Hey, you guys are really good. You are exactly right. I used only the spot
meter in the slot canyon. Therefore, the exposure reading was "memorized"
by the Om4t and even though there was no film in the OM4t, it gave a proper
exposure reading for the Pentax 67 since there was no reflectance issue
involved. The length of time the Om4t shutter was open was an accurate
measurement of how long to keep open the Pentax 67 shutter and resulted in
the proper exposures I noted. Thanks for making clear why what I did
worked!
Ron Crabtree
Santa Fe, NM
-----Original Message-----
From: Joel Wilcox <jowilcox@xxxxxxxxxxxxxxxxxxx>
To: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
Date: Monday, May 17, 1999 2:14 PM
Subject: Re: [OM] Slot canyon help and low light spot metering
>At 10:47 AM 5/17/99 EDT, you wrote:
>>I think with the OM4 once you take your spot measurements that exposure
>>reading is memorized. OTF metering only comes into play when using flash
or
>>averaging metering. I think a previous poster had used his OM4 as a meter,
>>without film, to time the shutter for his P67 and the results were fine.
My
>>guess is that he used spot or spot averaging. If he had used auto (center
>>weighted), he would have had a couple of stops of overexposure due to the
>>exposure reading off of the pressure plate. But in slot canyons who knows.
>>
>>Warren
>>
>
>Then that would explain why Ron Crabtree got good results using his OM-4
>without film and putting a spot reading in memory and syncing an exposure
>based on this value with his Pentax 6x7. The exposure value based on the
>spot reading would be related to pre-programmed OTF values but not based on
>an OTF reading per se. Thanks for clarifying this, Warren.
>
>
>Joel Wilcox
>Iowa City, Iowa USA
>
>< This message was delivered via the Olympus Mailing List >
>< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
>< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
>
>
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|