Re: [APML]: Pro Kodac 400

[Chuck Vaughn <aa6g@aa6g.org>]

Jerry Lodriguss wrote:
 
> >Now let's see....based on Tony's exposure times in the Astronomy
> >article using my 350-f/2.8 lens that means 3 minute exposures and with
> >the lens at 500-f/4 that's still only 6 minutes
> 
> I'll be SHOCKED if these exposures hold up.  No way... too short, even
> hypered.  I have to go 7.5 min at f/2.8 on hypered Fuji 800!  Sumpum funny
> gone on here.
> 
Actually I went back and read the article again and I was using the
numbers
for his 7"-f/7 so I'll revise that to 5 minutes at f/2.8 and 10 minutes
at
f/4, still very short. Tony said longer than 30 minutes at f/7 had too
much sky fog.

If anything I would think the film should be faster for shorter
exposures.
Tony did mention the film being more efficient than others. Is it twice
as efficient than other films? I don't know. Those two 20 minute
exposures
at f/5.6 recorded quite a bit of faint nebulosity and I know that the
Rho
Ophiuchi region is rather faint.

It would be nice if we were all pleasantly shocked!

Chuck
<aa6g@aa6g.org>