Hi all: I just posted on my web site some simulated binocular views of globular clusters M4 and M80, along with a finderchart photo. These are meant to...
Saw for the first time through 20x80: Coathanger (so cute) M13 Jupiter with its 4 moons Through telescope: globular clusters in Saggitarius Uranus Neptune ...
Very, very nice! Sounds like you had a wonderful time! I love all of the objects that you have mentioned. I believe you mean 5 moons of Saturn? Jupiter only...
I have deleted 7 recent messages and 1 "pending" message to the same thread. I have explained the rationale for this before. For more specifics go to Files,...
Reading the front page of my local paper today, the main photo showed someone using a pair of the larger Canon IS binoculars, just like the ones I use. Alas,...
Saw 4 moons of Jupiter through 20x80. Saw 5 of Jupiter through a telescope. 5th, outermost, was dimmest. They were all in line with equator of Jupiter. a ... ...
... How observable with binoculars are the moons of our solar system's other planets? Typically at binocular magnifications threshold limiting magnitudes do...
Thanks Gary! This is the season for globs and a bino users dream! I got my first view of M4 a few nights ago and it was great to see an old friend! Mary M....
This is a very good summary Barry. For a chart that I developed showing BLM of a variety of binocular sizes under conditions ranging from mag 4 to mag 6.8, go...
... Someone else may want to step in here with data from another planetarium program, but it might have been Neptune. According to "Desktop Universe", Neptune...
I was near Jehlum city. Dont know long lat. About 32N lat and 74W long I suppose. Date May 31 around 2am that makes May 30 20:00 GMT at london without...
I find discussion on this thread very interesting. Thanks. a ... From: Barry Simon To: binocularastronomy@yahoogroups.com Sent: Thursday, June 04, 2009 5:32 a ...
... Ali, If they were all equally spaced, the "mystery" object was not Neptune, but it was not a Jovian moon either unless the 4 known moons were at least...
The mystery is now solved. The "Mystery Moon of Jupiter" seen by several a few nights ago was actually the star TYC 5801-839-1 A star map can be seen showing...
Wow! Thanks! The 5 "dots" around Jupiter were visible in 8" and above. 20x80 showed only 4 "dots" and no sign of the fifth or perhaps I didnt look hard enough....
... WG: As an aside, and as a matter of interesting technical curiosity to some perhaps, there have been some few folks with exceptional vision that could...
Lahore Omer offered me a ride in his car to Rohtas. This was a great help. To enable me to easily stay awake all night at Rohtas, I planned to keep awake on...
Any of you guys here used these binocs? A fellow has a pair for sale I want to try and get. I have a pair of 16X80s branded for Orion. I think they both are...
... John, My first pair of "giant" binoculars were a pair of Celestron 11x80's with advertised 4.5 degree field. I got mine back about 1980 or so. at that...
I agree with you Barry. 11x and 5 mm exit pupil means one can only use 55mm of that 80mm objective lens. One will be carrying extra weight for no reason,...
I'm not sure where the 5mm and 11X comes from. Anyone who's been in astronomy for awhile has heard all about the "wasted" light from an exit pupil larger than...
John- An 11x80mm binocular has a 7.27mm exit pupil (80/11). This means it puts out a 7.27 mm diameter circle of light. A young adult's dark-adapted eye opens...
Barry Our Umair Asim says that the star I saw was another one. a ... From: Umair Asim To: a Sent: Sunday, June 07, 2009 9:53 . Subject: mysterious star at...
What happens if your eye moves, are you not using that 2.27 mm of that circle of wasted light? The only way smaller binoculars are better then larger ones are...
While in theory, it sounds like that would be the case, such is not... I'm not that good at explaining the issue of an oversized exit pupil on a binocular, but...
I could agree that under certain conditions an over sized exit pupil could cause a "washing out" of the sky, a similar effect can be seen with a regular...
I can't answer that, because obviously- I've never done that! You ought to pose the question over on C/N binocular forum- and research exit pupils over...
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