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Forum: Pentax SLR Lens Discussion 07-13-2016, 02:45 AM  
Sigma says No
Posted By biz-engineer
Replies: 25
Views: 3,043
That's an interesting comparison. You could also say that a Pentax K1 + DFA150-450 cost less than a 645z body only. The 150-600mm contemporary lens is you get what you pay for. At the long end, the AF speed is approximately 3 times slower than a Pentax DFA150-450. It is nowhere written in Sigma's specifications. You discover it after you receive the lens. Feel free to purchase a Sigma 150-600 C.

If you want something that rocks, you would consider a Canon 7DII and a 100-400 II , because this beats any other combos in terms of sharpness and AF speed. Otherwise, you can get a sigma 50-500 to mount on you K50 , for less than half the cost of the Nikon combo.
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