From: bill@wsuaix.csc.wsu.edu (William E. Johns;S23015)
Subject: Re: Hi-Def shields
Organization: Washington State University
Date: Fri, 8 Jan 93 21:31:57 GMT

In article <1993Jan8.142738.10180@bnr.ca> space@bcarh2b1 (Scott Pace) writes:
>Can anyone offer opinions on High-definition face shields, for day and
>night riding?
>
>Do they remove the need for sunglasses during the day?
>
>--
>Scott Pace, space@bnr.ca - the final frontier

I use a Hi-Def. face shield on my Shoei X-8.  Love it.  It works.  The          
amber color seems to be able to make things look bright without the             
glare.  Warm colors are enhanced, i.t., the yellow lines on roads simply        
glows.  Autumn colors are spectacular.  Cold colors are reduced.  Thus,         
blues and violets seem to lessen in brightness.  The Hi-Def effect is           
particularly nice at dawn and dusk.  The idea is that depth perception          
is reduced by scattering, which is primarily a factor of blue light.            
The amber color of the Hi-Def lens eliminates the blue and enhanced             
depth perception an definition.  The Shoei Hi-Def face shield is about          
$25 from Comp. Acces.                                                           
                                                                                
I like my face shield so much I bought a pair of glasses with polymer           
lenses and I had the lens made to the same color as the face shield.  I         
use both the face shield and the glosses at the same time.  It does not         
do what you might think.  There is very little extra effect from the            
face shield once you have adapted to the glasses.  Why would there be,          
they are the same color.  Once you've removed all the blue, another             
filter does little.  It does make the scene marginally darker.  Having          
the glasses and the face shield the same is nice because when you have          
to flip up the face shield, the world does not go suddenly blue-green.          
I typically wear my amber lenses during the summer as my primary eye            
correction.                                                                     

In my opinion, you could use a Hi-Def face shield instead of sunglasses for
all but the most blinding of riding conditions, i.e. snow fields or 
deserts or salt flats.
                                                                                
I do not use the Hi-Def face shield or glasses at night.  They do cut           
down on the total number of photons hitting the eyes, and these tired           
old eyes need all the help they can get.  Changing shields takes all of         
45 seconds at the outside.                                                      
                                                                                
Ride Enhanced,                                                                  
                                                                                
                                                                                
           Bill                                                                 
___________________________________________________________________             
johnsw@wsuvm1.csc.wsu.edu  prez=BIMC  KotV KotRR                                
DoD #00314  AMA #580924   Squid Index 3.0    WMTC #0002  KotD #0001             
Yamabeemer fjgs1200pdr100 and a Volvo.  What more could anyone ask?             
                                                                                
We have secretly replaced the small, precision quartz timing crystals           
in these new IC's with improved Folger's crystals.  Now, let's watch            
what happens....                                                                
Newsgroups: rec.motorcycles
From: Neil@swamp.demon.co.uk (njb)