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Olympus mZD 300mm f/4 PRO lens

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Dual IS - optical IS synchronising with sensor-based IS to give unprecedented 5-6EV effectiveness

Video shot with the 300mm plus MC14 to show how amazing the IS is at 840mm field of view!


The Olympus 300mm f/4 compared to the Canon and Nikon 300mm f/2.8 - far smaller but it is 1 stop smaller but the field of view is actually 600mm.

That's one reason why Micro Four Thirds is far more fun and less burden!

It will be interesting to see how well the Olympus 300mm f/4 Pro lens competes with a Canon 7D II with Canon EF 400mm f/4L IS lens for birding - the Olympus will probably have faster AF for static subjects, face recognition AF, better image quality edge-to-edge, perhaps better IS, will be far less heavy and less expensive but maybe the Canon will do better C-AF tracking of birds?


Compared with APS-C dSLR and 400mm lens - image courtesy of via


  • finally became available in March 2016
  • equivalent fov to a 600mm f/4 lens on a full frame dSLR
  • similar size and weight to the pro full frame dSLR 300mm f/4 iS lenses such as Canon EF 300mm f/4 IS L lens but instead of only 2 EV image stabiliser the Olympus gives 6-7.5 stops of 5-axis dual IS, closer focus with much better macro capability, and much faster and more silent C-AF, less flare, plus it is likely to be sharper as it needs to operate at a 2x crop factor level giving 600mm field of view, and sharper again when used with a 1.4x teleconverter when compared with the Canon 300mm with 1.4x TC.
  • if you are shooting action in low light, an f/2.8 lens with a larger sensor for better high ISO performance may be your better option, but that means much more money, weight and size.


  • 300mm f/4 = 600mm in full frame terms giving diagonal field of view of 4.1° (2.3° x 3.4°)
  • weathersealed with 11 separate hermetic seals
  • 5-6EV optical image stabiliser and dual IS / sync IS compatible
  • “highest resolution” Olympus lens ever made
  • fast, silent AF (completely silent shooting when used in electronic shutter mode)
  • face detection AF with compatible cameras
  • Zero and Z nano coating
  • Manual Focus Clutch mechanism
  • 17 elements in 10 groups
  • 9 diaphragm blades
  • close focus 1.4m giving 0.48x macro in 35mm terms
  • 3 position focus limiter: 1.4-4m, 4m to infinity and full range
  • configurable lens function button
  • 77mm filter
  • 93mm x 227mm
  • 1270g (27lbs)
  • compatible with Olympus mZD MC-14 1.4x teleconverter to give 420mm f/5.6 (840mm telephoto reach in full frame terms)
  • compatible with Olympus mZD MC-20 2x teleconverter to give 600mm f/8 (1200mm telephoto reach and almost 1:1 macro in full frame terms)
  • $US2499
  • you may wish to purchase a more sturdy case such as:
    • Canon LZ1326 Lens Case designed for the Canon 70-200mm f/2.8

my blog posts

reviews and previews

Using the dot sight bracket (E-6672) of Etsumi, and equipped with a dot sight EE-1 with binocular vision

Image courtesy of

Using the EE-1 dot sight

photo/olympusmzd300f4.txt · Last modified: 2020/08/04 19:34 by gary1

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