Another test that would be interesting (before the drink, perhaps) is to
test the spotmeter against a contrasty motive to find out if the split-image
screen makes light leak to the spot area more than with the original screen.
I guess this could be performed by setting up one black and one white screen
next to each other. With the original screen, aim the camera so that the
spot area points at either the black or the white screen (so that the
reading is only influenced by this screen). Then, slowly move the camera
towards the other screen until the reading changes. This could indicate the
leakage of the system (some of it will be caused by flare in the lens, so
choose a SMC prime lens without any filter attached). Then, do the same
thing with the ZM-M screen to see if the spotmeter behaves differently.
And, at last - analyse, spread the word to the list, and finish with the
drink!
/Erik
-----Original Message-----
From: Alin Flaider [mailto:[EMAIL PROTECTED]]
Sent: den 29 augusti 2001 13:53
To: John A. Hufnagel
Subject: Re: ZX-5n and the replaced screen
John wrote:
JAH> A lot of people have stated with absolute certainty that the spot meter
JAH> will fail to work properly with the screen out of a ZX-M. I'd
JAH> appreciate it if someone would describe to me how to prove this because
JAH> all the tests I've run have shown the spot meter to be working as it
did
JAH> before the replaced screen.
John,
I'm afraid you have to fit the original screen for this, take a spot
reading of some uniformly lit area, then replace it with the split
prism screen and measure the very same point, using the same lens.
Frankly, I expect 0.5-1 stops difference.
JAH> Also, please fill me in on how to test the exposure compensation also.
JAH> As far as I can tell nothing is working improperly with the new screen.
I don't see why the compensation shouldn't work, even without a
screen!
JAH> Maybe I should have a few drinks in me before I test anymore. =P
Good approach. We're too close to our tools to be scientifically
impartial, anyway. ;o)
Servus, Alin
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