Originally posted by zeitlos Besides size, this is also an important factor for me. But is the Pentax really that much lighter?
Tamron: 1320 g
Pentax: 1040g (36.7 oz.) without hood 1120g (39.5 oz.) with hood, 1.230 g with hood and tripod adapter.
I suppose that the Tamron is 1320 including the hood and the tripod adapter?
Awhile ago another Forum member asked about size difference in lenses. I posted these photos of some various lenses. The Tamron 70-200 and 60-250 are second and third from the right. Fully extended the 60-250 is slightly longer than the Tamron. Overall the 60-250 is lighter and more compact. It fits better in a camera bag. However when I really need the extra stop, and there are times I do, the Tamron goes. If size and weight are a major concern than the 60-250 is definitely the way to go.
From left to right;
Sigma 50-500 OS HSM, this lens has become to heavy to carry.
Tokina 400mm 5.6, lightweight and compact but best IQ is at f11.
HD DA55-300 WR, This and the 18-135 where my all around kit.
DA*60-250, my K-1 all around kit and the DFA 28-105.
Tamron 70-200, my sports, action, and close up lens.
DA 18-55, sits in a drawer and never comes out.