The smc Pentax-DA* 16-50mm F/2.8 ED AL [IF] SDM is a very successful model that allows you to take pictures in a variety of genres, be it architecture, interiors, landscapes, product photography or portraits, thanks to its range of focal lengths. A constant aperture of 2.8 throughout the focal length range from 16mm to 50mm further enhances the lens' appeal. However, a focal length of 50 mm is sometimes still not enough to take close-ups of wild animals or birds, and if you are photographing a variety of scenes while traveling, then it makes sense to buy a fast 50-135mm F / 2.8 telephoto zoom (which , which is interesting, also exists in Tokina's "incarnation" for Canon EF and Nikon F systems) or one of the Pentax portrait fixes - depending on which subjects you will dominate in the shooting process. If you, as an amateur photographer, have outgrown the whale lens and want more professional optics, then it makes sense to immediately purchase the smc Pentax-DA * 16-50mm F / 2.8 ED AL [IF] SDM, and not be content with compromise options, no matter how successful they may be. Believe me, it is better to buy a high-quality lens and enjoy all the advantages of this class of optics (great image quality, excellent build quality, dust and moisture protection, ultrasonic motor) than to purchase a budget option that you will try to sell on the secondary market for a long time. My review of the lens with sample shots from a trip to Sri Lanka: http://aflenses. Net/reviews/smc-pentax-da-16-50mm-f2-8-ed-al-if-sdm
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