Archived posting to the Leica Users Group, 2009/06/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]OK, someone has to say it ;-) my 1.4 50 doesn't vignette and it isn't fat, with 46mm filter size. Don't need no stinkin' DC motor or AF on your Summilux. 2009/6/5 Thein Onn Ming <mingthein at gmail.com> > Still vignettes, as does the Nikon 50/1.4 AFS which also has a ring motor - > to be precise it's a coreless DC motor whose lens elements sit in the hole > where the motor spindle normally goes, and the helicoid is wrapped around > that whole bundle. > > On Jun 5, 2009, at 3:33 PM, Mark Rabiner wrote: > > I was just looking up 50 1.4's as I saw the Sigma >> And its filter size is 77. >> I thought I was looking at a 14 2.8 >> >> The Nikons is of course using a 52mm filter size and the Pentax a 49mm >> filter size. >> The Canon 50 1.4 is not its classic 55 mm canon filter size but 58mm. >> >> I'd love to know what goes into this Sigma lens. >> 500 bucks it cost. >> >> I would love to read Erwin's take on what a 77mm filter size on an optic >> which should be the single easiest to design does. >> I would guess no vignetting issues at all. Just a guess. >> >> http://www.dpreview.com/news/0808/08081802sigma50review.asp >> >> It has a Ring-type ultrasonic focusing motor. >> I like the sound of that! >> >> I wish I knew what kind of rings though! >> >> Newton? >> Lord of? >> Van Allen? >> Ring Cycle? >> Ring around the collar? >> >> >> Mark William Rabiner >> >> >> > THEIN Onn Ming > *photohorologer ming at www.mingthein.com > www.flickr.com/mingthein > > > > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- Cheers Geoff 'Ich bin ein Berliner'! http://gallery.leica-users.org/v/gh/ http://www.pbase.com/hoppyman