If a filter is coated, it's coated on both sides. Not much point, otherwise.
Yer right, plastic filters are not coated. Using uncoated filters on
premiere quality glass is like putting cheap tires on a Lamborghini - just
my opinion.
Regards,
Bob...
On 11 Feb 2003 at 22:00, Alan Chan wrote:
IMHO, if you use 1 filter only and use a deep hood, it doesn't make any
practical difference. At least none of PLs is coated and I haven't seen any lost
of sharpness.
A hood can't exclude reflections generated by light sources within the angle of
Message text written by INTERNET:[EMAIL PROTECTED]
IMHO, if you use 1 filter only and use a deep hood, it doesn't make any
practical difference. At least none of PLs is coated and I haven't seen any
lost of sharpness.
regards,
Alan Chan
one of my circular polarizers is multicoated and one
Ive got to comment here. After reading Bobs post, I
went outside (Wednesday, February 12, 2003) with my
camera and Gossen Luna Pro light meter, # 4D51102.
I shot a few scenes to check both instruments, then
shot them in tandem against a solid tan/light
brown/stucco exterior for my own
Putting an uncoated or single-coated filter on an SMC lens is like putting
all-season tires on a Ferrari.
Or, to put it another way, putting any filter in front of the lens will
cause _some_ image degradation (loss of contrast or sharpness). An SMC
filter will cause the least degradation. In
Any filter that has some color tint to it does not pass all the light
entering it. The color tint is due to absorption of some color light.
Your light meter does not measure the difference because it is not
sensitive enough for these small differences. If you had a color temp.
meter it
Or, to put it another way, putting any filter in front of the lens will
cause _some_ image degradation (loss of contrast or sharpness).
...Allegedly. However, Ctein's Law applies: If you can't see it, it
doesn't count.
--Mike
[EMAIL PROTECTED]
Vastaanottaja: [EMAIL PROTECTED]
[EMAIL PROTECTED]
Päivä: 12. helmikuuta 2003 18:10
Aihe: Re: Coating on Filters?
snip
some skylight filters stop UV and some
pink/red rays.
snip
Yep!
=
Matt Greene
I get it done with YAHOO! DSL!
On 12 Feb 2003 at 9:09, Matt Greene wrote:
Pure (Clear) optical grade glass has no color and is
Gamma neutral.
And will if not coated reflect approximately 5% of the light hitting it's
surface, a single coated piece of glass will reduce this reflection to 1-2%,
SMC will reduce it to a mere
I seldom check a lens's rear element for cleanliness. One of my recurring
fears is that in the year 2030, I'll discover that on each of my lenses, the
rear element has a big smudge that has been degrading my results for
decades.
Pat White [EMAIL PROTECTED] wrote: Or, to put it another way,
Message text written by INTERNET:[EMAIL PROTECTED]
Ok, regular Tiffen B+W filters are uncoated. Regular HOYA filters are
double-coated, but some of their special effect filters are uncoated,
including CPL PL.
regards,
Alan Chan
i have a Hoya Multicoated Circular polarizer and am thinking of
Alan Chan [EMAIL PROTECTED] wrote:
Ok, regular Tiffen B+W filters are uncoated.
Regular B+W filters are single-coated.
[EMAIL PROTECTED]
Check those rear elements! When I bought my used SMCP 135/1.8, I was
dismayed to find that the rear element had on it what appeared to be
cleaning marks that looked just like circular scratches. No amount of
normal cleaning with commercial lens cleaning fluids removed these
scratches, and I was
How important is it to have a coatings on all your filters? A plain UV
filter might cost $10 while an SMC filter would cost $35. I can't see how
it would matter much on the outer surface, a little bit of light would
just be lost. But on the inner surface?
--
A nice adaptation of conditions
How important is it to have a coatings on all your filters? A plain UV
filter might cost $10 while an SMC filter would cost $35. I can't see how
it would matter much on the outer surface, a little bit of light would
just be lost. But on the inner surface?
Outer surface reflections could
Hoya's multicoated filters are about $20. Maybe a good compromise?
I would always prefer a multicoated filter, but I use the Tiffen 812 all
the time with no apparent ill effects. I do use a hood. Tiffen doesn't
make a multicoated version of the 812.
Gregory L. Hansen wrote:
How important
All air/glass interfaces are an abrupt change in impedance for the
electromagnetic energy impinging on/passing through the interface. A portion
of the light must be reflected at each interface. In fact, the same amount
of light will be reflected at the inner interface as from the outer
interface.
Message text written by INTERNET:[EMAIL PROTECTED]
How important is it to have a coatings on all your filters? A plain UV
filter might cost $10 while an SMC filter would cost $35. I can't see how
it would matter much on the outer surface, a little bit of light would
just be lost. But on the
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