[Leica] Tested long exposure on the night sky last night - Howard

[CartersXRd]

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 à 17:04, Howard Cummer via LUG <lug at leica-users.org> a écrit :
>> 
>> 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
>> 
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> 
> 
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