RMA Electronics, Inc. has been in business since 1986 – primarily specializing in distribution of industrial video and high end video security products.  We sell over 10,000 individual units of machine vision and CCTV lenses each year – with our main visibility through  Our current customers are located in many countries throughout the world – comprising of single end-users, very large OEMs, and everyone in between.  Over the past few years, demand has substantially increased in use of various C-Mount type lenses in cinematography and professional video / photography.

Many of these video and photography customers are using Micro Four Thirds mount (M4/3 Mount) cameras, which require the use of a special adapter for using C-Mount lenses.  Some of these C-Mount lenses may also also require a minor modification to fit the adapter correctly (although the C-Mount lens models listed on the website do not require any such modification.)

Working in close collaboration with Kowa to help bring to market and meet this increasing demand for Micro Four Thirds Mount, RMA Electronics, Inc. is proud to offer this special series of fixed focal manual focus and manual iris M4/3 Mount lenses – PROMINAR series.

The current Kowa PROMINAR series prime lenses are offered in three focal lengths: 8.5mm (super wide angle), 12mm (wide angle), and 25mm (standard angle).  These lenses represent the next-generation of crystal clear optics producing ultra HD resolution by applying high precision aspherical lens elements.  Particularly for the 8.5mm model, this design allows for very minimal optical distortion even though it projects a super wide angle of view.

As Kowa’s current largest distributor for their Industrial Lens Division in the U.S., we know the high quality of optics they offer, but we welcome you to also see what some independent third-party reviewers have to say thus far about the Kowa PROMINAR prime lenses.

One Comment on “About

Tim Giordano
December 4, 2015 at 9:19 pm


After finally emailing Kowa America, I was able to find a retailer in the US for the Prominar Lenses. Thank you! Otherwise, I would had to buy it on eBay from Japan.

I’m in a quandary as there are not a lot of reviews on the Kowa 8.5mm f/2.8, other than the ones I’ve seen that you have posted. I am an amateur photographer. I do all of my shooting with prime lenses. I do own the Olympus OM-D EM1 camera, which I love.

I’m looking at the Kowa 8.5mm f/2.8, the Olympus Pro 7-14mm f/2.8, and the Voigtlander 10.5mm f/0.95. I am not worried about auto focusing, especially at the ultra wide angle of these lenses. There are cost differences between each of these, but that is not my deciding factor. The deciding factor is trying to figure out which is the best lens for wide angle shooting.

My question for you is, that I would like to order the Kowa; however, I do not know your return policy if I am not satisfied with the lens. I know that if I was unsatisfied with either of the other 2 options, I had 30 days for return for full refund.

Thanks in advance for any insight you can provide.

Tim Giordano


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