This is particularly key with flash exposures, because flash illumination falls off quite strongly as the subject gets further from the camera. Older models such as the SB-80DX, SB-28DX, SB-28, SB-27, and SB-22S will only offer non-TTL (non through-the-lens metering) auto or manual flash modes.[>Īs noted above, the "3D" aspect of the Nikon metering system is that it uses subject distance information from the lens (only available with G or D-type lenses) to guide its exposure decisions. Current Nikon flashes (the SB-900, SB-800, SB-700, SB-600 and SB-400) will give you full capability in all exposure modes. Different Nikon speedlights offer different features when used on the D5100 as well. The full range of flash sync modes remains available for compatible flash units, but third-party models may not support all modes. The hot shoe accommodates Nikon accessory flash units, as well as a wide range of third party flashes. Nikon does however sell a sync terminal adapter (Part Number AS-15) that converts the hot shoe to a sync terminal. Divide the guide number by your lens' aperture setting to produce the actual range in feet.) Guide numbers at ISO 200 are 17 meters (56 feet) in auto mode, and 18 meters (59 feet) in manual mode.Īlso included on the Nikon D5100 is an external flash hot shoe, just behind the pop-up flash compartment, but there's no separate PC-style sync terminal as found on professional models. (Novices should note that 39 feet is the guide number, not the range. The greater range in manual mode is because it doesn't have to expend energy on the metering pre-flash. The Nikon D5100's internal flash is reasonably powerful, with a guide number of 12 meters or 39 feet at ISO 100 in auto mode, extending slightly to 13 meters (43 feet) in manual mode. There is no support for external flash units that are FP-capable either, so it seems that 1/200 second is the fastest shutter speed you'll be able to use with the flash, regardless of mode or flash source.īesides the main flash modes listed above, the Nikon D5100's onboard speedlight can also be used in manual mode, in which you can set its power output to fixed levels of full, 1/2, 1/4, 1/8, 1/16, and 1/32 power. Basically, this means that the on-board flash can't sync at shutter speeds greater than 1/200 second. The Nikon D5100 has a 1/200 second maximum X-Sync speed, and its built-in flash is not FP High-Speed Sync-capable. (Flash exposure can also be adjusted via the Shooting Display and Multi-Controller arrow keys, which some users may find more straightforward.) ![]() A Manual flash exposure mode is available via Custom Settings Menu option e:1.įlash exposure can be set over a range of -3 to +1 EV by holding the Flash and Exposure Compensation buttons down simultaneously, while rotating the Command Dial. Finally, Rear-Curtain fires the flash at the end of the exposure, producing light trails that appear to follow (rather than precede) moving subjects. Red-Eye Reduction mode fires the (very bright) AF-assist light before the main flash exposure, to reduce the Red-Eye Effect in shots of people. ![]() (This reduces the harsh effect of nighttime flash shots, allowing more of the ambient illumination into the picture.) Slow Sync mode works with shutter speeds as slow as 30 seconds to preserve color in night shots. Slow Sync combines the flash with a slower shutter speed for night portraits. The full list of flash modes includes Auto, Auto+Red-Eye Reduction, Auto+Slow Sync, Auto+Slow Sync+Red-Eye Reduction, Fill, Red-Eye Reduction, Slow Sync, Slow Sync+Red-Eye Reduction, Rear Curtain, and Rear Curtain+Slow Sync. The flash modes available vary depending on the setting of the mode dial, with some of the more automated/programmed modes restricting your choices. You can still use the Nikon D5100 with a Nikon SB-700, SB-800 or SB-900 flash or SU-800 wireless Speedlight Commander to control multiple remote flash units, but the built-in flash doesn't have that ability on its own. Like 2008's Nikon D60, flash capability is an area where the Nikon D5100 shed some substantial capability relative to the D90 and higher models, though, in that its built-in flash can't serve as a Commander in Nikon's Wireless Lighting System. This advanced exposure metering system takes advantage of subject-distance information relayed by the lens to compute more accurate flash exposures than more conventional systems based on reflected light alone. Flash photography has been a particular strength of Nikon SLRs for some time now, and the D5100 retains the company's implementation of Nikon's 3D Color Matrix II metering for flash exposures.
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