On Thu, 25 Oct 2001 17:26:57 -0700 Chip Louie <[EMAIL PROTECTED]> writes:
> Also the EOS 1N RS does give up some finder brightness and a 1/3 of a
stop
> in lens speed. This is why faster glass is better with this lens and
low
> light shooting is less of an option as AF and metering is also off by 1
EV
> due to the mirror's light loss.
>
> Chip Louie
That would be 2/3 stop light loss to the film and actually *more* light
to the AF sensor and spot meter. The viewfinder and evaluative meters
receive 1 stop less light.
The 1N has a 63%/37% mirror:
67% of the light gets reflected to the viewfinder and evaluative
meter
37% of the light gets transmitted to the AF and spot meter
sensors
100% of the light gets transmitted to the film (mirror not an
issue - no light loss)
The 1NRS has a 35%/65% mirror:
35% of the light gets reflected to the viewfinder and evaluative
meter
65% of the light gets transmitted to the AF and spot meter
sensors
65% of the light gets transmitted to the film (2/3 stop light
loss)
Dave Herzstein
[EMAIL PROTECTED]
http://www.kjsl.com/~dave
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