Rich41, I think your question shows sound thinking and understanding.
Out of context (sorry I never bought the book so don't have the page to refer), it's hard to say what is going on with those instructions.
From what you told us, it sure sounds like the instructions have you misplace a half f/stop and do same adjustment twice.
se the author of that book and the text in question,I feel responsible to help you.please send all requests to rlambrec@icloud.com and give me a day or two.I am a confused newbie and have a question for those of you who might have used the elaborate and precise method in WBM of predicting effective film speeds. On page 222, in step 3, it says, with your lightmeter on a Kodak Gray Card, "Place the reading on Zone I.5 and determine the exposure for an aperture closed down by 4 stops." I don't know how to complete this step.
My first problem is why doesn't it say to close down aperture by 3.5 stops. It seems to me that 4 stops would put the exposure on Zone I, not Zone I.5.
My second problem is why is this instruction broken into two smaller steps. Isn't "Place the reading on Zone I.5 and determine the exposure for an aperture closed down by 4 stops" just one step? Yet there is a big AND between them which to me implies two steps. It is a signal to me that I don't understand what the authors want me to do.
Can someone help me?
This is the section being discussed in B1.
“3. Place the reading on Zone 1.5 and determine the exposure for a medium aperture. Keep the exposure time within 1/8 and 1/250 of a second or modify the aperture.”
This is the section being discussed in B2.
“3. Place the reading on Zone 1.5 and determine the exposure for an aperture closed down by 4 stops. Keep the exposure time within 1/8 and 1/125 of a second or modify the aperture.”
What Ralph is saying to do, is to place your light meter over the illustrated section of the gray card. (centre of the grey card) take a reading, then place that reading on Zone 1.5.
---You then determine what aperture you have come up with. Then take that aperture and close down 4 stops.---
This is your starting point.
...By the way, Rich41, welcome to the forum and do not be afraid to ask any question, we will (mostly) try and help you.
Mick.
se the author of that book and the text in question,I feel responsible to help you.please send all requests to rlambrec@icloud.com and give me a day or two.
RalphLambrecht thanks for your response. The email you gave me doesn't seem to work, perhaps, as another member has noted, there is an error.
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