What lenses should I buy for the pentax k 50?

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From Pentax K-50: Pentax K-50: A DSLR by Pentax with a 16.3-megapixel APS-C sensor, announced in 2013. A weather-sealed entry-level body that can also run on AA batteries with an optional holder. Specs - Maker: Pentax - Mount: Pentax K - Sensor: APS-C, 23.5 x 15.6mm, crop factor 1.5 - Resolution: 16.3 megapixels - Stabilisation: in the body - Announced: 2013 - Type: DSLR Focal lengths on it Lenses frame like 1.5 times their focal ...

From Pentax K-500: Pentax K-500: A DSLR by Pentax with a 16.3-megapixel APS-C sensor, announced in 2013. The K-50 without weather sealing.

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