👍🍻🍻 finally agree, well written. Exactly how exposure should be explained.
will give Dunno a new clipboard post. im so over the other one 😁
👍🍻🍻 finally agree, well written. Exactly how exposure should be explained.
will give Dunno a new clipboard post. im so over the other one 😁
@DonaldB has written: @bobn2 has written:Exposure' has had an established meaning in photography for getting on for 150 years. It was formalised by Hurter and Driffield as H = Et (modern notation) about 120 years ago. That's the way it's been being used by everyone who actually knows the basics of photography for all that time. The fact that you, and others that don't know their basics and choose to dispute it is one reason what we need a set of good articles on the basics and why we need some editorial control by people who actually know something.
We are not shooting with glass plates as the recording medium , or have you not realised it yet.
ive still noticed that ISO is in the image data. Lead from example if you are correct.Have you ever looked at how ISO is defined in the ISO standard for digital (12232)?
@DonaldB has written:Functional Stupidity.
If you want to start playing around with the word 'stupidity' you'll likely find that I'm much better at the art of insulting than you are, and here am not likely to suffer the same recriminations as DPReview. Shall we agree to stick to the technical side of things?
I love the whole Functional Stupidity research, it wasn't meant to be an insult , sorry if it come across that way.
I love the whole Functional Stupidity research, it wasn't meant to be an insult , sorry if it come across that way.
No problem. It's a phenomenon that I've been up against my whole working life.
When I look at the title of this thread I understand it to refer to the phenomenon that all threads here that have over 100 or so replies always degenerate into a discussion of exposure or ISO. I guess all fora have similar tendencies. For those that I frequent on harpsichord playing, their building and repair, the hoary chestnuts are wood types and what glue to use: 😁
David
@bobn2 has written: @DonaldB has written:the problem is, just shutter + aperture combined are useless.
Shutter + aperture combined are EV. Not useless, but not exposure either.
@DonaldB has written:thats why 99% of all sites and camera / lightmeter manuals site 3 adjustments not 2.
Maybe I can give you a very simple explanation, which might help you work this out.
ISO is a guide to setting exposure. Exposure means the amount of light (per unit area) at the sensor. When you set an ISO you are deciding on the exposure you will use. ISO is defined as 10/(exposure given by 18% grey object in the scene). Setting ISO programs the camera meter to centre at that exposure (so long as it can estimate what in the scene is 18%). Exposure is controlled by EV + scene luminance. If you can't change the scene luminance you change exposure by adjusting EV until the meter centres. Then you have the 'correct' exposure for the ISO that you set.👍🍻🍻 finally agree, well written. Exactly how exposure should be explained.
will give Dunno a new clipboard post. im so over the other one 😁
What I have always posted is totally consistent with Bob wrote.
Good to see you have finally seen the light and have given up on the misconception that exposure is how light or dark an image looks and that exposure is actually the amount of light that struck the sensor per unit area while the shutter was open.
When I look at the title of this thread I understand it to refer to the phenomenon that all threads here that have over 100 or so replies always degenerate into a discussion of exposure or ISO. I guess all fora have similar tendencies. For those that I frequent on harpsichord playing, their building and repair, the hoary chestnuts are wood types and what glue to use: 😁
David
Urea-formaldehyde (UF), also known as urea-methanal, so named for its common synthesis pathway and overall structure, is a nontransparent thermosetting resin or polymer. It is produced from urea and formaldehyde.🥶
@DonaldB has written: @bobn2 has written: @DonaldB has written:the problem is, just shutter + aperture combined are useless.
Shutter + aperture combined are EV. Not useless, but not exposure either.
@DonaldB has written:thats why 99% of all sites and camera / lightmeter manuals site 3 adjustments not 2.
Maybe I can give you a very simple explanation, which might help you work this out.
ISO is a guide to setting exposure. Exposure means the amount of light (per unit area) at the sensor. When you set an ISO you are deciding on the exposure you will use. ISO is defined as 10/(exposure given by 18% grey object in the scene). Setting ISO programs the camera meter to centre at that exposure (so long as it can estimate what in the scene is 18%). Exposure is controlled by EV + scene luminance. If you can't change the scene luminance you change exposure by adjusting EV until the meter centres. Then you have the 'correct' exposure for the ISO that you set.👍🍻🍻 finally agree, well written. Exactly how exposure should be explained.
will give Dunno a new clipboard post. im so over the other one 😁What I have always posted is totally consistent with Bob wrote.
Good to see you have finally seen the light and have given up on the misconception that exposure is how light or dark an image looks and that exposure is actually
the amount of light that struck the sensor per unit area while the shutter was open.
nt
nt...
For those that I frequent on harpsichord playing, their building and repair, the hoary chestnuts are wood types and what glue to use: 😁
I thought the vsrnish strength and type also had an effect. 😃
@DannoLeftForums has written: @DonaldB has written: @bobn2 has written: @DonaldB has written:the problem is, just shutter + aperture combined are useless.
