The Pentax DA 18-270mm has an average review score of 70%

Score (%):
Pentax SMC DA 18-270mm f/3.5-6.3 SDM Lens Review
Lenses that cover high zoom ranges such as this lens are always a bit of a compromise. However, this lens does perform well at shorter focal lengths, but the lack of sharpness at the telephoto end my be enough to put many prospective purchasers off this lens.
Read the full review...