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Date: 19 Jun 2007 06:54:34
From: vic
Subject: Oberwerk 11x70 vs 12x60's ... which one to choose??
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Thanks to the appreciated response I have received, I have finally
narrowed my choice to the Oberwerk 11x70 or the 12x 60 binoculars.
They will be used for 75% terrestrial and 25% astronomical viewing.
What are the practical differences between these two models?
It would seem the difference in the two powers is not significant.
Will the image qualities differ between the two aperture wise?
Any hands on experience would be appreciated!
Thanks again for your hands on advice!
Jim
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Date: 11 Jul 2007 01:30:39
From: pascal
Subject: Re: Oberwerk 11x70 vs 12x60's ... which one to choose??
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I have used all sorts of binoculars in the past but since i have
purchased a pair of stabilized i think that is the way forward for
astronomy observations at least. Aperture is important but i can tell
that with stabilized you see a lot more stars than with non
stabilized, with non stabilized you hardly see the ring around saturn
or you guess it because u know it is there and u spend your time
trying to stop your natural shaking movements, with stabilized it is
there, it does not move and you see it clearly.For terrestrial, you
see things written miles away when with non stabis you can't
concentrate. Stabis (Canon IS, fujinon stabis - the ones i have 14x40)
cost 4 times more but are worth 10 times, got mine on email for
600USD, used one year but it does not age. When you are in a car as a
passemger you can use them, nothing moves except yourself. For
traveling you don't need a tripod.
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Date: 10 Jul 2007 17:44:51
From:
Subject: Re: Oberwerk 11x70 vs 12x60's ... which one to choose??
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On Jun 19, 6:54 am, vic <victorv...@gmail.com > wrote:
> Thanks to the appreciated response I have received, I have finally
> narrowed my choice to the Oberwerk 11x70 or the 12x 60 binoculars.
> They will be used for 75% terrestrial and 25% astronomical viewing.
> What are the practical differences between these two models?
> It would seem the difference in the two powers is not significant.
> Will the image qualities differ between the two aperture wise?
> Any hands on experience would be appreciated!
>
> Thanks again for your hands on advice!
>
> Jim
Hi Jim
Part depends on how old you are. You'd need to know the size of
your pupils at night. Typically, the glare is less if the exit pupil
of the
binocular is less than the diameter of your pupil. The exit pupil
is tha aperature divided by the power.
The other issue that is also related to how old you are is how steady
you can hold the binoculars. I typically tell people that you don't
want
to go more than 10 power at night and use hand held. For us older
folks, 6 or 7 power is more practical.
You can get an idea as to if your eyes pupil is not taking advantage
of the size of the lense by placing a disk of paper over the input
that almost obscures the entire lense, leaving just a small annular
ring.
Look at something like the moon with night adapted eyes.
If you can center your eye in the
eyepiece, such that you can't see the moon, the exit pupil is most
likely too large and you'll have more glare than with a slightly
smaller
lense. It is also a good test to see if the binocular has serious
vinetting problems. Most binoculars do have some vinetting near the
edges of the field of view.
Dwight
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