The Camera

Parallx- The effect whereby the position or direction of an object appears to differ when viewed from different positions.

Pentax- A type of lens that is extremely thin and light. It has used the highest index of refraction, at 1.67.

Pentaprism- A pentaprism is a five-sided reflecting prism used to deviate a beam of light by 90°. The beam reflects inside the prism twice.

Pellicle- A thin skin, cuticle, membrane, or film.

Aperture- An opening, hole, or gap.

Shutter- Each of a pair of hinged panels fixed inside or outside a window that can be closed for security or privacy or to keep out light.

Exposure- The state of being exposed to contact with something.

Depth Of Field- The distance between the nearest and the furthest objects that give an image judged to be in focus in a camera.

F-stop- In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture) of an optical system. 

Focal Length- The distance between the center of a lens or curved mirror and its focus.



  (Illustration courtesy Canon USA, with modifications © Imaging Resource)

1	Mode dial	13	EF lens mount index
2	Power switch	14	EF-S lens mount index
3	Flash button	15	Flash-sync contacts
4	Main dial	16	Hot shoe
5	Shutter button	17	Focal plane mark
6	Red-eye reduction lamp	18	Strap mount
	Self-timer lamp	19	Microphone
7	Grip	20	Terminal cover
8	Mirror	21	Lens release button
9	Contacts	22	Remote control terminal
10	Lens mount	23	Digital terminal
11	Lens lock pin	24	HDMI mini out terminal
12	Built-in flash	25	Body cap
	AF-assist beam