Originally posted by eurostar Plus they are not great on IQ, they are not sealed, they are quite slow. Not what we can expect from a Pentax supertelephoto.
More trash talk on third party lenses.
I don't know your experience level and how you evaluate your lenses. But I have been buying lenses for over thirty years to cover my use of four different film formats. I make my living peering through a viewfinder with said lenses on the other side.
I like Pentax lenses. But, contrary to your supposition that IQ is not great on Sigma lenses, I have to ask you... what the hell are you talking about?
I have owned perhaps fifty Pentax lenses during my life. Most were quite good to exceptional. I have owned three Sigma EX DG lenses that I purchased over the last few years. They are among the best lenses I have ever purchased.
If you spend money for the right professional grade lenses you get what you pay for. Sigma makes many exceptional lenses and as a loyal Pentaxian I don't feel in the least bit let down by my Sigma purchases.
And if you think that the QC problems that Sigma sometimes is slammed for are a problem, I can assure you that Pentax certainly looks to be vying for a top spot on the poor QC platform also over the past few years. That is something I never witnessed in a lifetime of using Pentax equipment before. But times have changed.
Stephen