P3D Re: Belplasca filter size

[Paul Ivester <pi@xxxxxxxxxxxx>]

Lincoln asked about filter adapter rings for the Belplasca.
The lenses have a 25.5 mm internal thread, but screw-in 
filters will vignette noticeably.  28.5 mm slip-on series V 
adapter rings will fit the lenses, but they too will cause 
vingnetting, but not as bad as the screw-ins.  I use these 
occasionally with shades, since a little vignetting is better 
than a lot of lens flare if the lighting is really a problem.  
I use large shades, so the vignetting is definitely from the 
adapter rings, not the shades.  It might be possible to 
modify the adapter rings to prevent vignetting.  Has anyone 
found a solution to this problem?

Paul Ivester

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