Shutter + aperture combined are EV. Not useless, but not exposure either.
@DonaldB has written:thats why 99% of all sites and camera / lightmeter manuals site 3 adjustments not 2.
Maybe I can give you a very simple explanation, which might help you work this out.
ISO is a guide to setting exposure. Exposure means the amount of light (per unit area) at the sensor. When you set an ISO you are deciding on the exposure you will use. ISO is defined as 10/(exposure given by 18% grey object in the scene). Setting ISO programs the camera meter to centre at that exposure (so long as it can estimate what in the scene is 18%). Exposure is controlled by EV + scene luminance. If you can't change the scene luminance you change exposure by adjusting EV until the meter centres. Then you have the 'correct' exposure for the ISO that you set.👍🍻🍻 finally agree, well written. Exactly how exposure should be explained.
will give Dunno a new clipboard post. im so over the other one 😁What I have always posted is totally consistent with Bob wrote.
Good to see you have finally seen the light and have given up on the misconception that exposure is how light or dark an image looks and that exposure is actually
the amount of light that struck the sensor per unit area while the shutter was open.nt
By striking out that text you are then posting nonsense again because earlier Bob posted
Exposure means the amount of light (per unit area) at the sensor.
to which you replied
finally agree, well written. Exactly how exposure should be explained.
So you are in fact agreeing with Bob effectively saying exposure is the amount of light that struck the sensor per unit area while the shutter was open.
Good to see you have finally seen the light and have given up on the misconception that exposure is how light or dark an image looks and that exposure is actually the amount of light that struck the sensor per unit area while the shutter was open.
is totally consistent and accurate with what you agreed to with Bob.
The other option is you didn't understand at all what Bob posted and so had no idea about what you were actually agreeing to 😃
* exposure - amount of light that struck the sensor per unit area while the shutter was open
** optimal exposure - the maximum exposure* within dof and motion blur requirements without clipping important highlights.
*** under exposed - more exposure* could have been added with the DOF and blur constraints still being met without clipping important highlights.
@davidwien has written:When I look at the title of this thread I understand it to refer to the phenomenon that all threads here that have over 100 or so replies always degenerate into a discussion of exposure or ISO. I guess all fora have similar tendencies. For those that I frequent on harpsichord playing, their building and repair, the hoary chestnuts are wood types and what glue to use: 😁
David
Urea-formaldehyde (UF), also known as urea-methanal, so named for its common synthesis pathway and overall structure, is a nontransparent thermosetting resin or polymer. It is produced from urea and formaldehyde.🥶
Would need to be with the liquid hardner and not the power hardener unless you had gaps !! 😉
Danny.
will give Dunno a new clipboard post. im so over the other one
hehehehe 😄
You better sit back and get used to it because it ain't goin' nowhere 😎
Now now, children. Play nicely please.
Alan [who seems, at times, to be the nanny for Donald and Danno 😁]
Now now, children. Play nicely please.
Alan [who seems, at times, to be the nanny for Donald and Danno 😁]
ok Nanny Fine 🙂
@davidwien has written:When I look at the title of this thread I understand it to refer to the phenomenon that all threads here that have over 100 or so replies always degenerate into a discussion of exposure or ISO. I guess all fora have similar tendencies. For those that I frequent on harpsichord playing, their building and repair, the hoary chestnuts are wood types and what glue to use: 😁
David
Urea-formaldehyde (UF), also known as urea-methanal, so named for its common synthesis pathway and overall structure, is a nontransparent thermosetting resin or polymer. It is produced from urea and formaldehyde.🥶
Old fashioned hide glue is the glue of choice for harpsichords, as it holds tight, yet can be unglued.
David
@davidwien has written:For those that I frequent on harpsichord playing, their building and repair, the hoary chestnuts are wood types and what glue to use: 😁
I thought the vsrnish strength and type also had an effect. 😃
NO varnish on harpsichords, unless you count the cases of English-style instrumnts. Unlike violins, etc, it would have a bad effect on the sound if applied to the working parts.
David
I'm not sure why we're getting into arguments about exposure again, especially in this thread. Bobn2 was on the right track with his response, but I find it still problematic.
Exposure is what is presented at the image sensor to collect (Light filtered by aperture filtered by shutter speed). ISO is akin to processing that exposure. But just as with film you could under develop or over develop "the exposure", you can do so with a digital camera, too. Get the ISO "right" and you have optimal data for viewing and/or further processing. Get the ISO "wrong" and you don't have optimal data. Too low an ISO will get you into bit/noise hell, too high an ISO will truncate data. But the important thing to note is that ISO is post exposure, not pre. That said, people can use ISO to change exposure so that they can optimize the captured data. However, camera makers don't give us the appropriate tools to do that for the most part.
That said, people can use ISO to change exposure so that they can optimize the captured data. However, camera makers don't give us the appropriate tools to do that for the most part.
I'm not sure what you mean by that, Thom. The only way that ISO changes exposure is via the aperture and shutter speed.