I have DA*16-50mm and a borrowed Sigma APO 50-500mm with HSM.
I was told that Sigma lens with HSM is longer in the market than Pentax which gives them an edge.
However, when I used both lens on my K20D, the DA* noise level is much quieter.
Was I making a wrong comparison with a larger lens, since larger lens requires bigger motor?
I was told that Sigma lens with HSM is longer in the market than Pentax which gives them an edge.
However, when I used both lens on my K20D, the DA* noise level is much quieter.
Was I making a wrong comparison with a larger lens, since larger lens requires bigger motor?