daiqngo Loc: San Diego, CA

I've recently bought the Tamron 150-600 G2, and had my first field test with my Nikon D810 on gimbal/tripod. I realized some lens recalibration has to be done in order to get optimum results. I've ordered the tap-in console for just that, however I don't feel fully confident that I can perform adequately the tests needed for all the focal adjustments (150mm, 200mm, 300mm, 400mm, 500mm & 600mm). Another option for me is to send the lens to Tamron along with my D810 to have it calibrated. What kind of experience has anybody had with this send-in option? What's the typical wait period? Thank you.
(I live in San Diego CA, BTW)

Strodav Loc: Houston, Tx

I was not happy with the IQ of my Tamron 150-600mm f5-6.3 G2 out of the box on a D7200. Exchanged a few Emails with Tamron Cust. Svc. and they recommended I send both the lens and body to them for calibration. They did not find any problems with either the lens or camera and did the calibration. When I got it back it wasn't much better, so they didn't calibrate it at every distance and zoom factor, probably just one point. I got a Tap-In and started tuning. There was a learning curve, but I got it done and am now very happy with the results.

Here's the best advice I can give you. Live View and AF work differently (contrast vs phase). You will get the sharpest image possible with lens and camera in Live View mode. So, start at 20 meters, aperture wide open, tripod, AF-S, spot focus, remote release, well lit resolution target with a good place to focus, take like 3 shots in Live View and 3 in AF moving the focus ring off a bit before each shot, which forces the system to refocus before each shot at 150, 200, 300, 400, 500, and 600mm. Move to post processing and check the LV and AF images 1:1. Most likely the LV shots will be sharper than the AF shots, which means you need to tune. If they are the same, that's the sharpest its going to get at that distance and zoom factor. Eventually, you will need to tune all 18 spots in the table. It really is a great lens after tuning. If you don't want to deal with it, send it back and buy a Nikon 200-500mm. Good Luck!