The el cheapo 650-1300mm zoom, for those who care
in [Digital Cameras]
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From: RustY � on 2 Jan 2010 06:27 "Robert Coe" <bob(a)1776.COM> wrote in message news:mj0sj5laggi6aog7q7h3jnceh3k6o0ombu(a)4ax.com... >You can make focal lengths out of > rolled steel, but castings are never used. > > Bob I happen to have it on good authority that steel [and copper] are used by the best camera casters - according to experts on this very information site. I am also told that all focal lenses are always cast - so there!
From: Bruce on 2 Jan 2010 06:52 On Sat, 2 Jan 2010 11:27:08 -0000, "RustY �" <No.Mail(a)All.Thanks> wrote: > >"Robert Coe" <bob(a)1776.COM> wrote in message >news:mj0sj5laggi6aog7q7h3jnceh3k6o0ombu(a)4ax.com... > > > >>You can make focal lengths out of >> rolled steel, but castings are never used. >> >> Bob > >I happen to have it on good authority that steel [and copper] are used by >the best camera casters - according to experts on this very information >site. I am also told that all focal lenses are always cast - so there! I think you'll find that ED lenses are forged.
From: RustY � on 2 Jan 2010 13:45 "Bruce" <docnews2011(a)gmail.com> wrote in message news:9rcuj5t6talgh7jdsd2s755uhnt54ndi0t(a)4ax.com... > > > I think you'll find that ED lenses are forged. > I think I've heard something about tripod headers being forged too...............
From: Bruce on 2 Jan 2010 14:00 On Sat, 2 Jan 2010 18:45:54 -0000, "RustY �" <Nomail(a)All.Thanks> wrote: > >"Bruce" <docnews2011(a)gmail.com> wrote in message >news:9rcuj5t6talgh7jdsd2s755uhnt54ndi0t(a)4ax.com... > >> >> >> I think you'll find that ED lenses are forged. >> > >I think I've heard something about tripod headers being forged >too............... Could be. There are Chinese-made tripod heads that so closely resemble models from well known European manufacturers that they could accurately be said to be forgeries. ;-)
From: Paul Furman on 2 Jan 2010 14:16
Robert Coe wrote: > On Fri, 01 Jan 2010 18:55:41 -0800, Paul Furman <paul-@-edgehill.net> wrote: > : Robert Coe wrote: > : > RustY � wrote: > : > : RichA wrote > : > : > : > : > long exposure needed > : > : > with an f16 focal length ............... > : > : > : > : What? > : > > : > Don't be snarky. Rich has no particular reason to know the difference > : > berween aperture and focal length. Neither of them is made of plastic. > : > : I disassembled a 28-200 old-ish film super-zoom and it has plastic > : aperture blades. I wouldn't be surprised if that's used in high end > : lenses too. > > They wouldn't rust, and you might not have to oil them. And oil that isn't > there won't drip onto a lens element. No oil. -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |