Well, we've had focal plane shutters (a misnomer no matter which definition of focal plane you use) for a long time. And we talk about depth of field in front of the lens, and depth of focus behind the lens...
Deleted
May 30, 2023
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I know - it's where photographers' parlance is out of key with optical parlance. But we know what they mean 😉
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Agreed. Like saying that the steering wheel changes the speed of the car - yes it does but...
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Ah, but such wonderful hogwash, full bodied, earthy, long on the palate, nervous, round, blah, blah, blah ...
But wait, there's another article :
The Exposure Triangle Sucks, Here’s Why
petapixel.com/2016/07/18/never-teach-exposure-triangle-beginners/The more recent article is just a memory test.
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Especially this forum. It's like a house of mirrors. Everyone is an "expert" and none of them agree with one-another.
It's a bit like going to the circus and watching the clowns.
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No that is not quite right.
If you read through the posts/articles of IliahBorg, JimKasson, Bobn2, MichaelFryd, Richard Butler (DPReview) et al you will see that they all say pretty much the same thing about what ISO is and its purpose.
These 2 posts/articles also say pretty much the same as they do.
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Its funny because all those people you named use the iso control in there cameras the same as everyone else in the world.
so whats your argument again 😵💫😒🙄 -
What iso is and its purpose doesn't necessarily dictate how people must use iso.
For example, I normally use Auto ISO.
Another option is to set iso manually.
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That would seem to exhaust the options...
David
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Yep, that was the point I was making 🤗 in reply to DonaldB's comment implying that everyone in the world uses ISO in the same way which is ludicrous.
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On some of my cameras I use direct sensor gain programming and never touch ISO control.
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It's a shame that camera manufacturers haven't thought to fit a 'set ISO randomly' control.
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Actually, as speed is a scalar quantity, I suspect you mean velocity.
David
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No, I meant the speed.
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can you be more specific
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It's like with video cameras, direct control, in dB or EV.
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But you did realize what David meant, I hope. With velocity being a vector, and any movement of the steering wheel changing the direction of motion.
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Let me see if I’ve got this right. If it’s scalar, the consequence of turning the wheel changes speed by scrubbing energy from the wheels as the sidewalls of the tires encounter resistance against the road. If it’s vector, you’re exchanging distance/time in the x axis for d/t in the y axis (and probably z axis as well).
Inquiring minds need to know.
Rich
