ISO 100 as far as possible. Maximum up to ISO 1,600 (ISO 3,200 useable).
On 16-50mm, keep within the ranges of 20-40mm, best probably around 24-35mm. There is a photozone.de test results that indicates the range of best focal lengths. As far as possible, at least 1.5-2 stopped down from widest. Turn down the auto-noise reduction to a lower setting.
Experiment with the A6000's manual focusing which has a image magnification feature that makes it so easy to focus. Try that.
Thank you for the great advise and lens review site!
Sony E 16-50mm f/3.5-5.6 OSS PZ (SEL-1650) – Review (check out the charts for 16 and 18mm)
http://www.photozone.de/sony_nex/842-sony1650f3556oss?start=1 (charts)
http://www.photozone.de/sony_nex/842-sony1650f3556oss?start=2 (conclusion & Images)
After viewing the images taken with this lens and seeing how the resolution drops of so drastically from the center, I will NOT be wasting my time or money on this lens. I checked a few other reviews sites and they all confirm that this lens is a POS. Right now, I have an Olympus XZ-2 that takes MUCH better/sharper images, from corner to corner, throughout the focal range than this lens does.
I have decided to wait to see if Sony does come out with a revised 16-50mk2 and 16-70mk2 early next year. If that happens and the a7000 does materialize, I will be interested in this system to consider at that time.
I am not sure what you are after, but the E18200, the E1650, the E1855 and the E1670 score all very similar on the 24Mp A6000 sensor. These are all zoom lenses, and they are all pretty close. Check in any review e.g. the E24Z, E50 or Sigma 60 - this primes score much higher.
However, these feebled kit zoom lenses have been reviewed against the best kit zooms from the Canikon like, and, as zoom lenses, they outperformed the other brands.
Since then, there have been $1k "Pro" zoom lenses made available, but I would still not hold my breath in a zoom-versus-prime shootout.
Of the aforementioned lenses, the E1670Z is the best, optically, and includes the constant f/4. Best optically means that it requires the least amount of corrections. The E1650 otoh is the weakest optically (it includes the most distortion, not surprising its compact design) and relies strongly on software correction. (And reviewers cannot hasten enough to point to this phenomenon).
Many of today's modern cameras apply correction profiles, and when ONLY looking at the results post correction (OOC JPG or post-edit JPG), the differences between the 'best' E1670Z and 'worst' E1650 are very, very minute. But put them up against a E25Z or Sigma 60 and you'll find a lot of IQ differences between the prime and zoom lenses.
If you believe that an ultimate zoom lens will ever exist, good luck to you.
But if you want the convenience of a zoom lens, the (output corrected) E1650 arguable gets you within 95% of what the 'ultimate' zoom lens will deliver.
Morale here: if you want uppermost IQ, get a prime, go for a high resolution sensor, get the largest sensor that you can find, consider AA-less solutions.
Fuji, in their AA-less cameras, gets very impressive images out of a 16Mp sensor. Their trans-X layout makes it less compatible with third party software, so you loose some here.
Sony, in their A7r, lets you find unsurpassed IQ - that may be a place to look.
But the 24Mp APS-C cameras by Sony deliver very high output quality. Put up the E24Z and see for yourself.
Now use the E1650 in practice, especially when avoiding wide-open, and you'll be rather impressed with what this little lens delivers. See various threads attesting to this observation here already.
Forget about the a7000. Start thinking about using prime lenses, or, like the rest of us, be pleased with zoom lens output once and a while...