Nikkor vs. Tamron vs. Sigma lenses | The Photography Forum
2012年10月3日 · Both those Tamron and Sigma lenses are highly rated... Both nikon's are better lenses. However, The Sigma 17-50mm f/2.8 EX DC OS HSM @ $600 is an AMAZING lens …
Sigma Art lenses with Sony E mount vs Sony G Master lenses
2019年4月16日 · The way they handle auto-focus might be different. The latest G Master 24mm F1.4 is much smaller than the Sigma equivalent, but the Sigma has a mechanically coupled …
Old Sigma lenses on Canon digital bodies - The Photography Forum
2009年10月4日 · I recently got a Canon 20D from eBay, and bought new a lovely 50mm 1.8. I also acquired/borrowed two EF fitting Sigma lenses which date back to film EOS …
Sigma, Tamron, or Tokina: Which and why? | The Photography …
2005年7月8日 · Sigma has traditionally made some of the worst quality lenses, really bad back focusing and just not very sharp... yet they also made the 18-50 HSM macro, which is so …
Help with evaluating Sigman 150-600mm Contemporary
2010年6月11日 · Canon EOS 70D + Sigma @ 600mm; Here are the results. Each pair of shots is arranged vertically. Cameras and lenses change horizontally in the order above. Despite lower …
Sigma -> Quantaray lenses. Any good? - The Photography Forum
2006年4月14日 · Sigma, who i'm sure you've heard of, made/makes a series of lenses and filters for www.ritzcamera.com called Quantaray. I currently use a 28-80 nikon and a 70-300 nikon. I …
Parfocal? Sigma Lenses 70-200 2.8 OS - Focus Through the Zoom?
2011年6月8日 · Sigma Lenses 70-200 2.8 OS - Focus Through the Zoom? - Canon Digital Photography Forums Of course, the 200mm is going to appear to have less depth than the …
Sigma lens on a canon camera | The Photography Forum
2020年4月28日 · Sigma makes the same lens in multiple mount types. It's the same lens, just with a different mount. They also make both crop and fullframe lenses, however for canon they only …
full time manual focus on sigma lenses. - The Photography Forum
2014年3月23日 · On some lens you cannot manually adjust the focus ring when the lens is set to Auto (AF) mode. When full time MF is ON you can adjust manually the focus ring in both AF …
Do you actually need the Sigma USB Dock
2014年9月25日 · ^That. Eight lenses, to be exact, according to Sigma's website--check this list out. Plus, with the art lenses, ALL it does is allow easy firmware upgrades and evidently some …