This is a Pentax lens that has a maximum focal length of 210 mm and a minimum focusing distance of 0.95 m. The filter size for this lens is 67 mm, so make sure the filters will fit.
From Photospecialist
Pentax D HD FA 70-210mm F/4 ED SDM WR
The product is available from £796.95 at international stores.
This product is also available at 1 unverified merchant.