Review on 🔍 Ultimate Zoom Power: Bower SLY30063M43 300mm f/6.3 Telephoto Lens for Olympus & Panasonic Micro 4/3 Cameras by Matt Welch

This lens can take good pictures, but it takes a little effort and enough light. I use it with Olympus OM-D E-M10 III. IBIS Oly and the zoom functions are very helpful to get good results. The lens only supports manual focus and the depth of field is very shallow. The entire focus range is covered with about 1/3 turn of the focus ring, which feels smooth and comfortable, but that means very small adjustments have a significant impact. The zoom function of a camera is usually necessary for correct focusing. As long as you have enough time, you can focus, but moving objects like flying birds or sports will be difficult to catch. Autofocus speeds up usage but costs more. A fixed aperture of f/6.3 is not that important. If you want a lens with a long focal length, you have to deal with the disadvantages. A faster aperture gives a shallower depth of field, which is already fairly shallow. Slower apertures require longer exposure times or a higher ISO, which is already close to the limit of what you want. With IBIS I can get good pictures of perched birds in daylight with a shutter speed of 1/100-1/400s and a reasonable ISO. Physically, the lens feels solid, compact and relatively light. It's small enough to leave on my desk attached to my camera so I can easily pick it up if I see something outside the window. Remember that the compactness and simplicity is due to the design of the reflex mirror, which inherently gives a ring shape to the bokeh. It's not very pretty, but I accept the compromise. I like the range and overall size. For the 80€ I paid I am very satisfied. From what I've seen, this lens is identical to the Samyang and Rokinon 300/6.3 lenses.