Here we go again. It is just a 300mm f4, nothing special. Just like any other 300mm f4. And the 2x crop of the M43 is like a 2x tele converter without the extra light loss. With the same distance to the subject the difference in DOF between a 600mm@F4 on full frame and a 300mm@f4 on m43 is pretty great. A 600mm@f4 is able to separate a small bird from a little bush background and that is why wildlife photographers buy this lens.

This marketing is really bad and I won't take them seriously now. My advice just get the Nikon 300mm ED AIS F4.5.

Now with OIS

The new Olympus 300mm PRO lens will be announced on January 6 at 6am London time.

Preorder at Amazon before announcement :-)

http://www.amazon.com/Olympus-M-Zuiko-Digital-300mm-Black/dp/B01950SVHY/

PR

Olympus is pleased to announce the Olympus M.ZUIKO Digital ED 300mm f4.0 IS PRO, a compact supertelephoto lens that expands the capability of the M.ZUIKO PRO series of professional, splashproof and dustproof lenses that deliver outstanding image quality under any circumstance. The M.ZUIKODigital ED 300mm f4.0 IS PRO is the first Olympus interchangeable lens with a built-in image stabilization mechanism, and when paired with the Olympus OM-D E-M1 (firmware version 4.0) or E-M5 Mark II (firmware version 2.0), in-body and in-lens image stabilization work in perfect harmony, resulting in the new 5-Axis Sync IS technology to produce the world’s most powerful image stabilization performance of up to six shutter speed steps of compensation*. The lens can also be used effectively with other camera bodies, as the in-lens stabilization mechanism alone provides four shutter speed steps of compensation.

With a length of 8.9 inches (227mm) and weight of a mere 2.8 pounds (1,270g), at one third of the size and weight of most DSLR 600mm equivalents, the M.ZUIKO Digital ED 300mm f4.0 IS PRO is designed to slip into an airplane carry-on bag or backpack and go anywhere to help users easily capture handheld images in once-challenging photo destinations. Despite its compact size, the lens is hermetically sealed in 17 places and features freezeproof performance down to 14⁰F (-10°C). Together with the same splashproof, dustproof and freezeproof performance as the OM-D E-M1 and E-M5 Mark II, this ensures you can capture high-quality images in the harshest environments.

The M.ZUIKO Digital ED 300mm f4.0 IS PRO debuts Olympus’s highest-ever resolution by combining three Super ED lenses, one Extra-High Refractive index lens and three High Refractive index lenses to reduce the color bleeding and chromatic aberrations that tend to occur on typical super telephoto lenses. In addition to Olympus’s renowned ZERO Coating (ZUIKO Extra-low Reflective Optical Coating), a brand-new lens coating technology called ZERO Coating Nano suppresses reflected light to minimize ghosts and flares for extremely sharp details of images, including car headlights. A layer of nanosized particles and a layer of air from the center to the surface of the lens achieves a refractive index similar to air and significantly reduces surface reflection.

The M.ZUIKO Digital ED 300mm f4.0 IS PRO also gets up close to explore the beautiful, minute world of telemacro photography with maximum image magnification of 0.48x (35mm equivalent), with a minimum focusing distance of 46 inches (1.15m) from the end of the lens. When combined with the M.ZUIKO Digital 1.4x Teleconverter MC-14, the user can capture all of nature’s beauty in high resolution at 840mm (35mm equivalent) and an increased image magnification of 0.67x (35mm equivalent) in a handheld compact body while maintaining the same minimum focus distance.

The OM-D’s silent mode combines with the lens’ Movie & Still Compatible mechanism for silent AF and shooting, giving the user the ability to blend into the background of any situation, whether that be the refinement of a symphony performance or the dusty plains of a lion’s hunting grounds.

The lens also features a Manual Focus Clutch mechanism that makes switching to manual focus possible by pulling the focusing ring toward you. The side of the lens barrel features a Focus Limit switch (4m to infinity, all range, 1.4 to 4m), an IS switch (On/Off), and an L-Fn button, which can all be operated without ever taking your eye off the viewfinder. The built-in sliding lens hood can be locked into place when extended, and the tripod base plate with a quick shoe compatible rail is removable.

We expected great results from this 300mm lens…but we weren't expecting them to be this good. Wide open, the lens is tack sharp across the entire frame. Looking at our blur charts, the blur characteristics are practically completely flat across the frame and extremely sharp corner-to-corner. Exceptional sharpness is maintained as you stop down, though we do see minor diffraction-related softness come into play around most around ƒ/16-ƒ/22, but it's quite minor. All said and done, the Olympus 300mm ƒ/4 Pro is fantastically sharp.

http://slrgear.com/reviews/showproduct.php?product=1840

http://www.mirrorlessons.com/2016/01/06/the-olympus-300mm-f4-pro-review/

http://www.imaging-resource.com/news/2016/01/05/its-official-the-olympus-300mm-f-4-m.zuiko-pro-is-now-a-reality

https://www.damianmcgillicuddy.com/the-new-olympus-300mm-f4

http://blog.alamany.com/2016/01/test-teleobjetivo-olympus-mzuiko-300mm-f4.html

http://pen-and-tell.blogspot.it/2016/01/300-f4-lausiges-wetter.html

http://www.mirrorlessons.com/2016/01/11/olympus-300mm-f4-pro-mc-14-sample-images/