Collectors condition Olympus OM1n plus 50mm f1.8
System: Olympus OM System.
Code Name: MDS
Model Name: Olympus OM-1
Camera Type: 35mm Single Lens Reflex with focal plane shutter
Film Format: 24mm x 36mm
Lens Mount: Olympus OM Mount, bayonet type, rotation angle 70°, flange back 46mm, Lens release button at the side of the lens
Minimum Focusing Distance: 45cm (117.72") with all standard lenses.
Shutter: Focal plane shutter, ring mounted control, with speeds from 1 to 1 /1000 second plus B.
Shutter Release Button: Threaded in the middle to accept any JIS standard Cable release
Shutter speeds control: via Dial on the lens mount
Hot Shoe Socket: Built-in. Accessory Shoe 4 supplied for OM-1n, Accessory Shoe 1 or "Fixed" Type for original M-1 or OM-1 bodies;
Synchro Socket: As per JIS standard
Flash Contacts: FP-X with switch type contact at synchro socket, X contact at shoe: With electronic flash (X) 1 sec to 1/60 sec; with class "M" Bulbs (X) 1 sec to 1/15 sec; with Class "F" Bulbs (X) 1 sec to 1/15 sec; with focal plane Bulbs (FP) 1/60 sec to 1/1000 sec.
Viewfinder: Silvered coated Pentagonal roof prism type wide-vision finder shows 97% of actual picture field. Exposure meter needle; Charge/auto check lamp for electronic flash unit T32, T20 and T10 (OM-1n only).
Viewfinder Magnification: 0.92X at infinity with 50mm lens
Viewfinder Apparent Field of View: 23° 30' & 35°
Focusing Screens: 1-1 Microproism-matte type provided as standard screen. Interchangeable with any 13 additional screens.
Reflex Mirror: Oversize, quick return type with mirror Lock-up control. Mirror Cut out: No mirror cut out in viewfinder regardless of lens in used, from 8mm to 800mm (In the cse of full open aperture); Mirror used is highly reflective with special coating applied onto reflecting surface.
Film Loading: Easy loading (Olympus EL system) type by opening rear cover, which is hinged and provided with a "magic-Lock" (Open when film rewind knob is pulled up).
Film Advance: (Manual) Ratchet type film advance. May be advanced in one stroke or several short strokes for a total of 150° rotation, pre-advance angle 30°. Built-in prevention against double advance with double exposure override capability. (Motor Drive) With Motor Drive 1/2 or Winder 1/2 unit attached, single-frame and continuous advance at speed of 5 frames per second (at exposures above 1/500 sec., with fresh batteries and at normal temperature and humidity).
Exposure Counter: Progressive type from "S" (Start) to 36 and "E" (End). Counter automatically resets to "S" when camera back is opened.
Film Rewinding: Rewind crank with automatic resetting rewind release lever. Film rewind knob to be turned 90° towards "R" mark with a red dot. Automaticlly reset when film is to be advanced.
Metering: Via Lever on top panel, Metering ON/OFF Switch
Exposure Measurement: Two CdS (Cadmium Sulphide) cells located on either side of the eyepiece provide through -the-lens open aperture light measurement. Zero-method with needle visible in viewfinder. On-Off Switch located atop camera.
Film Speed Range: ASA 25-1600
Exposure Range: EV1.2-EV16.9 with 55mm f1.2 at ASA100; EV 2-17 (ASA 100 with F1.4 50mm lens); EV2.35 - EV17.35 withh 50mm f1.8 at ASA100.
Insufficient Light Warning: When switched in, the needle jumps down extremely beyond the lower limit of the range indicator, if light level is too low for proper metering.
Self-Timer: Lever system with rortation angle 180°. Approx. 4-12 second delay lever type; Action started via start lever hidden behind Self timer lever. It can be stopped and reset after actuation.
Camera back: Removable hinge type control by Mounting Pin. Interchangeable with Recordata Back 1/2 /3 (OM-1n) and 250 Film Back 1/2.
Tripod Socket: As per JIS standard
Battery used/Power Source (Metering): 1.35 volt mercury battery JIS H-D type; MR9 (National H_D, Toshiba H-D; Eveready or UCAR EPX625, Mallory PX625, or equivalent).
Lens Accessory Size: 49mm threaded for F1.8 and F1.4 lenses; 55mm threaded for F1.2 lens
Dimensions & Weights: Body only: 510g; Body with f/1.8 lens: 136mm x 83mm x 81mm (5.35" x 3.27" x 3.19"): 680g. (24.0 oz); f/1.4 lens: 136mm x 83mm x 89mm (5.35" x 3.27" x 3.50"): 740g. (26.1 oz); f/1.2 lens: 136mm x 83mm x 50mm (5.35" x 3.27" x 1.97"): 510g. (18.0 oz
