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The Fallacy of the "JPEG+Raw" option
Dec 26, 2016 14:19:03 #
How many stops between 1/6sec to 1/4 sec????????????
Uuglypher wrote:
Scotty claims: br The difference between 1/25 sec ... (show quote)
Dec 26, 2016 19:52:56 #
steve_stoneblossom
Loc: Rhode Island, USA
Uuglypher wrote:
Scotty claims: br The difference between 1/25 sec ... (show quote)
Correct progression: 1/25>1/12>1/6>1/4>1/3
I think 2 2/3 was correct.
Dec 26, 2016 19:53:28 #
steve_stoneblossom
Loc: Rhode Island, USA
martinfisherphoto wrote:
How many stops between 1/6sec to 1/4 sec????????????
Roughly 2/3rds
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Dec 28, 2016 00:33:52 #
steve_stoneblossom wrote:
Roughly 2/3rds
"Well, selmslie claims the left image was actually @ 1/25 sec...that makes a 3 1/3 stop difference, (>1/12>1/6>1/3>1/4) which makes the difference in noise and shadow detail (due to increased tonal spectrum...) all the more interesting. "
The progression is by doubling the shutters open duration: 1/25 to 1/12 to 1/6 to 1/3 equals three stops.
Adding 1/4 sec is an additional 2/3 stop. I was off by 1/3 stop.
Is that what you were referring to , Martin?
Dave
Dec 28, 2016 00:39:35 #
Uuglypher wrote:
"Well, selmslie claims the left image was actually @ 1/25 sec...that makes a 3 1/3 stop difference, (>1/12>1/6>1/3>1/4) which makes the difference in noise and shadow detail (due to increased tonal spectrum...) all the more interesting. "
The progression is by doubling the shutters openduration: 1/25 to 1/12 to 1/6 to 1/3 equals three stops.
Adding 1/4 sec is an additional 2/3 stop.
Dave
The progression is by doubling the shutters openduration: 1/25 to 1/12 to 1/6 to 1/3 equals three stops.
Adding 1/4 sec is an additional 2/3 stop.
Dave
But isn't 1/4 sec faster than 1/3 sec, so that would be 1/3 stop subtracted from, not added to, 3 stops, giving 2-2/3 stops (as Selmslie stated)???
Dec 28, 2016 01:12:50 #
Hi, John
The way I see it:
The progression is by doubling the shutters open duration: 1/25 to 1/12 to 1/6 to 1/3 equals three stops.
Adding 1/4 sec is an additional 2/3 stop. I was off by 1/3 stop.
1/12 is twice the duration of 1/25 sec
1/6 is twice the duration of 1/12sec
1/3 is twice the duration of 1/6sec
1/4 (shorter than 1/3 sec.) is ~ 1/3 the progression to the next stop ( but is twice the duration of 1/8 which is immaterial here)
now...how badly have I embarassed myself?
Dave
The way I see it:
The progression is by doubling the shutters open duration: 1/25 to 1/12 to 1/6 to 1/3 equals three stops.
Adding 1/4 sec is an additional 2/3 stop. I was off by 1/3 stop.
1/12 is twice the duration of 1/25 sec
1/6 is twice the duration of 1/12sec
1/3 is twice the duration of 1/6sec
1/4 (shorter than 1/3 sec.) is ~ 1/3 the progression to the next stop ( but is twice the duration of 1/8 which is immaterial here)
now...how badly have I embarassed myself?
Dave
Dec 28, 2016 06:28:18 #
Take a deep breath and say I may be wrong. Check your math, it's ok to be wrong once in awhile......
You should only stop down to !/4 sec.
You go all the way down to 1/3 sec. which adds the extra stop.......
You should only stop down to !/4 sec.
You go all the way down to 1/3 sec. which adds the extra stop.......
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Dec 28, 2016 09:54:35 #
steve_stoneblossom
Loc: Rhode Island, USA
Uuglypher wrote:
Hi, John br The way I see it: br The progression i... (show quote)
Not badly, it took me some time, too.
1/25 to 1/12=1 stop
1/12 to 1/6=1 stop
1/6 to 1/3 WOULD be 1 stop, but
1/6 to 1/4 is only 2/3 stop
1+1+2/3=2 2/3
Dec 28, 2016 10:54:36 #
steve_stoneblossom wrote:
Not badly, it took me some time, too.
1/25 to 1/12=1 stop
1/12 to 1/6=1 stop
1/6 to 1/3 WOULD be 1 stop, but
1/6 to 1/4 is only 2/3 stop
1+1+2/3=2 2/3
1/25 to 1/12=1 stop
1/12 to 1/6=1 stop
1/6 to 1/3 WOULD be 1 stop, but
1/6 to 1/4 is only 2/3 stop
1+1+2/3=2 2/3
xxxxxxxxxxxxxxxxxxxxxx
And this took me some time, also!
