Reviews and Problems with Pentax smc DA 50-135mm F2.8 ED [IF] SDM
Showing 1-2 of 2
22 August 2012
Excerpt: Very disappointed with the copy of this lens I purchased. The auto-focus doesn't work properly at all unless shooting close up. Beyond 5-6 ft, forget about it. Even closed down to f 6.3, consistently out of focus, no where near the sharpness I've seen in the examples posted on here. Real bummer. Guess I caught hold of a bad piece of glass... Or maybe my cameras out of whack, but this lens has just been a frustration for me, and not even because of the SDM...
Excerpt: This lens has had to be converted to an 85-230 mm f/4.8 screw drive AF lens using the AFA 1.7X converter. The SDM failed again, after being repaired twice under warranty by Pentax Canada. I am not prepared to spend something like $300 on a repair that will probably fail again. Using it as a 50-135 relies on Catch-in-Focus and that works well, but II would much prefer to use it as a 50-135/2.8.
Pros: Optically Superb
Cons: SDM failed for the third time - out of warranty