Archived posting to the Leica Users Group, 2018/10/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]link with article for 500 rule <https://petapixel.com/2015/01/06/avoid-star-trails-following-500-rule/> ric > On Oct 20, 2018, at 1:35 PM, CartersXRd via LUG <lug at leica-users.org> > wrote: > > 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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information