Toxic gas cylinders listed here must be kept in a continuously, mechanically ventilated enclosure. Additionally, all compressed gas cylinders having a NFPA Health Hazard Rating of 3 or 4 (e.g. ammonia, chlorine, phosgene) and those with a Health Hazard Rating of 2 but no physiological warning properties (e.g. carbon monoxide) must be kept in a gas cylinder cabinet. EHS can help you determine the Health Hazard Rating of your compressed gases.

When you push the shutter button to take an image, the shutter opens and the sensor is exposed to light for the amount of time denoted by the shutter speed setting.

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An image attribute is a specific visual effect obtained from different camera settings such as f-stop, ISO & shutter speed.

Prior to taking the image, take a mental guess at the image attribute a specific shutter speed may produce for a specific shooting scenario.

Without slightly overexposing the highlights, I would have lost data in the dark parts of the image, as shown in the following histogram.

Taking your camera outside and experimenting is the only way to really understand the best shutter speeds for every shot.

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All of the information above provides the foundation for selecting the best camera settings using the Photography Exposure Triangle.

Using ETTR / Expose to the Right, the photographer can capture extra information from the dark parts of the scene than they could have with a standard exposure.

Shortening the shutter speed, producing a shorter exposure time, forces the image sensor to collect less light information, producing a darker image with less motion blur.

An exposure stop, or stop for short, provides a universal scale to measure the increase and decrease in light, exposed to the image sensor, due to changes in shutter speed & f-stop.

The question, “What Shutter Speed Do I Use?”, leads down the path of dependence, without an actual understanding of the topic.

Technical Note: DSLR cameras have a physical shutter. Mirrorless cameras do not. Other than this fact shutter speed works in the same manner for both.

The following images are unedited RAW files showing actual outcomes of varying shutter speeds without changes due to photo editing.

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To maintain constant image brightness, while increasing or decreasing shutter speed, changes in ISO or f-stop must be made by the same number of stops in the opposite direction.

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Cool colors, as shown below, and taught in the Color Theory Photography Guide, also produce calming effects on the overall mood.

Using varying shutter speeds the photographer can add “interestingness” to the photo by showing movement in a still picture.

The TASER cartridge is designed for use with both the TASER M26 and the TASER X26 systems. It uses compressed nitrogen to propel two darts to the target.

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For example, a stop up in shutter speed would require a stop down in ISO, f-stop, or a combination of both, to maintain the same image brightness.

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These slow shutter speeds are used for long exposure low light conditions including, milky way, star trail, and northern lights photography.

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When this value is exceeded, too much light is collected, and the pixel becomes “clipped”, also known as, “overexposed”, or “blown out”.

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As more light information is collected by the image sensor, over the allotted exposure time, more detail & data are displayed in the final image, resulting in less image noise.

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Cylinders stored in gas cylinder cabinets or other ventilated enclosures must be secured at all times. Cylinders should be firmly secured at their center of gravity, not near the top or bottom.

The following shutter speed ranges are provided to help you visualize varying exposure times & their corresponding image attributes.

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Due to the shutter speed of 1/15th of a second, in the image below, water movement details are visible, producing a dynamic effect.

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Lengthening the shutter speed, producing a longer exposure time, allows the image sensor to collect more light information, producing a brighter image with increased motion blur.

The ideal exposure is achieved when each pixel collects as much light as possible, without any pixels “blowing out”, or becoming pure white.

Full size cylinders must be stored in a gas cylinder cabinet while smaller cylinders, e.g., lecture bottles, can be stored in a chemical fume hood, a storage cabinet under the fume hood (if ventilated), or some other ventilated enclosure. No more than two small cylinders should be stored in single cabinet. When stored in a cabinet or hood, small cylinders must be positioned and secured so that they will not fall out and be fixed to a stationary object.

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