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Rokinon Reflex 300mm f/6.3 ED UMC CS Manual Focus Lens Micro Four Thirds, Black

SKU: RK300MMFTBK MFR: 300M-MFT-BK
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Includes 2 Free Items ($60.89 Value)

SINDA8258
Sirui 58mm Lens Thread to NDH100-82 Filter Holder Adapter Ring
SINAMCCR58BR
Sirui 58mm Nano MC Circular Polarizer Filter, Brass Ring

Key Features

  • Capture stunning distant subjects with this Rokinon 300mm telephoto lens.
  • Achieve unique bokeh with the f/6.3 aperture, great for creative photography.
  • Compact and lightweight design makes this 300mm lens ideal for travel photography.
  • Manual focus lens allows precise control for detailed, artistic compositions.
  • Micro Four Thirds mount offers compatibility with Olympus and Panasonic cameras.
  • Explore nature photography with the reach of this Rokinon 300mm reflex lens.
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Special Order?Estimated to Ship: 08/23/2025
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Q&A

Questions & Answers

Reviews about this item

Review Summary

2019-02-06T00:41:18

Rated 2 out of 5

Razor thin focus

Given this is a manual lens, focal depth is extremely important. Unfortunately, when taking pictures of deer standing within 3 feet of one another, one was in focus and the other out of focus. When attempting astro photos from a tripod, I could not get the moon or stars to properly focus either.

Christopher A.

2017-03-08T11:41:57

Rated 4 out of 5

good construction, strong vignetting and limited sharpness

as stated in the title this lens represented a point on the compromise curve: very low cost, good physical construction, mediocre image quality. When shooting against any light background the vignetting is strong enough to make post processing a hassle. Sharpness in the dead center is also visibly worse than premium super telephoto lens. The other problem is the sheer difficulty of getting a good focus. I was trying to put it on infinity when shooting the moon, and it felt like that the focus ring needs to be placed with very high precision. I needed to do a 'focus bracketing'. Because of the low cost, I have to give this 4 stars rather a lower score reflecting its image quality. before you buy, check out all the reviews on the internet and think about your priority.

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Rokinon 300mm f/6.3 Specifications

General

General

Jump to...
  • Brand

    Rokinon

  • Lens Series

    None

  • Color

    Black

  • Lens Type

    Telephoto

  • Lens Mount

    Micro Four Thirds

  • Format Compatibility

    Micro Four Thirds

  • Focus Type

    Manual Focus

  • Closest Focus Distance

    2.95' / 90 cm

  • Focal Length

    300mm

  • Angle Of View

    5.5

  • 35mm Equivalent Focal Length

    600mm

  • Maximum Aperture

    f/6.3

  • Minimum Aperture

    f/6.3

  • Maximum Magnification

    Not specified by manufacturer

  • Filter Size

    58mm

Construction

Jump to...
  • Lens Elements / Groups

    9 Elements / 9 Groups

  • Diaphragm Blades

    None

  • Dimensions Diameter x Length

    2.6 x 2.9" (65 x 74 mm)

  • Weight

    11.2 oz / 318 g

Features

Jump to...
  • Image Stabilization

    None

  • UPC Code

    084438761474

4 Accessories for Rokinon Reflex 300mm f/6.3 ED UMC CS Manual Focus Lens Micro Four Thirds, Black

  • All Accessories (4)
  • Cleaning Accessories (4)

Designed For Use With:

