New answers tagged long-exposure
6
Fireworks require a long exposure. In this case, the photographer shifted focus while the camera was capturing the fireworks. For this reason, the shape has points from the time the image was in focus it widens as the image was pulled out of focus.
It is easiest to start with the image in focus and then defocus as time passes, rather than the other way ...
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Light Trails
This style of photography is often referred to as light trails.
Photoshop is not necessarily needed. Effects like this can be achieved on a single photograph without multiple exposures.
1. You need darkness for this style. Even though the photo may end up looking light, absolute darkness is needed do this sort of photography. Usually this ...
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It looks to me like they used a sparkler(hand held firework) and physically drew around the outline of the car and road. To do this of course you would need a very long shutter speed. For example if the outline of the car took 2mins, you would need at a minimum of a 2min exposure. It would also be possible to stack multiple exposures to achieve this if the ...
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Concerning the comment by the author "Now say two cameras one with 30s and another with 8sec longer explosure. Which is best?"
In case you are really comparing two camera models, check if a camera has a BULB mode. This allows to use an arbitrary exposure time by manually stopping the exposure (best using a remote control to avoid camera shake). So a camera ...
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While we've mostly changed from film to digital sensors, a photograph is still formed by the summation of the photons that hit pixels (or phosphors in film) over the period of time during which it is being developed. A long exposure gives more time for photons to hit the sensor and thus produces a "brighter" image. If the shutter is open for 3 times the ...
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Why 8s or 30s?
Longer exposure allow you to:
get more light to reach the captor (night, etc)
have nice blurry effects (waterfalls, etc) (in that case, usually you need a dark ND filter to compensate, so that during that long exposure you don't overexpose). For exemple: photograph of buildings, using the maximum ND filter available, will make people/cars ...
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What you are referring to is shutter-speed. It can range from fractions of a second to hours. Most large-sensor cameras offer a range from around 1/4000s to 30s. The longer the time, the more light gets in.
At some point, usually over a second or so, people call it a long exposure. There is no point at which it becomes long but there is a point at which you ...
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You'll want to use longer exposures at night in conjunction with a tripod. It will help you capture more of what little light is available and give you clearer pictures.
If you use it during the day, you'll see blur effects for things in motion. The longer the exposure, the longer the blur "streak." I can't think of anything I'd use a 30s shutter speed for ...
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In quite a few cases ND filters can be a disadvantage. Filters cost money(especially high quality ones), they can appear in the frame, they require extra equipment(space, weight, time), they can introduce defects, etc. Another user has already pointed out why stopping down your aperture can cause problems.
In reality, it is hard to image when one would not ...
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At least with diffraction you can do full-frame sharpening since the softness is distributed evenly...
Some disadvantages of an ND filter:
An ND filter adds another layer of glass to the lens and will increase the chance of flare, depending on the quality of the filter.
Strong ND filters on wide angle lenses can (because an extreme angle of view changes ...
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There is a point where lenses transition from being aberration limited to being diffraction limited. This means that peak sharpness will increase up to a point as you stop down but will then start to decrease again. If you don't care about depth of field then use of an ND filter is preferable to stopping down past this point.
Of course ND filters aren't ...
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