Comments on: Binoculars!? http://www.123binocular.com/celestron-binoculars/binoculars Great binoculars from Swarovski, Barska, Nikon, Zeiss, Nikon, Meade, Celestron Sat, 31 Jul 2010 10:52:23 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: centretek666 http://www.123binocular.com/celestron-binoculars/binoculars/comment-page-1#comment-809 centretek666 Mon, 21 Jun 2010 10:31:59 +0000 http://www.123binocular.com/celestron-binoculars/binoculars#comment-809 Neither of these binoculars is suitable for astronomy. At and low light conditions your pupils open to about 7mm. If any binoculars provide an exit pupil of less than 7mm then you are wasting light AND you will have a lot of difficulty holding the image steady on your retina. The exit pupil size of binoculars is calculated by dividing the objective lens diameter by the magnification. 10 X 50 binoculars only give an exit pupil of 5 mm. 7 X 50 are fine with an EP of 7.14 mm. If you want higher power you must increase to objective lens size 10 X 70 15 X 105 Ex Navy binoculars of this size are sometimes available from Disposal stores.<br><b>References : </b><br> Neither of these binoculars is suitable for astronomy.
At and low light conditions your pupils open to about 7mm. If any binoculars provide an exit pupil of less than 7mm then you are wasting light AND you will have a lot of difficulty holding the image steady on your retina.
The exit pupil size of binoculars is calculated by dividing the objective lens diameter by the magnification.
10 X 50 binoculars only give an exit pupil of 5 mm.
7 X 50 are fine with an EP of 7.14 mm.
If you want higher power you must increase to objective lens size

10 X 70
15 X 105

Ex Navy binoculars of this size are sometimes available from Disposal stores.
References :

]]> By: kwilfort http://www.123binocular.com/celestron-binoculars/binoculars/comment-page-1#comment-808 kwilfort Mon, 21 Jun 2010 10:18:59 +0000 http://www.123binocular.com/celestron-binoculars/binoculars#comment-808 Binoculars are great for casual stargazing, two eyes are better than one. 10x50 is a decent size, anything bigger and you need a tripod as they will be too heavy to hold steady. Obviously for close up views such as spliting close doubles, and viewing star clusters, nebulae etc a telescope would be better. I'd go with the Orion set as they have a wider field of view.<br><b>References : </b><br> Binoculars are great for casual stargazing, two eyes are better than one. 10×50 is a decent size, anything bigger and you need a tripod as they will be too heavy to hold steady. Obviously for close up views such as spliting close doubles, and viewing star clusters, nebulae etc a telescope would be better. I’d go with the Orion set as they have a wider field of view.
References :

]]> By: MooseBoys http://www.123binocular.com/celestron-binoculars/binoculars/comment-page-1#comment-807 MooseBoys Mon, 21 Jun 2010 09:48:59 +0000 http://www.123binocular.com/celestron-binoculars/binoculars#comment-807 Between the two, I would go with the Orion. They are both virtually the same specs, but the Orion has about 15% wider field of view with the same magnification, meaning you can see more of your target with the same magnification. I wouldn't reccomend binoculars for stargazing, however, if that was your plan. Just go with a telescope.<br><b>References : </b><br> Between the two, I would go with the Orion. They are both virtually the same specs, but the Orion has about 15% wider field of view with the same magnification, meaning you can see more of your target with the same magnification.
I wouldn’t reccomend binoculars for stargazing, however, if that was your plan. Just go with a telescope.
References :

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