The Pentax DA 17-70mm has an average review score of 83.5%

Score (%):
Pentax 17-70mm f/4 AL IF SDM SMC DA
This lens has rarely been off of my K20D since I bought it last summer. It has a great range, and is a great upgrade from the kit lens.
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Pentax SMC DA 17-70mm f/4 AL [IF] SDM
The Pentax DA SMC 17-70mm f/4 AL [IF] SDM is undoubtedly the most desirable standard zoom lens in the current Pentax lens lineup. The resolution characteristic is very good without any significant weakness.
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