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Article #3697

Re: are fixed focus binoc's any good for astronomy??

#3697
From: Tony Arnerich
Date: Fri, 08 Jan 1993 21:18
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timothy@ccu1.aukuni.ac.nz (Tim Bates) writes:

> I am looking at purchasing a pair of binoculas (please pardon the pun).
> My question is, are fixed focus binoculars any use for star gazing. The
> particular pair Iam thinking of are Jason 10x50s. the never focus design
> appeals particularly becasue it appears to be very robust as well as
> easy to use.
> Timothy Bates

Since the intended use is terrestrial, the focal point they are fixed on
is rather close by astronomical standards. They could be "fixed out-of-focus"
for your use. Also, testing whether you can focus on a very distant subject
*during daytime* might not be a good test of whether you can do this with 
an enlarged eye pupil. 

I concur with the other response, which suggests that these type of binoculars
could be poorly made - they do seem to be at the low end of the price spectrum.
I've also never seen an optical instrument from Jason that has impressed me.
This paragraph is 100% opinion.

As a guess, I'd say that these are a very poor risk, unless you can return
them for a full refund.
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From: tonya@hpldsla.sid.hp.com (Tony Arnerich)
Date: Fri, 8 Jan 1993 21:18:32 GMT
Subject: Re: are fixed focus binoc's any good for astronomy??
Message-ID: <123470013@hpldsla.sid.hp.com>
Organization: HP Scientific Instruments Division - Palo Alto, CA
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Newsgroups: sci.astro
References: <1993Jan7.090516.70@ccu1.aukuni.ac.nz>
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