Uncoated glass surface reflects 4% of the light falling on it, single coated surface reflects 1.5% and multicoated - theoretically - 0.2%. Theoretical minimum is hard to get in practice. The above according to Leica expert G�nther Osterloh (in the book Angewandte Leica-Technik). All the best! Raimo K Personal photography homepage at: http://www.uusikaupunki.fi/~raikorho
----- Original Message ----- From: "Frantisek" <[EMAIL PROTECTED]> To: "J. C. O'Connell" <[EMAIL PROTECTED]> Sent: Sunday, August 29, 2004 3:21 PM Subject: Re: Huge price differences for photo equipment (Was" polarizer" before) > JCOC> The difference between single coated and multicoated filters > JCOC> is extremely slight as with only two air-glass interfaces, the > JCOC> single coated filters have only approx 2% loss/reflection which > JCOC> is going to be invisible most of the time. I would avoid the uncoated > JCOC> ones but I am telling you they are very rare. > > I beg to differ. The difference between singlecoated and multicoated filters is > tremendous. Especially with light sources in the frame. Remember, it's > not the reflection of the filter but the bouncing from the front > element of lens into the filter and back. That's why Pentax invented > the Ghostless filter back in 60s. They really work. The planar surface > of the filter focuses light sources like bright bulbs perfectly back > onto the film plane. I have seen many photographs where the difference > between uncoated, singlecoated and MC filter shows very well, in that > order of flare resistance. The uncoated are unusable, because you have > a bright, in-focus secondary image of the lightbulb. Singlecoated > diminish the reflection but it is still visible if there is strong > contrast. MC filters or Ghostless (non-planar) filters diminish the > reflection to the point of almost nothing. That's my experience, and I > shoot mostly available light where contrasts are high. > > Good light! > fra >
