Minolta X-7A - TECHNICAL Details

34
TECHNICAL DETAILS
Type:Quartz/electronically governed 35mm single-lens
reflex auto-exposure (AE) camera
Exposure-control modes: Aperture-priority automatic
(" AUTO") and match-LED/full-metered manual ("M")
Lens mount: Minolta 5LR bayonet (54° rotating angle);
coupling for full-aperture metering and automatic
diaphragm control with Minolta MD and Me lenses
Exposure control and functions: Low-voltage, low-
current computer circuit varies shutter speed steplessly
according to aperture set in AUTO mode, to yield
proper exposure for film speed set; auto-exposure
range : EV 1 to EV 18 (e .g., 1 sec . at f/1.4 to 1/1000
sec. at f/16) at ISO 100/21 ° with f/1.4 lens; AE lock
enabling holding meter reading for exposure at that
value
Shutter: Quartz-controlled horizontal-traverse focal-
plane type; step less speeds 1/1000 to 4 sec. set automat-
ically with selector dial at "AUTO" setting or fixed
speeds 1 to 1/1000 sec. or "S " (bulb) set manually at
detented indications ; electromagnetic shutter release
locks when voltage too low for proper operation
Metering : TTL center-weighted averaging type , by
silicon photocell mounted at rear of pentaprism
Film-speed range: ISO 12/12 ° to 3200/36 ° set by
film-speed dial that locks at 1 /3-EV increments
Mirror: Triple-coated oversize instant-return slide-up
type
Viewfinder: Eye-level fixed penta prism type showing
95% of 24 x 36mm film - frame area ; magnification : 0.9X
with 50mm standard lens focused at infinity; power :
-1 D, adjustable with accessory snap-on eyepiece lenses;
Acute Matte focusing screen with central horizontally
oriented split-image focusing spot surrounded by micro-
prism band; visible around frame : mode indication ("A"
or "M"), shutter speed scale with LED setting indication
for metered speed and manually set speed, 1-4 sec. auto-
speed indication, over-lunder-range LED indicators , "S"
setting indication, flash-ready signal, automatic battery
check; display and metering activated by normal finger
contact, or slight pressing of operating button or by
engaging AE lock, continue for 15 sec . after finger
removed