“stopped down” meaning?

5 years 6 days ago #640687 by TGonzo
I've heard this phrase mentioned a couple times and get that it has something to do with the lens, but can't get my head around understanding why.   "Stopped down"?  It doesn't even sound right. 

Do you know how this term is intended or is this slang?


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5 years 6 days ago #640698 by Troponin

TGonzo wrote: I've heard this phrase mentioned a couple times and get that it has something to do with the lens, but can't get my head around understanding why.   "Stopped down"?  It doesn't even sound right. 

Do you know how this term is intended or is this slang?


Stopping down = Increasing the aperture number which makes the aperture smaller, decreasing the light being able to get through. “Stops” are also in reference to light, as they step up or down”. 


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5 years 6 days ago #640701 by Nikon Shooter

Troponin wrote: Stopping down = Increasing the aperture number which makes the aperture smaller, decreasing the light being able to get through.


Yes, correct but only in one aspect, the second is related to DoF.

Stopping down — by say one stop value — means to half the ex-
posure in one of three ways: ƒ stop, time, and ISO.

The reason to stop down by one or more stops may be to correct
the exposure, increase DoF, or freeze an action for example.

In general terms, a click of any of the three ways will cut 50% off
the light previously set to capture.

The thing works both ways. Stop up is to double.

Light is free… capturing it is not!
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5 years 6 days ago #640714 by Troponin

Nikon Shooter wrote:

Troponin wrote: Stopping down = decreasing the light being able to get through.


Yes, correct but only in one aspect, the second is related to DoF.

Stopping down... means to half the ex-
posure in one of three ways: ƒ stop...


I don’t follow. Didn’t you just repeat what I said, but in other words? 


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5 years 6 days ago #640716 by Nikon Shooter
I confirmed your post and extended the definition to the
other uses and their flexibility and benefit.

Light is free… capturing it is not!
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5 years 6 days ago #640739 by GaryA
The Lens Aperture is measured in "F Stops" (2, 2.8, 4 et cetera).  Stopped Down is referenced a small aperture opening. A Stop will either increase the exposure by a factor of 2/doubled (Stopped Up) or decrease the exposure by a factor of 2/halved (Stopped Down). 

There are photographs everywhere. It is the call of photographers to see and capture those images.
www: garyayala.com

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5 years 6 days ago #640740 by garyrhook
Actually, a little bit of googling consistently shows that "stopping down" refers specifically to changing the aperture (i.e. making it smaller). Even Mirriam Webster uses this definition for the term.

I've not run across anyone else that attempted to expand the definition by referring to adjusting exposure. Of course, my experience is limited to a handful of years. And the knowledge of the google.

So unless NS gets to redefine terms already in common use (no, it turns out, you don't) then what I think he meant was, "I conflated by trying to involve other uses and their flexibility and benefit [sic]." I, for one, am not clear how that helps answer the OP's question.


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The following user(s) said Thank You: icepics
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5 years 6 days ago - 5 years 6 days ago #640741 by icepics
If you stop down a lens you're going from say, f4 to f5.6 to f8 to f11... each time you cut the light in half. Each is considered to be a stop. You're stopping 'down' because of the settings being fractions that get progessively smaller.

Sharon
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4 years 11 months ago #642916 by fmw
It is photographic slang.  Prior to the digital age, the f stops (2.8, 4, 5.6, 8 etc) were marked on the lens aperture ring and were accompanied by a detent that would stop the ring at the desired setting.  So stop means f stop and it was turned into a verb by photographers.  So moving from one f stop to another smaller one was termed "stopping down.''. 

With preset lenses one had to be sure he was stopped down before firing the shutter.  Or he may want to stop down to increase depth of field.  We old timers use the term regularly.


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