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Black Opteka 28mm f/2.8 manual prime lens with vented hood for Micro Four Thirds

Opteka

Opteka 28mm f/2.8 Manual Focus Prime Lens Micro Four Thirds

SKU CH-G6BF-7EWDE

A manual-focus 28 mm f/2.8 prime for Micro Four Thirds with a 9-blade diaphragm, 6-element optical design and 49 mm filter thread

  • TypeFixed Length Lens
  • ColorBlack
  • Diameter49mm
  • Focus TypeManual Focus
  • Focal Length28 mm
  • ApertureMaximum: f/2.8 Minimum: f/22
  • Wide 50° diagonal view captures expansive scenes
  • Fast f/2.8 aperture excels in low-light conditions
  • 6 elements in 5 groups reduce optical aberrations
  • 9-blade diaphragm creates smooth background blur
  • Metal build with 49mm filter thread accepts standard filters

Wide-angle prime for Micro Four Thirds

The Opteka 28mm f/2.8 is a fixed focal length lens built for the Micro Four Thirds mount. It provides a 50-degree diagonal angle of view, equivalent to a 56mm field of view on the format. Photographers who prefer full manual control over focus and aperture will find its mechanical design suited to deliberate shooting.

Upgrade from kit zoom limitations

This prime replaces variable-aperture kit zooms that restrict low-light work and depth-of-field control. The constant f/2.8 maximum aperture gathers more light at the wide end, while the 9-blade diaphragm produces smoother background rendition. The jump is worth it when you need consistent exposure across the frame and shallower focus separation than a slow zoom allows.

Simple mount-and-shoot installation

The lens attaches directly to any Micro Four Thirds body with no electronic coupling required. Focus and aperture are adjusted via dedicated rings on the all-metal barrel. The main issue is forgetting that focus must be set by eye or focus peaking, as there is no autofocus motor. The 49mm filter thread accepts standard accessories, and the included vented hood helps reduce flare.

Highlights

  • Wide 50° diagonal view captures expansive scenes
  • Fast f/2.8 aperture excels in low-light conditions
  • 6 elements in 5 groups reduce optical aberrations
  • 9-blade diaphragm creates smooth background blur
  • Metal build with 49mm filter thread accepts standard filters

Specifications

BrandOpteka
Modelopteka115734
TypeFixed Length Lens
ColorBlack
Diameter49mm
Focus TypeManual Focus
Focal Length28 mm
ApertureMaximum: f/2.8 Minimum: f/22
Camera MountMicro Four Thirds
Lens Construction6 elements in 5 groups
Filter thread (Diameter)49 mm
Image StabilizationNo
AutofocusNo
Dimensions2 x 1.5 x 2 in.
Weight4.8 oz.

Questions about this item

What filter thread diameter does the Opteka 28mm f/2.8 use?

The lens has a 49 mm filter thread, so standard 49 mm screw-in filters, hoods or caps will attach directly.

How do you set the aperture on this fully manual Micro Four Thirds lens?

Turn the clickless aperture ring on the barrel from f/2.8 to f/22; the camera body will not control aperture, so you must set it by hand before each shot.

What routine care will the Opteka 28mm f/2.8 need over time?

Clean the front and rear glass with the supplied kit when dust or smudges appear, check the aperture blades move freely, and store the lens with caps on to protect the HD anti-reflection coating.

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