Re: [APML] Choosing a 300mm lens...

["Jim Barclay - Australian Telescopes n Education Director." <cosmos@big.net.au>]

Eric..

I have a Nikon 300/4 and its sharp edge to edge wide open. Mount it solid
and the Universe is yours!   Go for it mate..and enjoy!

Jim
Director:  NTQO / SRO and  Telescopes In Education (Australia)
www.eese.bee.qut.edu.au/tie


----- Original Message -----
From: "eric raeburn" <eraeburn@pacbell.net>
To: <astro-photo@seds.org>
Sent: Friday, May 31, 2002 8:03 PM
Subject: [APML] Choosing a 300mm lens...


> I'm in the market for a 300mm lens for a Nikon camera body.  The f/2.8
> is not a possibility at this time, so I'm planning on the f/4, but would
> like to get people's opinions of some alternatives.
>
> The requirements: sharp images free of chromatic abberation; a tiny bit
> of degradation in the corners MAY be acceptable if it can be removed
> with only minimal cropping; a rotating mounting collar is highly
> desirable.
>
> Comments on these alternative choices (or anything else relevant) would
> be appreciated:
> 1. Off brands like Tokina, Tamron, Sigma.
> 2. Nikon zoom lenses (70-300 or 70-400).  These are f/5.6 at max f.l.
>    Is that way too slow?  Are there other problems with zooms?
>
> Note that this inquiry is primarily in regard to optics rather than
> the mechanics of mounting; I'm aware that these things are subject to
> flexure.
>
> Thanks,
> -Eric Raeburn
>
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