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Re: [OM] Autocollimator tests on filters

Subject: Re: [OM] Autocollimator tests on filters
From: "John A. Prosper" <prosper@xxxxxxxxxxxxxxxxx>
Date: Mon, 6 Mar 2000 15:19:06 -0500 (EST)
On Sun, 5 Mar 2000, george wrote:

|
|Looks like Hoyas are a good bet.

I believe Olympus filters are actually made by Hoya, who I believe
also make filters for other manufacturers.



|Gary Reese wrote:
|> 
|> Ron S. writes:
|> 
|> << I noticed no mention of any B+W glass.  Obviously, pricey but I'm
|> curious how they would stack up? >>
|> 
|> Some months ago I tested the filter sets I use on a regular basis.  I
|> threw out the rejects, but here are my passed ones:
|> 
|> 58mm
|> Hoya G(X1)
|> Hoya Polarizer
|> Tiffen Deep Yellow 15
|> B&W 81A
|> Hoya Y(K2)
|> Hoya R(25A)
|> Hoya O(G)
|> 
|> 55mm
|> Olympus V28(Y2)
|> Cokinlight Circular Polarizer
|> Hoya R(25A)
|> Hoya 81A
|> Vivitar VMC 80A
|> 
|> 49mm
|> Hoya FL-W
|> Kenko ND4
|> Hoya G(X0)
|> Hoya O(G)
|> Hoya HMC R(25A)
|> Hoya G(X1)
|> Tiffin 81B [marginal]
|> Vivitar Polarizer (thin)
|> Olympus L39(UV)
|> Tiffen FL-D
|> Hoya FL-Day
|> Vivitar VMC 80A
|> Vivitar VMC 85B
|> Tamron 82A
|> Vivitar VMC 81A
|> 
|> I distinctly recall throwing away brands and types within brands
|> (example, Vivitar VMC) that marketing would lead us to believe are
|> "premium."  Others who have tested have uncovered a fair share of bum
|> Nikon filters.  I say it isn't the brand as much as it is quality
|> control.
|> 
|> Gary Reese
|> Las Vegas, NV
|> 
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