Archived posting to the Leica Users Group, 2018/10/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]from the internet/petapixel Here?s the 500 Rule: 500 Divided By the Focal Length of Your Lens = The Longest Exposure (in Seconds) Before Stars Start to ?Trail? > On Oct 20, 2018, at 11:22 AM, Philippe via LUG <lug at leica-users.org> > wrote: > > Eppur si muove ;-) > > https://en.wikipedia.org/wiki/And_yet_it_moves > <https://en.wikipedia.org/wiki/And_yet_it_moves> > > We may not perceive the tracks just because the FL is so short, and the > sensor doesn?t record the jump from a pixel to the next one ??? > > Although I was using a tripod as you may imagine, I had left the IOS on, > that could be another reason why. There was absolutely no wind and the > foliage seems to prove it. > > OTT 10mm means 15mm in Leica world, but it doesn?t modify the result ... > > I?ll try a longer lens at the earliest opportunity, say the Novoflex 400 > (600 eq.) for instance, and see what I get, and report. > > Thanks Howard. > > Stay well, and vigilant :-) > > Amities > > Philippe > > > >> Le 20 oct. 2018 ? 17:04, Howard Cummer via LUG <lug at leica-users.org> a >> ?crit : >> >> Hi Philippe, >> I am surprised that you can take a 30 second exposure with a 10mm lens >> and have such small star tracks. When I shoot the skies with my 90mm >> Elmarit on the M10 - above 8 seconds I get quite pronounced star tracks. >> >> Just an observation. Lovely photo BTW. >> Howard. >> >> >>> On Thu, Oct 18, 2018 at 1:36 AM Philippe via LUG <lug at leica-users.org >>> <mailto:lug at leica-users.org>> >>> wrote: >>> >>>> Tested long exposure on the sky last night. >>>> >>>> http://gallery.leica-users.org/v/Phileica/Playground/Stars-1354-2.jpg.html >>>> >>>> <http://gallery.leica-users.org/v/Phileica/Playground/Stars-1354-2.jpg.html> >>>> < >>>> http://gallery.leica-users.org/v/Phileica/Playground/Stars-1354-2.jpg.html >>>> >>>> <http://gallery.leica-users.org/v/Phileica/Playground/Stars-1354-2.jpg.html> >>>>> >>>> >>>> May be viewed larger. >>>> >>>> Amities >>>> >>>> Philippe >> >> _______________________________________________ >> 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