I've kinda ruled out the 16-50 seems to be too many problems and it's luck of the draw as to whether you'll get a good one or not, seen 3 on eBay and when I contacted the sellers all 3 had been in for repairs
Petebuster11 wrote:I've kinda ruled out the 16-50 seems to be too many problems and it's luck of the draw as to whether you'll get a good one or not, seen 3 on eBay and when I contacted the sellers all 3 had been in for repairs
Yes - it does have a poor track record for SDM failures, but this is part of the reason that there have been several at very low prices recently (I've seen some under £300). It is possible to convert the lens to "screw-drive" focus only, if you don't mind the slightly slower AF then the optics are excellent quality. I'm usually a "prime" user, but when I need to take out an outfit that covers most needs in as few a lenses as possible the 16-50 goes in the bag along with the 60-250
I had a Pentax 16-50 but sold it on for the Sigma 17-50, I thought that the Sigma handled much better and felt "nicer". The other plus point for me was that the Sigma was the same layout as its sister lens ..the 10-20mm, so in the end it was an easy choice...I have no regrets either...though I did keep my Pentax 50-135 over the Sigma 50-150 as its just better all round & so, so sharp.....
depends if you need a weather sealed lens which the 16-50 is, also i thought the new motors are far more reliable now. so if one has been repaired for the SDM problem it will have the latest motor fitted i imagine. owned an old one for a couple of years and never gave a problem. have Sigma lenses as they are cheaper than Pentax but do miss that "Pentax Colour" with them.
I was lucky that most of the 16-50s in Singapore did not have the SDM issue. There was only 1 recorded case that had to have the SDM motor replaced. Most of us have had our 16-50 since 2008. I got the 16-50 because I wanted the WR.
As Smeggy has mentioned the new ones with the new motor should be fine.