Stops
May 11, 2017 11:18:51 #
Haydon wrote:
Some strobes are metered in 1/10 stop increments and I find it problematic to a represented number when I'm use to 1/3 stops in camera.
Because if you want to display 1/10 stop in f number you would need too many digits.
May 11, 2017 11:24:07 #
a6k wrote:
Now for shutter speeds, it's the amount of time the shutter is open. That's why you will see 1/30, 1/60 and so on. for reasons of convenience, they usually go from 60 to 125 instead of 120 then it's as expected: 125, 250, 500 and so on. Of course, electronic camera can do all the in-between's too, both for lens openings (aperture) and shutter speeds.
Now for shutter speeds, it's the amount of time the shutter is open. That's why you will see 1/30, 1/60 and so on. for reasons of convenience, they usually go from 60 to 125 instead of 120 then it's as expected: 125, 250, 500 and so on. Of course, electronic camera can do all the in-between's too, both for lens openings (aperture) and shutter speeds.
The shutter speed sequence is supposed to be 1/32, 1/64, 1/128, 1/256, 1/512.
Although in automatic mode the camera would set the shutter speed as a continuously variable but they still display in steps. Typical the steps are 1/3 stop.
May 11, 2017 13:35:00 #
BebuLamar wrote:
Because if you want to display 1/10 stop in f number you would need too many digits.
Agreed, I stop (pun intended) myself from going crazy by turning one, two or three clicks equally 1/3 of a stop each when I'm close to .3 .6 or .9. That way I'm only off by one 1/10 of a stop which really isn't noticeable and that varies depending on artistic expression.
May 11, 2017 13:44:37 #
jerryc41 wrote:
Yes, you can, but the fewer filters the better. Sometimes, you don't have a choice. Another consideration is vignetting. The more things you have in front of your lens, and the wider your lens, the greater the chance of vignetting.
VIGNETTING, l like them with cinnamon and melted cheese spread over the top , yummy yum yum !
May 11, 2017 13:59:24 #
BlackRipleyDog wrote:
Hey guys, Sounds like it is trolling time again on the UHH.
Are you saying that because it's a good basic question?
Perhaps it's beneath your dignity.
Fear not; we commoners will "feed the troll" and perhaps someone will learn something also.
May 11, 2017 14:00:13 #
BebuLamar wrote:
What do you mean? Most new cameras show in 1/3 stop
Could be she dident get in to the page where you can set them yet ,
May 12, 2017 07:24:40 #
SharpShooter wrote:
GKR, welcome to the Hog!
About the stops...., I might have to stop but don't have time to stop and explain it right now!!! LoL
SS
About the stops...., I might have to stop but don't have time to stop and explain it right now!!! LoL
SS
Now that's funny SS, I like your sense of humor!
May 12, 2017 07:33:40 #
Longshadow wrote:
I wonder if the "stop" association originally came from the lens- when adjusting the aperture, there are clicks at each position, where the ring "stops" turning when it hits a detent. .
Let's exactly right. Originally, there was a dial which opened and closed the aperture smoothly, continuously. Eventually, they put click-stops on the dial in the spots where it amount of light doubled. Similarly, click-stops were added to the dial which controlled shutter speed.
May 12, 2017 07:34:04 #
BlackRipleyDog wrote:
Hey guys, Sounds like it is trolling time again on the UHH.
May 12, 2017 07:37:02 #
I don't understand how you could decide to buy an ND filter without first having an understanding of exposure. That is unless you read that ND filters are good to have.
Still no reason not to answer the original question which several members have done quite well.
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Still no reason not to answer the original question which several members have done quite well.
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May 12, 2017 08:33:07 #
GKR wrote:
What are stops, how do I use then and are they necessary?
f/stop = how many times you can divide the width of the lens aperture into its focal length. So f/8 on a 50mm lens is 50/8 mm. f/8 on a 100mm lens is 100/8mm.
Theoretically, f/8 on ANY lens lets in the same amount of light (due to the change in focal length). In practice, there are minor variations in actual light transmission.
The scale is based on the square root of two. Whole stops are (f/) 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32... Each whole stop adjustment doubles or halves the volume of light going through the lens.
To render a scene correctly, your sensor must be given the same amount of photons (light). So you can adjust the COMBINATION of f/stop, shutter speed, and ISO to balance the exposure to the light level.
An ND filter allows you to use a wider aperture or longer shutter speed for effect, in very bright conditions. Maybe you want to slow the shutter to get that fake, cliche look of a waterfall. Maybe you want a wide aperture to throw the background out of focus. ND filters let you do that. You need to know how many stops of light reduction you want to buy...
A doubling or halving of the ISO or shutter speed is also called a "stop".
May 12, 2017 08:41:47 #
If you have a digital camera, drop the ISO down to about 10 and you won't need any ND filters that knock off 10 stops. But you DO need the book recommended..... For a beginner, you've asked a question that can be incredibly complex instead of just a simple answer. Nyms
May 12, 2017 08:53:47 #
May 12, 2017 08:57:33 #
May 12, 2017 09:20:49 #
Stops of light are within the realm of basic photography. You have to understand what stops are and what are they used for. In a nutshell, f stops refer to the lens openings which are designated by f numbers. High numbers are used for small openings like f16 for instance and smaller numbers for wider ones like f5.6. Shutter speeds are also stops and openings and shutter speeds work together to form the exposure. There has to be plenty of information in the Internet, do a Google search.
If you are seriously considering photography I recommend that you study the basics. An old lens have the f stops engraved in the barrel while modern cameras have them electronically.
If you are seriously considering photography I recommend that you study the basics. An old lens have the f stops engraved in the barrel while modern cameras have them electronically.
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