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Two new Sigma lenses: 18-200, 50mm f/1.4
#15
Even with modern cross hair style AF what is the effective f stop they are capable of ? Also to have quickish AF speed there needs to  be an amount of play in lens focus, when you are getting to f 1.4 and f 1.2 with almost no DoF, then most of these things are marketing gimmicks. Look how cute our designers are !

 

The (lack of) quality of Live View on OVF cameras means that you need a lot of practice and luck to get a reasonable  in focus rate.

  


Messages In This Thread
Two new Sigma lenses: 18-200, 50mm f/1.4 - by peterottaway - 01-07-2014, 04:59 AM
Two new Sigma lenses: 18-200, 50mm f/1.4 - by frank - 01-07-2014, 10:20 AM
Two new Sigma lenses: 18-200, 50mm f/1.4 - by Scythels - 01-08-2014, 11:25 PM
Two new Sigma lenses: 18-200, 50mm f/1.4 - by peterottaway - 01-09-2014, 01:02 AM
Two new Sigma lenses: 18-200, 50mm f/1.4 - by wojtt - 02-10-2014, 07:26 PM

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