Originally posted by normhead I am seriously considering a PLM even though I have Tamron 300 2.8 and DA*60-250 (screw drive and SDM) just for the AF speed and relatively light weight. But the Tanrob 300 2.8 is also very fast focusing, and so few were made I doubt anyone has both to tell me if the PLM lens is faster focusing than the 300 2.8.
I keep looking at the PLM lens as a lightweight telephoto for canoe trips and hikes. The fact it doesn't work on my wife's K-5 is a definite draw aback. I Like to buy lenses we can both use.
I have a DA* 200 and the 55-300 PLM. The PLM at 200 mm is much faster focusing than the DA* 200. As you noted the one drawback is that I cannot use it on my K-5. I use the 55-300 PLM on outings in good daylight on my K-3 and use my DA*200, with or without the 1.4 TC on outings where the lighting is not good and on my K-5. One other possible drawback to the 55-300 PLM is compatibility with the 1.4x TC. I tried it once on a very overcast day and although the autofocus performance was not impacted at all, the lens was at maximum aperture all of the time and I was able to get just as good performance by cropping pictures without using the TC. Perhaps it would be better if I tried it in good sunny daylight conditions.
---------- Post added 09-30-17 at 08:54 PM ----------
Originally posted by Wolfeye One thing I will throw out there is that the PLM version of the lens can not be serviced in the US. It has to be sent overseas for repair. If it breaks under warranty you'll have to wait at least 3 weeks for it to get back. Precision received my broken lens September 5th and it was just shipped back to me as of yesterday.
Based on my experience, that's not bad. I had two repairs on Pentax lenses.
1. Sent my DA 70 limited to Eric for sluggish aperture blades and it took 6 weeks. Lens was repaired to my satisfaction
2. Sent my HD DA 40 Limited to Precision for repair under extended New Leaf warranty. Lens was repaired to my satisfaction but it took two months!