Products You've Viewed
We’ll keep track of the products you view here.
Articles You've Viewed
We'll track the last 7 articles you've viewed so you can quickly return to them.

MMaximum Aperture

The maximum diameter of the lens opening is referred to as its maximum aperture or minimum f-number. The minimum f-number is the smallest f-number that can be selected with the lens. The maximum aperture varies from lens to lens and is included in the lens model name.

  1. #
  2. A
  3. B
  4. C
  5. D
  6. E
  7. F
  8. G
  9. H
  10. I
  11. J
  12. K
  13. L
  14. M
  15. N
  16. O
  17. P
  18. Q
  19. R
  20. S
  21. T
  22. U
  23. V
  24. W
  25. X
  26. Y
  27. Z
Guide Number
Indicates the power of a flash in relation to ISO film speed.
Grayscale
A term used to describe an image that contains multiple shades of gray, as well as black and white. Often used in imaging programs as a synonym for black-and-white.
Graininess
A term particular to film, it refers to the appearance of grain (the structure of a film's coating or emulsion) in a print, transparency or negative.
GN Mode on Nikon Speedlights
With distance-priority manual flash operation the guide number is automatically determined by the Speedlight according to the distance value and aperture set.
Gigabyte
A gigabyte (gb) is a unit of information equal to 1,024 megabytes or approximately 1,000,000,000 bytes.
Ghost Image or Ghosting
A double image that results from using flash in relatively bright light at a low shutter speed. The two images, one from the ambient light and a second from the flash, do not perfectly coincide.
Gelatin Filter
A color filter made of gelatin. Since gelatin can be dyed with a wide range of materials, filters can be made with a variety of colors for various effects. Find out more.
Groups of Pictures
MPEG formats use three types of compressed frames, organized in a group of pictures, or GOP, to achieve interframe compression. Find out more.
Gamma
Gamma is a mathematical term which is used to describes a skew in the middle tones of an image. Find out more.
G-Type NIKKOR Lens
G-type NIKKOR lenses have no aperture control ring and are intended for use on Nikon D-SLRs that allow the lens aperture to be adjusted via the camera's command dial. Find out more.
GPS
Global Positioning System, in which the receiver calculates its position on the earth by timing signals received from GPS satellites.
GIF
Graphics image format. This is a raster-oriented graphic file format that allows the exchange of image files across multiple platforms.
Guide Mode
Guide Mode provides instant in-camera guidance that shows you step-by-step how to change camera settings to achieve the picture you want. Find out more.