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Comparison Meike Speedlite MK-950 II vs Meike Speedlite MK-950

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Meike Speedlite MK-950 II
Meike Speedlite MK-950
Meike Speedlite MK-950 IIMeike Speedlite MK-950
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Typeregular (classic)regular (classic)
Camera compatibility
Canon
Nikon
Canon
Nikon
Specs
Guide number
58 /ISO 100, 105 mm/
42 /ISO 100, 105 mm/
Reload time4 с3 с
Number of impulses
1500 /minimum 100/
1500 /minimum 100/
Pulse duration1/200 - 1/20000 c1/500 - 1/20000 c
TTLTTLTTL
Power management++
Rotary head
Head anglevertical - 90 degrees, horizontal - 270 degreesvertical - 90 degrees, horizontal - 270 degrees
Features
Features
autofocus illumination
slave mode
Stroboscope
autofocus illumination
slave mode
Stroboscope
Wireless control++
Power supply
Power source4xAA4xAA
General
Screen
Screen backlight
Dimensions200х75х57 mm200х75х57 mm
Weight365 g365 g
Added to E-Catalogoctober 2017july 2013

Guide number

The guide number is the main characteristic that describes the power of the light pulse of the flash. It is described as the maximum distance (in metres) at which, at ISO 100 and f/1 lens speed (aperture 1), a flash is able to illuminate an "average" subject sufficiently for a normal exposure; in other words, at what distance from the flash it will be possible to normally shoot the scene at the specified ISO and aperture.

There are formulas by which, knowing the guide number, you can derive the practical shooting distance for each specific value of sensitivity and aperture. The simplest formula used to calculate the distance at ISO 100 is: S=N/f, where S is the distance, N is the guide number, f is the aperture value. For example, for a guide number of 56 and an f/2.8 lens, this distance would be 56/2.8 = 20 m. Increasing or decreasing sensitivity by a factor of 2 would increase or decrease the specified distance by approximately 1.4 times, respectively. If you need to calculate the distance as accurately as possible, you should refer to more detailed formulas that can be found in specialized sources.

Separately, it is worth noting that the leading numbers of flashes, usually, are indicated by manufacturers for specific focal lengths of lenses. This is due to the fact that the shorter the focal length and, accordingly, the wider the viewing angle, the more light is needed to illuminate the scene being shot and the more powerful the flash pulse should b...e (at the same distance). Therefore, when choosing by the guide number, it makes sense to pay attention to the focal length indicated by the manufacturer and select a model with a power reserve — especially since guide numbers are often prescribed for rather “long-range” lenses (with a focal length of about 80-100 mm in equiv. 35 mm).

Reload time

The time it takes the flash or generator (for studio flashes) to prepare for the next flash. The smaller it is, the better. This parameter is especially important for continuous shooting, when the interval between frames is small: if you often shoot in this mode, you should look for a flash with the shortest possible recycle time. Also note that the characteristics usually indicate the shortest recharge time; in some operating modes, it may be significantly more than stated.

Pulse duration

The duration of the pulse of light provided by the flash. This indicator can range from thousandths to hundred thousandths of a second; it is usually expressed as a fractional number with a unit in the numerator, such as 1/880 s. The human eye does not notice the difference, but in some shooting modes it can become critical. For example, to capture fast-moving scenes (such as splashing water, the flight of an insect, or the movement of machine parts) you need to choose a flash with the shortest flash duration possible — otherwise the image may be blurry.

The longest pulse duration in modern photoflashes is about 1/800 s; the minimum value can reach 1/30,000 s or even less.
Meike Speedlite MK-950 II often compared
Meike Speedlite MK-950 often compared