The Superzoom which actually DOES it

I`ve got my GX7 back and the weather has become dull so have been able to to do a Mech shutter vs electronic shutter test with the 14-140 ...

All I can say is that I`m amazed at both Oly and Panasonics severe shortsightedness regarding the shutter shock issue - APS-C Mirrorless cams have had Electronic first Curtain since the Samsung NX10 and Sony Nex-5N (Years) yet the only M43 cams with it currently are the Oly EP5, EM10 and EM1 and they only had it after a very late firmware update after complaining reviews .. there isn`t a SINGLE Panasonic body with the feature and shutter shock is both real and repeatable .

the GX7 thankfully has a full electronic shutter which combats this without crippling the RAW output in the way that the GM1 and GH4 do but there`s still chance of rolling artifacts so there`ll always be a compromise od some kind with a Panny body and an even more severe one with all Oly bodies bar the THREE mentioned above ... Panny need to do an EFC firmware for the GF6, G5, G6, GX7, GM1, GH3 and GH4.

Anyway this lens`s OIS can be a bit drifty in the finder but it`s capable of handholding at 13th sec full zoom (sitting down , no special bracing) with 4 out of 5 keepers and 3 of those pixelpeepable at 100% ..... DO use the electronic shutter though .

ALL 100% Crops showing Shutter shock at 140 250th sec compared to Electronic shutter - both sharpened with the same PS Action followed by the 13sec 140mm test ..... Click ORIGINAL to see full size, the forum viewer smudges detail

All 100% Crops - click Original for full size