found at DigiDirect
The OM System M.Zuiko Digital ED 40-150MM f/4.0 PRO Lens is a high-resolution, weather sealed lens you can take anywhere.
This high-performance, compact telephoto zoom lens covers a wide range of telephoto end subjects and versatile enough to achieve close-up shooting with a maximum image magnification of 0.41x for beautifully detailed and intricate shots. No matter where you focus across the zoom range, you'll capture high resolution images with edge-to- edge sharpness. Get mind-blowing telephoto imaging power in a lens that fits in the palm of your hand. The M.Zuiko Digital ED 40-150mm f/4.0 PRO.
This lens uses the same fundamental structure as the M.Zuiko Digital ED 40-150mm f/2.8 PRO, which is well known for its high resolution, and incorporates an optical design with 15 elements in 9 groups (2 ED lenses, 1 Super ED lens, 1 HR lens and 2 aspherical lens). An effective layout of special lenses helps to thoroughly suppress chromatic aberration, which tends to occur on telephoto lenses, and delivers high-resolution imaging from the maximum aperture value across the entire zoom range and frame while maintaining a compact and lightweight form. The lens also features ZERO (Zuiko Extra-low Reflection Optical) coating, thoroughly eliminating ghosts and flares for clear depictive performance even in difficult conditions such as backlit scenes.
A retracting mechanism makes this the world's most compact, lightweight model as a fixed aperture value, 300mm equivalent (35mm equivalent) telephoto zoom lens, measuring approximately 99.4 mm long (124 mm long when in use) and weighing approximately 382 g, making it amazingly compact and lightweight. The lens was designed with a focus on ease of use when shooting and is equipped with a mechanism that makes it possible to retract and store the lens simply by turning the zoom ring. It also uses an inner zoom system that keeps the lens length the same across the entire focal length, suppressing center of gravity changes while zooming.
The OM SYSTEM M.Zuiko Digital ED 40-150MM f/4.0 PRO Lens clears the IPX3 and higher splashproof tests, far exceeding the conventional IPX1 rating, as well as dustproof tests. It also features IP53 dustproof and splashproof performance for peace of mind in even more punishing conditions. It can function in low-temperature environments down to -10°C, and pairing it with a dustproof, splashproof, and freezeproof camera body makes it possible to continue shooting in punishing environments such as rain, snow, and even dusty environments with peace of mind.
In addition to water, oil, and dust repellent performance, the fluorine coating on the front most lens is also effective in reducing friction. This means the lens can easily be cleaned with a blower or cloth when it gets dirty, allowing users to continue shooting immediately.
This model features a closest focusing distance of 70 cm across the entire zoom range, just like the M.Zuiko Digital ED 40-150mm f/2.8 PRO. At the telephoto end, close-up shooting is possible up to a maximum image magnification of 0.41x. Despite being a telephoto zoom, this lens also possesses superior close-up shooting performance for a wide range of applications. Focus Stacking3 is also supported, which captures multiple shots at different focal positions, and then automatically composites the shot. When paired with a compatible camera, this mode lets you take macro photos that are completely in focus from the front to the back