A series of stops is just that: a "gapless" series...not a list with random gaps.
look at apertures: from f/1.4 to f/8 is 5 stops ( whether we go step-wise or simply jump from f/1.4 to f/8
1.4 2 2.8 4 5.6 8 is a gap of 5 stops
1/25 sec to 1/4 sec is 3 and ~1/3 stop
1/25th sec to 1/12 sec. to 1/6 sec to 1/3 sec to 1/4 sec is a gap of 3 and 1/3 stops
and 1/6 sec to 1/4 sec is 1 and ~ 1/3 stop (we don't get to leave out that pesky full stop between 1/6 sec and 1/3 sec) before moving on 1/4 sec.
(We are dealing with the total stops of exposure between the extremes of shutter durations)
Howzat?
The number of stops between ant two particular stops remains the same whether we get there step-wise of in a single jump.
Dave
Dec 28, 2016 11:11:43 #
steve_stoneblossom
Loc: Rhode Island, USA
Uuglypher wrote:
xxxxxxxxxxxxxxxxxxxxxx br br And this took me som... (show quote)
Herein lies the error:
1/25th sec to 1/12 sec. to 1/6 sec to 1/3 sec to 1/4 sec is a gap of 3 and 1/3 stops IS INCORRECT
The correct sequence is:
1/25th sec to 1/12, then 1/12 sec to 1/6 sec, then 1/6 sec TO 1/4 SEC, then 1/4 sec to 1/3 sec
-------one stop---------------one stop---------------------2/3 stop------------------irrelevant--------
2 and 2/3 stop total
Dec 28, 2016 11:15:53 #
steve_stoneblossom
Loc: Rhode Island, USA
steve_stoneblossom wrote:
Herein lies the error:
1/25th sec to 1/12 sec. to 1/6 sec to 1/3 sec to 1/4 sec is a gap of 3 and 1/3 stops IS INCORRECT
The correct sequence is:
1/25th sec to 1/12, then 1/12 sec to 1/6 sec, then 1/6 sec TO 1/4 SEC, then 1/4 sec to 1/3 sec
-------one stop---------------one stop---------------------2/3 stop------------------irrelevant--------
2 and 2/3 stop total
1/25th sec to 1/12 sec. to 1/6 sec to 1/3 sec to 1/4 sec is a gap of 3 and 1/3 stops IS INCORRECT
The correct sequence is:
1/25th sec to 1/12, then 1/12 sec to 1/6 sec, then 1/6 sec TO 1/4 SEC, then 1/4 sec to 1/3 sec
-------one stop---------------one stop---------------------2/3 stop------------------irrelevant--------
2 and 2/3 stop total
Another way to look at it: shutter speeds in 1/3 stop intervals (estimate) starting at 1/25 sec-
1/25-full stop
1/21
1/17
1/12- full stop
1/10
1/8
1/6- full stop
1/5
1/4
1/3-full stop
1/25 to 1/4 is 2 and 2/3 stops
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Dec 28, 2016 11:42:55 #
steve_stoneblossom wrote:
Another way to look at it: shutter speeds in 1/3 stop intervals (estimate) starting at 1/25 sec-
1/25-full stop
1/21
1/17
1/12- full stop
1/10
1/8
1/6- full stop
1/5
1/4
1/3-full stop
1/25 to 1/4 is 2 and 2/3 stops
1/25-full stop
1/21
1/17
1/12- full stop
1/10
1/8
1/6- full stop
1/5
1/4
1/3-full stop
1/25 to 1/4 is 2 and 2/3 stops
Steve, Martin, Selmslie...
very lucid and spot on.
You're right!
i was wrong!
I really should have had that second cipher of coffee!
Dave
Dec 28, 2016 12:00:49 #
steve_stoneblossom
Loc: Rhode Island, USA
Uuglypher wrote:
Steve, Martin, Selmslie...
very lucid and spot on.
You're right!
i was wrong!
I really should have had that second cipher of coffee!
Dave
very lucid and spot on.
You're right!
i was wrong!
I really should have had that second cipher of coffee!
Dave
It takes a big man...
Now if only that could put the debate to rest, but I know better. In regard to the whole ETTR/EBTR/ERADR matter, you both realize neither of you stands a snowball's chance in hell of convincing the other, no matter who attracts the most disciples, right?
This seems to me a good point at which to respectfully bow out.
Dec 28, 2016 12:04:52 #
steve_stoneblossom wrote:
It takes a big man...
Now if only that could put the debate to rest, but I know better. In regard to the whole ETTR/EBTR/ERADR matter, you both realize neither of you stands a snowball's chance in hell of convincing the other, no matter who attracts the most disciples, right?
This seems to me a good point at which to respectfully bow out.
Now if only that could put the debate to rest, but I know better. In regard to the whole ETTR/EBTR/ERADR matter, you both realize neither of you stands a snowball's chance in hell of convincing the other, no matter who attracts the most disciples, right?
This seems to me a good point at which to respectfully bow out.
I'll second that sentiment!
Dec 28, 2016 12:24:32 #
Uuglypher wrote:
Steve, Martin, Selmslie...
very lucid and spot on.
You're right!
i was wrong!
I really should have had that second cipher of coffee!
Dave
very lucid and spot on.
You're right!
i was wrong!
I really should have had that second cipher of coffee!
Dave
For those who trust the math in Excel:
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