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IIncandescent
Incandescent light refers to the illumination produced from typical household light bulbs (tungsten bulbs) incorporating a heated tungsten wire filament. The light produced is “yellow” or a warmer-than-daylight white balance. Setting a camera’s white balance to Incandescent will correct for the yellow cast.
In terms of color temperature, incandescent light generally falls between 2500 and 3500 degrees Kelvin.
Color Temperature | Light Source |
1000-2000 K | Candlelight |
2500-3500 K | Tungsten Bulb (household variety) |
3000-4000 K | Sunrise/Sunset (clear sky) |
4000-5000 K | Fluorescent Lamps |
5000-5500 K | Electronic Flash |
5000-6500 K | Daylight with Clear Sky (sun overhead) |
6500-8000 K | Moderately Overcast Sky |
9000-10000 K | Shade or Heavily Overcast Sky |
- Recycling Time
- The time necessary for an electronic flash to recharge and be ready for the next picture, it often depends on the type and condition of the battery and the guide number of the flash.
- Reflected-Light Exposure Meter
- Measures light reflected from the subject. Reflected-light readings are affected by the amount of light in the scene and the subject’s reflective properties.
- Reversal Film
- Also called positive film or slide film. When exposed and processed, images appear similar to the subject in tone and color.
- RGB
- Referring to red, green and blue, the primary colors used on a computer monitor to simulate natural color.
- Rear-Curtain Sync
- Sometimes called second curtain sync, it's a technique in which the flash fires an instant before the second (rear) curtain of the camera's focal plane shutter begins to move.
- Rule of Thirds
- More a composition guideline than a rule, here's how it works: imagine the lines of a tic-tac-toe game board superimposed over the scene you're viewing in the finder. Find out more.
- Reflector
- An object or device—it can be a piece of white paper or cloth or a foil-wrapped piece of cardboard—that directs light toward or away from a subject. Often used to fill in shadows; also often used for outdoor portraits.
- Reverse Adapter
- See Macro Adapter Ring.
- Ring Light
- A type of flash or strobe in which the flash unit is ring or circular shaped. A Ring Light fits around the camera's lens and provides soft, even lighting with no shadows. Find out more.
- Retrofocus-Type (Wide-Angle) Lens
- It is a lens which has the principal point behind the rear part of the entire lens. Find out more.
- Rembrandt Lighting
- A studio lighting technique for portraits that was first characterized by the painter Rembrandt. Find out more.
- Removable Memory
- A solid-state removable memory card for a digital camera that comes in a variety of size and capacity configurations. The larger the card's capacity, the more digital pictures it can store.
- Rangefinder
- A type of camera that features a focusing method involving the display in the viewfinder of two separate images of the subject. Sharp focus is achieved when the focusing mechanism is turned and the images coincide.
- Right-Angle Viewing Attachment
- An accessory for the viewfinder eyepiece that enables viewing from a right angle. Useful for copystand work and when the camera is inconveniently positioned low, near the ground, or at an angle which makes normal viewing impossible. Find out more.
- Resolving Power (Resolution)
- The ability of a lens or photographic material to reproduce small details. One of the measurements of lens performance.
- Red-Eye
- The phenomenon in which the center portions of a subject's eyes appear as red spots in flash pictures.
- Relative Illumination
- Illumination around the periphery of the image field. Used as a comparison of the brightness between the center and the periphery.
- RAM
- Random Access Memory. Short-term computer memory, it's where the computer's CPU stores software programs and data that are currently being used.
- Reflex Lens
- A reflex lens employs a combination of mirrors and lens elements to "fold" the light path, permitting a reduction in overall lens length and weight compared with conventional lenses of equivalent focal lengths.
- Red-Eye Reduction (Speedlight mode)
- Nikon Speedlight mode. Available with cameras having red-eye reduction with slow-sync.
- Rim Lighting
- Rim lighting is achieved by placing a light behind the subject, so the rim or outline of the subject's body is illuminated.
- Reflex Mirror
- The mirror that reflects the light passing through the lens upward to the prism for viewing.
- Rear Focusing System
- A system in which only the rear lens group moves during focusing, thus eliminating changes in the physical length of the lens during focusing and enabling faster focusing. Such lenses are designated with RF on the lens barrel.
- Reproduction Ratio
- Specifically the size of the image recorded on film divided by the actual size of the subject.
- Raster
- Refers to images made up of individual dots, each having a defined value that identifies its size, color and place within the image.
- Rear Focus
- Refers to the focused area behind the picture's subject.
- Reciprocity Failure
- A phenomenon that occurs when film is exposed under conditions that are not within its practical brightness range.
- Retractable Lens Barrel
- Select 1 NIKKOR lenses in the Nikon 1 camera system are designed specifically with a retractable lens barrel, for more compact storage when the lens is not being used. Find out more.
- Release-Priority AF
- An autofocus mode in which the shutter can be released anytime, even if the subject is not in focus. Recommended in fast-moving situations when you do not want to miss any of the action.
- RAID Array
- Redundant Array of Independent Disks. Find out more.
- RAW
- An Image format in which the data comes directly from the camera's CCD, unmodified, with no in-camera processing performed.
- Repeating Flash
- A feature available in some flash units that fires the flash many times during a brief exposure.