The lens is both dust- and moisture-resistant, an excellent feature given that this lens will predominantly be used by wildlife and sports photographers in all kinds of conditions. The lens feels great and well-balanced in the hands, on both my E-M1X and E-M1 Mark III cameras. The zoom ring was a little slow in my opinion, but nothing you can’t get used to. The fact that the lens protrudes as much as it does when zoomed in might look a little strange to the everyday observer, but it doesn’t take long to get used to. Specs Alright that's the main bits, what you are interested in is the testing so in those 7 days I had a LOT of rain and crap conditions. So I was limited but managed to get three nice and different shoots in. So have a read and enjoy the pics, there are discussions on features, position with the 100-400 and price too later on. The optical formula features some of Olympus' best lens technology, including four Extra-low Dispersion lenses (to suppress color bleeding), and two Super High Refractive Index lenses and and two High Refractive Index lenses for edge-to-edge brightness and clarity across the full zoom range.

With a close focus distance of 1.3m across throughout the entire focal range, the lens adds a telemacro feather to its cap. The ability to combine telephoto and macro shooting makes the Olympus 100-400mm more versatile than its super tele zoom capabilities might suggest. I don't know, but I think it's possible. The sensor is moving in the camera to compensate for the motion of the camera, but a bird floating in the water is moving as well. I wonder if there are circumstances where the sensor motion combined with the motion of the subject act in such a way as to increase blur, at least at long focal lengths. As mentioned, the new Olympus 100-400mm is impressively compact and lightweight for such a long-reaching lens, making it a perfect option for active wildlife shooting while hiking, for example, or simply in other situations where you want to be mobile and flexible with your shooting options and not "tied-down" from lugging around a tripod. True-to-form, the Olympus 100-400mm is significantly more compact and lighter in weight than most other 100-400mm-style super-telephoto zoom lenses for some of the other larger-sensor camera systems.

Featuring near-silent, high-speed focusing, the dust-, splash- and freezeproof Olympus 100-400mm lens offers an extensive focal range of 200-800mm in 35mm terms. Tactile Separation of Zoom and MF rings– Tactile separation of Focus and Zoom rings on Olympus is just excellent. When you hold the camera to your eye you know exactly which ring you rotate on the barrel. Panasonic has three equally grooved rings in a row and it’s easy sometimes to grab the Zoom ring instead of Focusing one. flattening effects for shooting that is unique to a super telephoto lens. The closest focusing distance across the entire zoom range is 1.3m and the maximum image magnification is 0.57x, To do this, I used the Panasonic lens on the Olympus E-M1 III since it is not possible to separate IBIS and OIS when the lens is mounted on the G9. IS Performance: Lens IS 3 steps** According to CIPA standards. With yaw and pitch applied and focal length set to 400mm

Comparison of M.Zuiko 100-400mm/ 5.0-6.3 IS vs Panasonic 100-400mm/ 4.5-6.3 IOS (personal observations) The 100-400m lens features built-in image stabilisation worth 3 stops to help to combat camera shake, while 9 circular diaphragm blades give the aperture a rounded shape. Vignetting is also very low for a zoom lens, again suggesting that maybe a fair amount of compensation is built into the system from the start. Aperture The first of the two upcoming superzooms for 2020 release from Olympus is M.Zuiko 100-400mm/ 5.0-6.3 IS, which goes on sale in the next few days. Thanks to Olympus CZ & SK, I had the incredible opportunity to test the lens (thank you Olympus CZ & SK for the loan), and here are my first-hand observations. I would like to clarify that the lens I was loaned was a pre-production sample (fw 1.0) and the final results may differ from the actual product. If you are and will be using Olympus cameras, then the Olympus 100-400 has a few advantages, most notably that you can use it with the 1.4x and 2.0 teleconverters. This is a handling challenge, but optically the results seem to be quite good. You also can use the higher speed pro capture feature, which apparently is precluded with the Panasonic lens. The IS using both an Olympus camera and lens is also a little better, but even with the Panasonic lens the stabilization is quite good.Weatherproofing: IEC Standard publication 60529 IPX1 (applies when the lens is used with Olympus splashproof Body) / Dustproof construction Flare is effectively banished, even when really bright light sources are included in the edges of the frame. The ZERO coating clearly works extremely well. The OM System/Olympus 100-400mm f/5-6.3 IS lens is compatible with the firm’s MC-14 and MC-20 teleconverters