Tamron 14-150mm f/3.5-5.6 vs Panasonic 14-140mm f/3.5-5.6 Power OIS on E-M10

I presently have 2 EM10s (also EM1) an Olympus 14-150 and Tamron 14-150.  I've also had 2 different copies of the Panasonic 14-140 and both suffered from significant shutter shock on either EM10 or EM1.  I was quite disappointed in this as I liked the handling and build quality of the 14-140.  On one shoot w/ the 1st 14-140, out of about 400-500 photos, way more than 1/2 showed significant shutter shock-- same w/ the 2nd.  I sold both, hopefully to Panasonic owners.  It's a lens I wanted to like but in the 1/30 to 1/500 sec range (an important SS range IMO) neither was even close to acceptable-- that includes both copies.

I've had the Oly 14-150  (bought it refurbished) for a couple years and consider it a good decently sharp lens (for this class of lens).  The Oly is well built and nice to handle and to shoot with, and It's a very versatile lens that shows no evidence of shutter shock.  I bought the Tamron recently, and more out of curiosity than anything else, but I like it's appearance a lot better than the Oly-- bright black and industrial looking--  though they are about the same price at around $600. new cost.

The Tamron 14-150 is also decently sharp and nice to shoot with in good light.  Personally, I consider the Oly and Tamron about equal optically and it would likely  take rigorous testing to determine differences.  They are both a bit soft at max zoom, but that is normal for this class of lens and the files sharpen up pretty well-- I use PSP X7.  Both can be made to flare under severe conditions but I consider both to have fairly good flare resistance to flaring.  I don't pay much attention to CA but would notice it if serious, and I don't think it is though I've seen some at WA in high contrast areas.  Both have nice smooth well damped zoom action w/o being to loose or too tight, and they're really close in size and weight.  Barrel distortion must be corrected in the EM10 as it doesn't really show up with either.

The only reason I like the Tamron better is simply appearance.  Personally, I would recommend either the Olympus or Tamron 14-150 for general purpose shooting in decent lighting, and understanding their limitations e.g they're not prime sharp, nor even good zoom sharp, but I wouldn't hesitate to carry either if I wanted to pack light and didn't want to hassle with changing lenses.  Both of mine are adequately sharp.  I'm also going to try posting this as a Tamron 14-150 review-- sort of got carried away here.

Good Luck.  John