VLVL Round wire rims with ND-I filters for lenses

[Mark Wright AIA]

Howdy

--- jbor <jbor at bigpond.com> wrote:
> Does the "1" mean that the filter transmits only 1% of
> incident
> light? -- in which case Frenesi's not seeing very much at all. I
> think it's
> still pertinent that the filter-lenses Frenesi is wearing
> (pretentiously, I
> agree) as sunnies would alter the light, as described in the first
> paragraph, and I think it's pretty clear that the narration engages
> Frenesi's point of view in this scene:

Apparently different manufacturers can use different systems of
numbering the filters, so it might be important which manufacturer's
filters she was wearing. But an ND-2 filter is worth one f-stop
(reducing light to 1/2), an ND-4 filter worth two f-stops (reducing
light to 1/4). So perhaps her ND-1's are worth half an f-stop, which
would be cutting the light intensity to 3/4 of the actual value, which
isn't much really, making them ineffective as sunglasses per se. 

Are there any opthalmologists in the room? Any real photographers?
Speak!

Mark

__________________________________
Do you Yahoo!?
Yahoo! Finance: Get your refund fast by filing online.
http://taxes.yahoo.com/filing.html