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Proper "rule" for pinpoint stars with M43

Started Oct 27, 2016 | Discussions thread
OutsideTheMatrix
OP OutsideTheMatrix Veteran Member • Posts: 9,876
Re: Proper "rule" for pinpoint stars with M43

Giiba wrote:

phil from seattle wrote:

yeah, astro...

However, I'll add my experience - I got perfect stars with 25 second exposure, 12 mm (24 mm EFL), f2.8.

I found 25s was a touch too long when pointed at the celestial equator, but gave decent results for Orion and good results for Polaris.

My spreadsheet numbers seem to be a reasonable max for the equatorial zone and can be uped as you point your field of view towards the poles.

I'm wanting to buy a tracking mount to use with my longer lenses for better spot details.

Me too- my only issue with tracking mounts is achieving polar alignment (ugh.)

If 25s is too long for 12mm then 20s will be too long for 14mm?

 OutsideTheMatrix's gear list:OutsideTheMatrix's gear list
Nikon Coolpix P900 Olympus PEN E-PL6 Olympus OM-D E-M10 II Olympus M.Zuiko Digital 14-42mm 1:3.5-5.6 II R Olympus M.Zuiko ED 75-300mm 1:4.8-6.7 II +9 more
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