Not intentionally; I may have misunderstood your comment or not expressed myself clearly and acutely enough. I misspoke, it seems, as I re-read my reply.
A 200 setting and a 400 setting will definitely give a 1-stop difference.
What I was trying to say is that meters did not change because of the safety factor change.
If you set 400 on a pre-1960 meter film speed dial, would it recommend the same camera setting as a post ASA change meter also set to 400?
I don't think it will, because, for the same film rating number (not the same film) the ASA standard provided for more exposure prior to 1960 than it did after 1960.
I’m holding it according to the manual. A tad downwards.A half stop difference is quite possible but is more likely a result in how you held the meter. The Weston instructions discuss this... and I assure you that it makes a difference.
I think the "by design" discussion you are recalling is about the manufacturer's decision on constants, K and C, which is common to all meters. Some have incorrectly hypothesized that these constants are so profound that they make a big difference (they don't) and that it is manipulation by the manufacturers to trick photographers with incorrect exposure recommendations (it isn't). The effect of these metering constants is rather subtle, especially when compared to film speed "safety factors", which Matt alluded to but in the wrong context for this discussion.
And when that happened, did you change the speed setting on your meter?Again the first sentence is correct. I was there when it happened. Ektachrome when from 32 ASA to 64 ASA. Tri-X went from 200 ASA to 400 ASA.
And when that happened, did you change the speed setting on your meter?
And when you did, did the meter tell you to change the exposure setting on your camera?
And what exposure setting did a newer, post 1960 meter recommend if it was the set to the same ASA as the older meter?
Instructions from where - the film suppliers, or the meter manufacturers?All the instructions said to raise the ASA setting to twice the speed.
Instructions from where - the film suppliers, or the meter manufacturers?
FWIW, I was 4 years old in 1960.
And I thought I was an old dude. I'm a punk next to Matt.FWIW, I was 4 years old in 1960.
I say miraculously but am teasing. Old and New ASA are the same on meter dials.
Speaking about "Rocky Mountain Oysters": at the time in the French Foreign Legion, it was habit for a legionair, before engaging the 'act' with a lady, to sit in a dish with 'hot' water in order to warm his goodies so not to create offspring (the hygienic effect was a rather minor detail on that very moment). In the Sahara, Latex wasn't always that secure then, and radars didn't exist...That reminds me of the time, many decades ago when I flew on an Air Force Reserve flight on a C-130 cargo airplane as 'cargo' while I was an officer in the Army, my friend who was part of flight crew warned me into the plane when they were getting ready to do a function check on the radar, about the possiblity of having fried 'Rocky Mountain oysters' by standing in front of the plane during test.
No not at all. To prove it, pick up a Weston Master III which is the first of their meters using ASA, dial in “Sunny 16” settings. Then change the ASA to pre-1960, and look at the Sunny 16 again. Notice the arrow still points at just above the “Light” number 200.A meter with a setting for film speed using the older, pre-1960 standard will give an exposure setting recommendation one stop different than a meter with a setting for film speed using the newer, post-1960 standard.
No not at all. To prove it, pick up a Weston Master III which is the first of their meters using ASA, dial in “Sunny 16” settings. Then change the ASA to pre-1960, and look at the Sunny 16 again. Notice the arrow still points at just above the “Light” number 200.
You’ll also realize the only thing you changed was 400 to 200 in two places.
The only way I could prove it to myself was to hold the meter in my hands and try it. Word games can fool you every time.
See my post here:@MattKing unless you meant a meter set for 400 vs a meter set for 200… then there is a stop difference.
I slept on this.
You are right. The old, pre-1960 ASA was designed to give you denser negatives. The meters - pre and post 1960 - work the same.
I knew you couldn’t believe the meters changed, though it is a mind game that’s easy to lose for a minuteI slept on this.
You are right. The old, pre-1960 ASA was designed to give you denser negatives. The meters - pre and post 1960 - work the same.
For all the money and time spend on bad selenium lightmeters I could have bought at least two or three Sekonic L-398A.@Helge Your Weston Master IV might be bad (non linearity in the high range). I had one or two bad Weston meters (bad still even after trying to fix). Just buy another one. They are such good values that you can take a chance.
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