Originally posted by pdvair Thinking of getting a budget telephoto lens to try and capture some wildlife this winter. Can anyone recommend anything for $500 or less?
The obvious candidate is the Pentax 55-300. It's relatively compact, lightweight, reasonably fast and produces very good images, even wide open at 300mm. There are 3 versions, all optically identical: DA-L, DA and DA WR:
1. The DA-L has a plastic mount. It doesn't come with a lens hood, but you can get them for less than $5 on eBay.
2. The DA adds a metal mount and quick shift (i.e. manual focus override of autofocus). QS is a good feature, but whether it is worth the extra $50-100 is up to you.
3. The DA WR version adds weather resistance, so you can confidently use it in rain and snow.
Each version provides excellent value - especially the DA-L, which sells for less than $200 second hand. The IQ will be a significant step up from your 50-200.
There are plenty of reviews and articles about this lens on this site. Have a good look at the photo samples too.
Once you want to go beyond 300mm, things get more complicated and expensive. For under $500, you would be looking at a manual focus lens (not ideal for moving objects) or something like the Sigma 170-500 (which I have). These lenses are all much bigger and heavier. The 170-500 is about 1.2kg and it is about the lightest of the long lenses. Lenses of that weight and bulk require more commitment! I wouldn't suggest you leap into getting such a lens without trying something like the 55-300.
Pentax are about to announce a new long telephoto lens. It is likely to cost significantly more than $500, but it might lead a number of people to sell their old lenses off, possibly at lower prices.