Comments on Filters
Dan Baum (email@example.com) wrote:
: |> I'm afraid you've been mislead. The paperwork in the B+W filter box states
: |> quite clearly that their filters are not coated! Coating must be ordered as
: |> an option. I certainly feel ripped off after I paid nearly $150 for a
: |> polarizer that is not even single coatad.
: Interesting, I just picked up a couple of B+W filters yesterday, and they
: clearly state "Coated" on the box. My understanding was that the standard
: coating was the "double hard coating on both sides" to which Bob was refering.
: The literature supplied with each filter does state that Multicoating is available
: as an option on some filters.
Hard coating is not multicoating, nor is it a fluoride or metal coat - it
is protective, not intended for the improvement of transmission
characteristics. Yes, I'd buy that B+W hardcoat their filters, sure.
But multicoating is available only on select filters, only at extremely
high additional cost, and is NEVER standard on ANY B+W filter. As such,
given their base price, one would do much better to pay half the money
and get TMC (Tiffen MC), or the same amount and get a BETTER quality
BETTER multicoated Pentax SMC or Nikon NIC or Canon SC or Minolta MMC
filter. Pentax's Circular Polarizers SMC come from 49mm to 77mm and are
to die for - I leave one on my 645 WA lens all the time. Heliopan are
good but not as good as the reputation that precedes them - they make a
"warm" polarizer that is indeed the favourite of may pros, but my
experience with them left me cold (they desaturate blues and greens
they're so warm) - so back to Pentax and Nikon for me.
Best cost/performance: Tiffen TMC
Most excessive undeserved reputation: B+W and Heliopan
Best performance in every regard: Pentax SMC
Acceptable MC filters for pro use: Nikon, Canon, Minolta
Best spectral transmittance (200-760nm): Kodak Wratten
Best CR39: They're all ~same in quality
Best custom resins: Singh-Ray
Best didymium ("enhancer"): TSI K12 Didymium
Best interference filters: Omega Tristimulus XB series
Don't use no-names. Don't use un-multicoated UV or 1A or L37 or L39 type
filters as lens protectors - it's WA flare suicide, and telephoto fuzzifying.
Glass circles should always be multicoated, glass squares depends on
material, resin can't be coated.
Hope that clears up a bit.