| What you describe calls for faster lenses than the Tamron zoom. The 16-50/2.8 would be a good choice if you realy want a zoom, the 50/1.4 is a good choice for a portait lens, though I recently bought a Voigtlander 58mm f/1.4 and I do think it is a better lens for portraiture. It is manual focus though, if that is important to you.
I am an old school zoom lens hater, so my choice of lenses for weddings (I've shot them for 35 years) is fast primes. On digital, my choice would be 31mm LTD (or 35mm f/2 if you are on a budget) as a standard lens, the 21mm LTD (slow, but good quality optics), or an FA 24mm f/2 if you can find one, the 50mm or 58mm 1.4, and the 77mm LTD (70mm LTD as second choice).
Note these are all relatively fast primes, except for at the short end, where there aren't really any good solutions available.
I don't really think zooms are a good choice, as they tend to make for lazy photography (standing in one spot and taking pictures rather than finding the best vantage point for the picture), but I tend to be disagreed with a lot on this, usually by less experienced photographers......
Also, zooms that change aperture as you zoom can play havoc with fill lfash ratios, the slow apertures can cause the AF to fall on it's face, and can force shutter speeds slow enough to allow subject movement to ruin pictures.
Also, I'd stay with one lens family. Don't be mixing brands. Pentax lenses all have very similar colour renditions, which will make for more homogenous photo albums that what you will get if you are changing from a Pentax to a Tamron. |