Archived posting to the Leica Users Group, 2018/10/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks Ric, I hadn?t hear of this rule. And the link is quite interesting. the camera hit 30 secs on auto - which was the limit given in the chart, I?m must be just lucky :-) Unfortunately, there?s too much haze tonight for me to take the 400mm Dicke Bertha out and try it on the skies at various speeds. https://en.wikipedia.org/wiki/Big_Bertha_(howitzer) <https://en.wikipedia.org/wiki/Big_Bertha_(howitzer)> I?ll try as soon as the weather and time allow. Thanks again Amities Philippe > Le 20 oct. 2018 ? 19:42, CartersXRd via LUG <lug at leica-users.org> a > ?crit : > > 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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information