Data sheet: Mamiya E 135 mm f/3.5 (Z/E mount)

Pekka Buttler, 07/2024

Pictured: Mamiya-Sekor E 135 mm f/3.5


The table below summarizes the lens’ key specifications (measurements based on pictured, last version of the lens):

Brand:Mamiya-SekorLens nameE 1:3.5 f=135mm
Focal length(s)1135 mmAngle-of-view218 °
Maximum Aperturef/3.5In Production1980-1984
Lens mountMamiya Z/ESubfamily (if applicable)––
Length382,9 mmDiameter462,1 mm
Filter ring diameter49 mmWeight280 grams
Lens element count4Lens group count4
Aperture blades (S/R/C)56 SFocus throw220 °
Minimum focusing distance1,5 mMaximum magnification1:9,0
Has manual aperture ringNOHas Manual focus ringYES

Further notes:

• In 1980 Mamiya introduced the Z line of cameras and together with 7 Mamiya Sekor-E lenses, including this one. Early in 1981 Mamiya introduced 5 more Mamiya-Sekor E lenses.
• In September of 1981, Mamiya introduced the top-of-the-line ZE-X camera, and started updating some existing Mamiya-Sekor E lenses to Mamiya-Sekor EF lenses. This lens however was never ‘updated’ from E to EF. Instead it remained in production for the entire, deplorably short life of the Mamiya Z/E system.
• With its 49 mm filter thread and compact size, this lens is a typical example of late manual era medium tele lens.
• The lens sports a built-in, extendable lens hood.
• As a quirk that was typical for the Mamiya Z system, the lens does have an aperture ring, but that ring has no function on the lens itself (Mamiya Z lenses aperture rings communicated the chosen aperture to the camera, which in turn did the closing down). This has implications on adaptability (read more below).


Only one version of this lens was ever made. Also, this lens does not have a direct predecessor in another system, as Mamiya typically did not offer a 135 mm f/3.5 lens6.

History of Mamiya Z/E lenses

Please see the JAPB article on all (7) Mamiya SLR lens mounts to understand the role of the Mamiya Z/E mount.


n.B! The following applies to all Mamiya Z/E mount lenses.

This lens cannot be used natively on any current SLR or dSLRs. To use it in its native environment, you will need a Mamiya Z/E-mount film body – a ZE, ZE-2, ZE-X or ZM. While the Mamiya Z/E system remained in production for only 4 years (and was not a mega-hit), these bodies are relatively easy to find.

While the lens sports electronic contacts, these are not needed to facilitate critical functionality. However, as the aperture ring of Mamiya Z/E lenses is a dummy ring (it does not manipulate the lens’ aperture in any way – it instead communicates the aperture to the camera body, which in turn manipulates the lens’ aperture lever), adjusting aperture is a function that has to be taken care of by the adapter.

Therefore, should you aim to adapt this lens to a mirrorless camera you will need an adapter that facilitates adjusting the lens’ aperture. Luckily, every Mamiya Z/E adapter I’ve seen does offer such a functionality. However, due toMamiya Z/E lenses not being among the most numerously manufactured, special adapters (helicoid adapters, tilt/shift adapter and speed boosters) are currently unavailable.

Using Mamiya Z/E lenses on dSLRs is also possible. However, due to that the, difference in flange focal distances between the Mamiya Z/E lens and the dSLR mount (between +1,5 mm and negative 1 mm) invariably does not allow sufficient space for an adapter that allows aperture modification, these adapters are always adapters with added optics to achieve infinity focus.


  1. Focal length is (unless stated otherwise) given in absolute terms, and not in Full-frame equivalent. For an understanding of whether the lens is wide/tele, see ‘Angle-of-view’. ↩︎
  2. Picture angle is given in degrees (based on manufacturers’ specs) and concerns the diagonal picture angle. Rule of thumb:
    > 90 ° ==> Ultra-wide-angle
    70–90 ° ==> Wide-angle
    50–70 ° ==> Moderate wide-angle
    40–50 ° ==> ‘Standard’ or ‘normal’ lens
    20–40 ° ==> Short tele lens
    10-20 ° ==> Tele lens
    5-10 ° ==> Long tele lens
    < 5 ° ==> Ultra-tele lens ↩︎
  3. Length is given from the mount flange to the front of lens at infinity. ↩︎
  4. Diameter excludes protrusions such as rabbit ears or stop-down levers. ↩︎
  5. S=straight; R=rounded; C=(almost)circular at all apertures. ↩︎
  6. Mamiya clearly preferred 135 mm f/2.8 lenses on its systems (NC/CS, M42/SX, XTL/ES), and the previous 135/3.5 in Mamiya’s lens lineup dates all the way back to 1966. ↩︎

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