Archived posting to the Leica Users Group, 2010/03/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]DoF I meant as Depth of Field (Death of Field?), i.e. the amount of "in-focus" zone, which is related to the focal length, distance to subject, distance of viewing, and size of print, and of course, the circle of massive confusion. On Fri, Mar 26, 2010 at 1:13 AM, Vince Passaro <passaro.vince at gmail.com>wrote: > That's what I thought you meant. But ain't that DofF? > > I'm going to make a pronouncement now: nobody really understands this crop > factor thing in a rational way: some of us (not I, but others, among you > guys) know from practice how a 35mm lens will look on a full frame M9 > versus > a 1.3 M8 versus a 1.5 Nikon versus a 2X G series, but no one can explain > it. The fabulous and popular new 20/1.7 for all you G-sters is a good > starting point. I look up and see new postings from the lens every day. And > the images don't look like 20mm images and they don't look like 40mm images > either, except when they've been cropped even further on PS or LR. > > On Fri, Mar 26, 2010 at 3:55 AM, Richard Man <richard at imagecraft.com> > wrote: > > > Perspective as in .... the vanishing point!! > > > > e.g. if you take a photo of a person with a building way behind them. On > a > > 40mm perspective, the building will appear one size, but a 20mm > perspective > > will (I'm pretty sure) make the building look smaller. > > > > > > On Fri, Mar 26, 2010 at 12:30 AM, Vince Passaro <passaro.vince at > > gmail.com > > >wrote: > > > > > Richard: I understand "closeness" and "frame" and DofF here, but I > don't > > > know what you mean by "perspective" in this case. Can you explain the > > > perspective part? > > > > > > On Fri, Mar 26, 2010 at 1:04 AM, Richard Man <richard at > > > imagecraft.com> > > > wrote: > > > > > > > Vince, try this: > > > > > > > > You are getting a ~40mm closeness, e.g. if you want to frame a > > headshot, > > > > you > > > > will end up ~where you would be if you are using a 40mm lens on a > 35mm > > > > camera, but the perspective (and DoF) would still be 20mm. Hence the > > look > > > > is > > > > not quite like straight 40mm on a 35mm camera. > > > > > > > > > > > > > > _______________________________________________ > > > Leica Users Group. > > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > > > > > > > > -- > > // richard <http://www.imagecraft.com/> blog: < > > http://imagecraft.wordpress.com> > > // portfolio: <http://www.imagecraft.com/pub/PICS/AnotherCalifornia2> > > // mailing lists: <http://www.imagecraft.com/contact.html> > > [ For technical support on ImageCraft products, please include all > previous > > replies in your msgs. ] > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- // richard <http://www.imagecraft.com/> blog: < http://imagecraft.wordpress.com> // portfolio: <http://www.imagecraft.com/pub/PICS/AnotherCalifornia2> // mailing lists: <http://www.imagecraft.com/contact.html> [ For technical support on ImageCraft products, please include all previous replies in your msgs. ]