asahi-pentax-6x7-ttl-prism-001.jpg
asahi-pentax-6x7-ttl-prism-001.jpg

Asahi Pentax 6x7 TTL Prism

£255.00

Asahi Pentax ELF prism : EXE++ (non metered, new closed cell foam light seals)
Asahi Pentax User Manual

Exquisite condition, very slight signs of careful light use

The Asahi Pentax 6x7 TTL Prism is an interchangeable viewfinder offering center-weighted average metering (CdS in early, SPD in later models) for the classic 6x7 SLR, featuring EV 2.5-19 range (with 105mm lens), ISO 12-3200 sensitivity, 100% coverage, and requiring a 4LR44/PX28 battery, with its shutter/aperture needles aligning for exposure, and allowing shutter speed adjustments directly on the prism dial

Asahi Pentax ELF prism : EXE++ (non metered, new closed cell foam light seals)
Asahi Pentax User Manual

Exquisite condition, very slight signs of careful light use

The Asahi Pentax 6x7 TTL Prism is an interchangeable viewfinder offering center-weighted average metering (CdS in early, SPD in later models) for the classic 6x7 SLR, featuring EV 2.5-19 range (with 105mm lens), ISO 12-3200 sensitivity, 100% coverage, and requiring a 4LR44/PX28 battery, with its shutter/aperture needles aligning for exposure, and allowing shutter speed adjustments directly on the prism dial

  • Asahi Pentax 6x7 body : MINT- (new closed cell foam light seals)
    Asahi Pentax 6x7 Micro-Prism Focus Screen : MINT-
    Asahi Pentax 6x7 ELF: MINT-

    Exquisite condition, very slight signs of careful light use.
    Easily the best in UK

    UK Grading Standard
    All items are mechanically and optically MINT: Working flawlessly like new.
    Cosmetics are graded as follows:
    MINT  = Like new
    MINT- = Exceptional condition, invisible signs of use
    EXE++ = Exquisite condition, very slight signs of careful light use
    EXE = Excellent condition, signs of light careful use

  • Optics are MINT, clean, clear, crisp and super sharp
    No haze
    No fog
    No fungus
    No separation
    No scratches
    No wipe marks

  • Official Asahi Pentax service with 6mths warranty
    All factory tolerances meticulously checked.
    Mechanically MINT
    Film tested with TTL and SMC Takumar 6x7 105mm lens.
    Shutter speeds spot on.
    Frame spacing even (wind on and counter mechanism consistent as designed).
    Exposures even across the frame (shutter curtain travel consistent as designed).

  • Key Specifications & Features:

    • Metering Type: TTL (Through-The-Lens) Center-Weighted Average Metering using Cadmium Sulfide (CdS) or Silicon Photodiode (SPD) sensors.

    • Metering Range: EV 2.5 to 19 (with a 105mm f/2.5 lens).

    • ISO Range: 12 to 3200.

    • Viewfinder Coverage: 100%.

    • Diopter: -1 (slightly reduces image size).

    • Battery: One 4LR44 or PX28 (6V) battery, powering both the meter and the camera's electronically controlled shutter.

    • Controls: Shutter speed dial on the prism, meter on/off switch (stays on for 25 sec), aperture/shutter speed needles align for exposure.

    • Lens Coupling: Requires SMC lenses in automatic mode; uses a coupling pin/chain system.

    • Markings: "Asahi Pentax" on the front; found on 6x7, 67, and 67 II bodies. 

    How it Works:

    1. Attachment: Mount the prism before the lens to engage the coupling pin for automatic metering.

    2. Activation: Flip the switch down (towards orange mark) to turn the meter on.

    3. Exposure: Adjust shutter speed or aperture until the needle in the viewfinder aligns with the central index mark.

    4. Battery: A low battery (or no battery) can lock the mirror; a new battery and reset are needed. 

  • Standard 6 months Warranty

    Extended Warranty :
    1yr £50
    2yrs £75
    3yrs £100

  • The dispatch time is 5-7 days
    Free UK postage is with Royal Mail Special Delivery
    International shipping price depends on country. It is tracked and signed and average cost is £38
    You may collect in person if required but message us before purchase
    Contact details are at 'Contact Us' page.