Re: [APML] OT: Nikon N90 vs N90s

[Joe Pedit <pedit@email.unc.edu>]

One of the nice features of the N90s is that its autofocus is sensitive 
enough for prime focus work at f/6.8.  I can focus on a bright star, 
bright planet, the edge of the moon, or the edge of the sun.  I am 
thinking of purchasing a digital SLR for next year's Venus transit of 
the Sun.  The N90s camera was introduced a decade ago so I would suspect 
that the autofocus sensors of the D100, 10D and 300D are better than 
that in the N90s.  Can anyone comment on the ability of these dSLRs' 
autofocus sensors working at f/6.8 for prime focus work?
Thanks,
Joe

Bert Katzung wrote:
> Hi Bobby:
> I assume you want to stay with Nikon for your sports shooting because you
> have those good Nikon lenses. If you can possibly stretch that budget for a
> D100 (the digital equivalent of the F100) I would go for it in a minute! I
> just bit the bullet and got a digital (Canon10D; quite similar to the Nikon
> D100) and among the (more or less) hidden advantages of the digital box is
> the ability to switch ISO speeds on a frame by frame basis. You can go from
> ISO 100 in one frame to ISO 1600 in the next and then back again. Quite an
> advantage when working with fast action in varying light situations. That
> plus the ability to evaluate your exposure immediately provide major
> improvements. You can see some of my daylight stuff with the new box at
> http://www.astronomy-images.com/day-images/California/greatwhiteegret-banking.htm
> and related bird pictures.
> Bert
> 
> Bert Katzung

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