Camera Lenses for Pentax K
All modern Pentax digital cameras use the tried and trusted K Mount bayonet system, designed to fit onto Pentax camera bodies. This system was introduced in 1975 to replace the previous 49mm screw mount.
The K Mount bayonet lens system is very useful as it allows you to quickly and easily take off and fit your lenses, even with one hand. You need never miss a great shot when you use a bayonet system. The Pentax K mount system has proven as reliable as the bayonet systems on Nikon and Canon cameras and Pentax have not changed it significantly over time.
K Mount variation
The K Mount system itself has gradually increased in complexity since the beginning, meaning that all K mount lenses should physically fit onto all Pentax K Mount camera bodies. However, depending on the camera body age, not all types of K Mount lenses will provide the full functionality of auto-focus, metering and other useful features.
It's therefore important to check before you buy that any older Pentax K Mount lens you're considering will deliver full functions with the model of Pentax K Mount camera that you intend fitting it to. Or that if you have an older Pentax camera, you are not paying more for a modern lens that will not be able to deliver all its features.
K Mount lens types are all identified by the letter that comes after the K. The letter K on its own means it is an original K Mount lens, while letters after such as F, A and AF2 tell you the exact kind of newer lens type they are. Simply check your camera's user manual to see which lenses will work best for you.
While both Pentax film cameras and digital Pentax cameras use the K Mount, Pentax K mount lenses cannot be successfully fitted to older 49mm Pentax bodies or vice-versa. Users of non - Pentax camera bodies can easily buy adapters to fit K Mount lenses to their cameras, but may lose some of the lens' advanced features.
The range of K fitting lenses is extremely large and you can choose from Pentax's own brand, as well as from manufacturers such as Tamron and Sigma.
A good selection of lenses to own for all occasions might consist of a 50mm prime lens with a large aperture for low-light work, such as the Pentax 50mm f 1.8. A wide angle to medium telephoto zoom, such as the Tamron SP AF 10-24mm for general use and a powerful telephoto zoom like the Sigma 50-500mm for sports and wildlife photography.