya HMC (Hoya Multi-Coated) Pro 1 UVs because they use L41
> glass. What this represents is the wavelength at which point the UV is cut
> out. This is the highest UV cutoff before the glass takes on a
> yellow tint.
> B+W makes a UV415 filter which is basically L41.5 glass and
> slightly yellow.
> It will show a yellowish color cast in photos taken with it at sea level
> since it is specifically designed for use in high altitudes.
> Sorry for the long winded reply but IMHO it is best to use a filter that
> provides some benefit. Standard Hoya are L39 glass (the expensive Nikon UV
> filters are L37), are coated, and probably the best for the $$$.
> If you use
> Velvia and Provia you really have no need to warm them up with a filter so
> my recommendation is to buy a good UV filter.
>
> Peter K
>
>
Hi Peter,
Perfect description!
Cheers/Chip
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