The Nikon FG-20 is a 35 mm film single-lens reflex (SLR) camera with interchangeable lenses. It was released in 1984 by Nippon Kogaku K. K. (now the Nikon Corporation) as the successor to the earlier EM and FG cameras. It is actually a downgrade from its most direct predecessor, the FG, lacking the FG's program auto exposure mode. It uses the same vertical-travel metal focal-plane shutter as the FG, with electronically timed speeds from 1 to 1/1000 second as well as bulb and a mechanically timed 1/90-second speed.

Nikon FG-20

Nikon FG-20 with Nikkor 50 mm f/1.8
Overview
Type	Single lens reflex
Released	1984
Lens
Lens	interchangeable lens, Nikon F-mount
Compatible lenses	Nikon F-mount lenses supporting automatic indexing (AI) with some exceptions
Sensor/medium
Film format	35 mm
Film size	36 mm × 24 mm
Film speed	ISO 25 – 3200
Film advance	manual
Focusing
Focus modes	manual
Exposure/metering
Exposure modes	Aperture priority auto exposure; manual
Exposure metering	TTL metering, EV 1 to EV 18 at ASA/ISO 100 and with 50 mm f/1.4 lens
Metering modes	center-weighted
Flash
Flash	hot shoe
Flash synchronization	1/90 s
Shutter
Shutter	electronically controlled with mechanical backup
Shutter speed range	1s – 1/1000s; M90 (mechanical 1/90s); Bulb (B)
Viewfinder
Viewfinder	fixed eye-level pentaprism
Viewfinder magnification	0.86x with 50 mm lens at infinity
Frame coverage	92%
General
Battery	two SR44 or LR44, or one CR1/3N
Optional motor drives	MD-14, MD-E
Dimensions	136 × 88 × 54 mm
Weight	440 g

The FG-20 could be considered a variant of the FG, as the differences between the two are the omission of program mode, exposure compensation dial, and TTL/OTF flash metering from the FG.