Sigma 105mm f/1.4 ART: Dustin's Final Review | 4K

Sigma 105mm f/1.4 ART: Dustin's Final Review | Thoughts on focal length 85mm vs 105mm vs 135mm 0:35 | Build Observations 4:30 | Autofocus Accuracy 9:02 | Autofocus Conspiracy Theory 14:43 | Autofocus Tracking 16:27 | On Sony 17:28 | Image Quality 18:10 | Dustin's Wrap-up 21:17 Read the Final Review: http://bit.ly/105ARTda Visit the Image Gallery for more: http://bit.ly/105ARTig Purchase the Sigma 105mm f/1.4 DG ART @ B&H Photo: https://bhpho.to/2AA3Dbx | Amazon:  https://amzn.to/2v8t2nG | Amazon Canada: https://amzn.to/2LMuWV5 | Amazon UK:  https://amzn.to/2LK9v76 | Amazon Germany: https://amzn.to/2n2SC8S | Ebay: http://bit.ly/105ART Want to support this channel? Use these affiliate links to shop at: B&H Photo: http://bhpho.to/1TA0Xge Amazon: https://www.amazon.com/shop/dustinabbott Ebay: http://bit.ly/DustineBay Make a donation via Paypal: paypal.me/dustinTWI Get a discount off all Skylum Editing Software (Luminar, Aurora HDR, AirMagic) by using code DUSTINHDR at checkout: http://bit.ly/LuminarDLA Become a Patron: https://www.patreon.com/dustinabbott | Check me out on: Personal Website: http://dustinabbott.net/ | Sign up for my Newsletter: http://bit.ly/1RHvUNp | Instagram: http://bit.ly/DLAinsta | Google+: http://bit.ly/24PjMzv | Facebook: http://on.fb.me/1nuUUeH | Twitter: http://bit.ly/1RyYxIH | Flickr: http://bit.ly/1UcnC0B | 500px: http://bit.ly/1Sy2Ngu My filming setup: Sony a7R III: B&H Photo: https://bhpho.to/2D6ibNO or Amazon: http://amzn.to/2CNxOvH | or | Sony a9 @ B&H Photo: https://bhpho.to/2HyWIyt or Amazon: https://amzn.to/2s1vYE0 Tamron 28-75mm F2.8 RXD @B&H Photo: https://bhpho.to/2FA00la or Amazon https://amzn.to/2G2kaEr Lights: Rotolight AEOS @B&H Photo https://bhpho.to/2IK7mqV | Genaray Contender @B&H Photo: https://bhpho.to/33HbGNM | and Aputure AL-MW: https://bhpho.to/2N3MtZV