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The following opinions have been automatically translated with Google Translate.
Opinion:We start with the cons: on optical Tamron, Nikon and tokina owned by me even you can stick, having the very protruding lens, only with the Tamron 70-200 VC graft is fine but the machine does not recognize the multiplier, as if it had mounted. Clearly lost a bit 'of clarity and autofocus slows, low light pictures are out of focus and those focused. In my opinion are the price to pay to extend the focal length of the lens. Mounted on d750 with Sigma 150-600 contemporary quality of the photo is just a hair less smooth than using optics. The best thing is that it keeps all the automations until f40 to the maximum focal length. In open conditions, light autofocus responds admirably. superlative construction, weight .... even feels backpack. Definitely I recommend it to those who have purchased the contemporary.
Pros:build quality, weather sealing, yield and possibility of continuous updating through the use of the dock station Sigma
Opinion:Interestingly the firmware update of sigma 150-600mm: It has improved the AF accuracy When attached to the TELE CONVERTER TC-1401.rnQuest'ultimo accessory is accompanied by this note of Sigma: AF is effective up to F8rnWhen the new SIGMA TELE CONVERTER That is attached to cameras are compatible with AF at F8, it is possible to shoot with AF.rn * When shooting subjects with low contrast or luminosity value, focus may not be spot on the subject. rnrnL'af is maintained when using professional lenses with a value of all of max Opening f.5,6 (with extender becomes f.8) .rnMantenimento AF even when used on Sigma 150-600mm and Sport as a canon SLR series 1 and 5d mark III (a 840mm we are f.9) rnrnaltre info here: rnhttp: //www.juzaphoto.com/topic2.php? l = en & t = 1615689 & show = 1