Here are the Instructions / Guides / Manual you may need on How to Repair / Restore / DIY / CLEAN, LUBRICATE, AND ADJUST Yashica Mat 124G Medium Format Twin Lens Reflex Camera
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“Yashica Mat 124G TLR Assembly Chart for Servicing and Repair”
Language: English and Japanese
File Type: Pdf
Number of pages: 8 pages.
File Size: 3.43 mb.
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Features of Yashica Mat 124G TLR
Type: Twin-lens reflex camera accepting either 120 412 exposures) or 220 124 exposuresl Film.
Lens: YASHINON 80 mat F3,5 lens composed of 4 elements in 3 groups.
Shutter: COPAL-SV shutter with speeds from 1 to 1/500 sec. and B. built-in self timer; MX flash synchronizer selector; shutter locking device.
Finder: YASHINON 80 mm F2.8 viewing lens; Fresnel field lens for corner to-corner brightness; 3X magnifying lens for critical focusing; eve-level sports-finder frame incorporated in the viewfinder hood.4www.butkus.org
Exposure meter: Built-in match-needle type CdS meter based on preselection of shutter speed; film speed range from ASA 25 to 400; meter switch coupled to viewfinder hood; operates on 1,3 V mercury battery.
Film advance: Crank-handle film advance with automatic film stop; simultaneously charges the shutter for the next exposure; automatic resetting exposure counter registers the number of exposed frames.
Focusing: Extra-large knob extends or retracts the front panel to secure focus on the subject; distance scale calibrated in both feet and meters (3.3 ft to infinity; 1 m to infinity).
Other features: Aperture scale from F3,5 to F32; adjustable film pressure plate usable with both 12 and 24 exposure load film; exposure load reminder window, threaded cable release socket; hinged back cover; bayonet-type filter mount accepting 30 mm filters.
Dimensions: 77 x 148 x 101 mm4www.butkus.org
Weight: 1,100 grams
The first Yashica TLR with crank advance was the Yashica-Mat, released in 1957. The earliest models are equipped with a 75-mm 3.5 Lumaxar taking lens and a 75-mm 3.2 Lumaxar viewing lens, succeeded by 80-mm lenses with the same specifications. According to some authorities (most notably Mark Hama, who formerly worked in a Yashica factory), the Lumaxar was manufactured for Yashica in West Germany; according to others, it was made in Japan by Tomioka. The lens, a four-element design said to be of the Tessar type, was later re-named Yashinon. The Yashica-Mat’s shutter speeds are marked according to the older system (1/25, 1/50 etc.) and range from B to 1/500 second. (Note: the cable release is of the “Leica nipple” style which is also used on subsequent models ).
|Pictures by Hans Marvell. (Image rights)|
The Yashicamat is basically a Rollei copy, with a few of the more expensive features left out, but the ergonometrics left in. Crank wind, combined film wind-shutter cock, Rollei bayonet 1 mount for filters. Somebody moving up from 35mm should get better pictures from a properly adjusted Yashicamat than from just about any 35mm camera (keeping in mind the limitations ot a waist-level finder, fixed f3.5 80mm lens, etc.).
The final model – the 124G – was made for many, many years. Basically it’s an all-black 124 with a few other styling variations. The “G” stands for “gold” and indicates gold plating on the meter switch contacts, which increases their reliability a little. The meter circuitry is said to have been updated in the G. CdS meter cross coupled to shutter and aperture for match-needle exposure. Rotating pressure plate for both film types: 120 film and 220.
The taking lens is a four element Yashinon 80mm / f 3.5. This lens is generally thought to be a copy of the Zeiss Tessar formula. The viewing lens is a three element Yashinon 80mm / f 2.8; the matte glass has Fresnel magnification and for better focussing, there’s a 3x loupe built in.
Flash can be used on all shutter speeds.