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### why is 1/60 to 1/125 is full stop or halving the abount of light? [duplicate]

the halving of 1/60 is 1/120 then why is that standard 1/125 for a full stop? is 1/125 really cutting the amount in half? Thanks
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### What scale of shutter speeds actually lies behind the numbers? [duplicate]

On nearly every camera I've used, the scale of shutter speeds goes something like: 1s, 1/2s, 1/4s, 1/8s, 1/15s, 1/30s, 1/60s, 1/120s, 1/250s, 1/500s, 1/1000s, 1/2000s whereas clearly a scale of ...
174 views

### Is there particular significance to the shutter speeds ¹⁄₁₂₅th and ¹⁄₃₀th? [duplicate]

I am sure this is a common question, but to find it easily, what is significant about 1/125 and 1/30? My teacher asked us and I have no idea. I can not find it anywhere. Why are these shutter speeds ...
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131 views

### Generate a sequence of exposure time options mathematically [duplicate]

Is there a way to generate a sequence of usual/standard exposure time options mathematically? Something like 1/5000, 1/2500, 1/1500, 1/1000...1/500, 1/250/ 1/125...1/60...1/30...1/8, 1/4, 1/2, 1, 2, 3,...
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### What is an easy way to remember the full stop scale?

If you were teaching someone new to photography the full stop scales, is there a better way then flat out memorizing these values? Does anyone have an easy way that they remember the scale? Would it ...
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7k views

### What is exposure compensation?

What does exposure compensation do? If I take a photo with a given shutter speed, aperature, and ISO, and then take the same shot with +1EV or -1EV, what is actually happening? Is this just a gain ...
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### Do f-stop and exposure time perfectly cancel?

I am photographing a scene with white and black elements in it. Starting at the f/22 stop, I widen the aperture one stop and decrease the exposure time by a factor of 2, take a picture, and keep doing ...
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### Why are these film photos brighter than digital photos taken at the same time with the same settings?

I took two photos - first one with Canon 5D Mark III and the second one with analog Canon EOS 500N. I used the same lens (Canon 50mm ƒ/1.4) and settings (ISO/shutter/aperture) for both of them. The ...
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### Will metering from a DSLR apply to a film SLR?

I still like to shoot with film (I use a Nikon F3) but I like the immediate feedback of digital. I'm thinking of buying a used DSLR to help me get the framing and lighting right when I shoot static ...
8k views

### Do the same camera settings lead to the same exposure across different sensor sizes?

Let's say I have a micro-4/3rd camera and a full frame camera, both set to 1/60 at f/2.8, taking a picture of the same scene in the same lighting. Will the exposure be the same across both cameras ...
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### What is the relationship between ISO, aperture, and shutter speed?

I know digital cameras have ISO options, and that ISO is the camera's sensitivity to light, but if you set higher ISO then you can get a noisy image. I also know there are two other camera options, ...
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3k views

### Why are 1/3 stop apertures uneven numbers apart?

Why do 1/3 stop apertures go like 8, 9, 10, 11, 13, 14, 16, 18? There's a difference of 2 between 11 and 13, it goes back to 1 between 13 and 14, and it goes back up to 2.
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### Does a long exposure in DSLR camera have a similar effect to a global shutter?

Regular DSLRs make use of mechanical shutters and progressive electrical readouts, and hence images are captured in a rolling shutter. But, when used to capture pictures with a long exposure, where ...
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700 views

### Are the aperture, ISO and shutter speed stops perfectly interchangeable?

Imagine you have an scene with shutter speed 1/60, f/8 and ISO 200. Then you change the configuration to get an equivalent exposure: speed 1/120, f/5.6, ISO 200 (plus one stop in speed, minus one stop ...
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