  • Olympus E-M5
  • Olympus E-M5 Mark II
  • Panasonic G9
  • Panasonic GH6
  • Olympus E-M1 Mark II
  • Olympus E-M1 Mark III
  • Olympus E-M10 Mark II
  • Olympus E-M10 Mark III
  • Olympus E-M10 Mark IV
  • Olympus E-M1X
  • Olympus E-M5 Mark III
  • Olympus E-PL10
  • Olympus Pen F
  • Panasonic G100
  • Panasonic G100D
  • Panasonic G7
  • Panasonic G85
  • Panasonic G95
  • Panasonic GH4
  • Panasonic GH5
  • Panasonic GH5 II
  • Panasonic GH5s
  • Panasonic GM5
  • Panasonic GX85
  • Panasonic GX9
  • Panasonic Lumix GH7
  • Olympus E-M1
  • Olympus E-M10
  • Olympus E-P1
  • Olympus E-P2
  • Olympus E-P3
  • Olympus E-P5
  • Olympus E-PL1
  • Olympus E-PL2
  • Olympus E-PL3
  • Olympus E-PL5
  • Olympus E-PL6
  • Olympus E-PL7
  • Olympus E-PL8
  • Olympus E-PL9
  • Olympus E-PM2
  • Panasonic DMC-GF3
  • Panasonic G1
  • Panasonic G10
  • Panasonic G2
  • Panasonic G3
  • Panasonic G6
  • Panasonic GF1
  • Panasonic GF2
  • Panasonic GF3
  • Panasonic GF5
  • Panasonic GF6
  • Panasonic GF7
  • Panasonic GH1
  • Panasonic GH3
  • Panasonic GM1
  • Panasonic GX1
  • Panasonic GX7
  • Panasonic GX8
  • Panasonic GX850

Need Help?

For any questions about compatibility with this product, call us at 800-223-2500 or you can email us any time.

About Rokinon 300mm f/6.3

Explore the world of long-range photography with the Rokinon Reflex 300mm f/6.3 ED UMC CS Manual Focus Lens, a high-quality, professional-grade optic designed exclusively for Micro Four Thirds mirrorless cameras. This innovative lens offers a powerful 600mm equivalent focal length, ideal for capturing distant subjects such as wildlife, sports events, and astrophotography with exceptional clarity.

Crafted with a sophisticated Cassegrain design, the Rokinon Reflex lens is remarkably compact and lightweight, making it a versatile addition to your camera bag without the bulk typically associated with traditional 300mm lenses. Its durable construction ensures that it can withstand the rigors of fieldwork while providing reliable performance.

The lens boasts a fixed f/6.3 aperture, allowing for ample light capture and depth of field control, essential for isolating subjects and achieving beautiful background blur. The manual focus mechanism of this lens affords photographers the precision and control needed to fine-tune focus to their exacting standards, as close as 2.95 feet from the subject.

Incorporating one extra-low dispersion (ED) element, the Rokinon Reflex 300mm lens effectively minimizes chromatic aberrations, ensuring your images are free from color fringing and exhibit true-to-life colors. The unique mirror construction of the lens also contributes to its ability to produce images with outstanding sharpness and contrast.

To enhance image quality further, the lens features an Ultra Multi Coating (UMC) that significantly reduces lens flare and ghosting. This advanced coating also helps to diminish surface reflections, ensuring that your photographs maintain high contrast and are free from unwanted artifacts.

Whether you're a seasoned professional or an enthusiastic amateur, the Rokinon Reflex 300mm f/6.3 ED UMC CS Manual Focus Lens for Micro Four Thirds cameras is a durable, high-quality, and innovative choice that will expand your creative horizons and bring distant scenes into clear view.

Rokinon 300mm f/6.3 Features

  • Mirror lens designed specifically for Micro Four Thirds mirrorless cameras
  • Catadioptric system with Cassegrain design helps to reduce the overall size of the lens while still providing a 35mm-equivalent focal length of 600mm
  • One extra-low dispersion element and a UMC coating are integrated into the lens construction to improve sharpness and clarity as well as enhance the overall image contrast

Warranty Information

This product has a limited warranty of 12 months.

Key Features

  • Capture stunning distant subjects with this Rokinon 300mm telephoto lens.
  • Achieve unique bokeh with the f/6.3 aperture, great for creative photography.
  • Compact and lightweight design makes this 300mm lens ideal for travel photography.
  • Manual focus lens allows precise control for detailed, artistic compositions.
  • Micro Four Thirds mount offers compatibility with Olympus and Panasonic cameras.
  • Explore nature photography with the reach of this Rokinon 300mm reflex lens.

What's in the box:

  • Rokinon Reflex 300mm f/6.3 ED UMC CS Lens
  • Front Lens Cap
  • Rear Lens Cap
  • Lens Hood
  • Lens Pouch
  • Rokinon 1 Year Limited Warranty