the faintest star do you see?
Posted 05 July 2005 - 11:32 AM
this site http://www.go.ednet....o/maglimit.html
tell us how to calculted for telescope but not for binocular;
somebody said for binocular with one eye we can say (ADD?) 0.38
in real world
I can say I see all the Pleiades stark, that is 12 mag in the bad sky of quebec city.
I have 25 x 100 chinise binocular but very big eye relief
excellent for me.
and you, what is your faintest object?
Jack, just trying to help out a little here.
Posted 05 July 2005 - 11:44 AM
I've tried many times to find out,
what is the faintest star I can see with my binoculars.
With my 25x100s the faintest I have seen is mag 12.0 under a mag 5.7 sky. If I could get those 25x100s to a darker sky, say mag 6.5, I would be able to see fainter stars.
The faintest star I have ever seen under mag 5.7 skies
with a 20x80, mag 11.3
with a 15x70, mag 10.9
with a 12x50, mag 10.7
with a 10x50, mag 10.5
Posted 06 July 2005 - 01:32 PM
The author clearly writes that this is for dark skies with a tripod.
About twenty years, ago, on a wintry night, when I lived in light polluted Brooklyn, using a 7x50 binocular, I spotted an object near Saturn. The next night, I saw the object had changed its position relative to the planet. In those days, I was new to astronomy and I did not have an ephemeris and the web was hardly a reality. A 'phone call to the Hayden Planetarium's information desk, confirmed that it was Titan, which is magnitude 8.3.
Now that I live in Manhattan, I doubt if I could repeat that observation. Attempts to see other moons of Saturn with a 12x50 have been fruitless, but would seem to be within Edz's capabilities.
I would guess that Quebec City is no worse than Brooklyn.
Posted 06 July 2005 - 03:50 PM