I am trying to figure out what telephoto lens I should get for an upcoming trip to Alaska this summer. Already I have decided on the Sigma 17-70mm "Contemporary" lens which I have just ordered. However, I have become convinced that I am going to want something that offers a bit more telephoto capabilities along for this trip as well. Unfortunately, my budget for a telephoto lens is $200 max! And even that is a stretch.
Also, I currently have a Sigma DC 18-200mm that was only about $200 new when I bought it a few years ago. Nothing about this lens is really great. However, if I can't find anything better for my $200 budget, holding on to this 18-200mm lens is always an option.
Here are the lenses I am currently looking at-
- A used Pentax SMCP-DA 55-300mm ED lens. The one with green ring, no weather sealing.
- A new Sigma 70-300mm f/4-5.6 APO DG lens.
- The Tamron 70-300mm f4-5.6 Di LD lens.
Really I just want something that is going to be sharper than my 18-200mm, have less CA, and preferably fast autofocus. If I can't get something that is going to be noticeably better, I think I will just continue to go with my 18-200.