Re: [APML]: M45 scanned with Nikon LS1000

[Chris Vedeler <cvedeler@ix.netcom.com>]

Thanks Philip!

Thanks for the scanning advice too.  The scanner did a pretty nice job other
than showing all the scratches, and since I have access to it at work, I don't
have to lay out a ton of money to buy my own (Just an $89 Zip Drive).  I can
save my pennies for a 500 mm f/5.6 Mamiya medium format lens I've had my eye
on... :-)

Yes that shot was taken with the GEG with the lens forward position.  Whether
it is truly f/5.5 I don't know, but that is what they advertise.  I'm pretty
happy with the small amount of vignetting it produces.  In fact looking at the
negative the vignetting is hardly detectable.

I did not use any filters with that shot.  I must admit that the original
negative did not show as much blue saturation.  I upped the blue by about 15%
in Photoshop.  Nothing was done in Photoshop to reduce the vignetting however,
and it has only been cropped about 5% from the full negative.

Chris Vedeler
http://www.isomedia.com/homes/cvedeler/space.htm
Tucson, AZ


Philip Perkins wrote:

>
> Chris,
>
> This is a nice photo of M45!  I found the same problem with negative
> defects using the Super Coolscan. It's due to the light source - that fact
> that it uses LEDs which are much nearer to point sources than the diffuse
> light source used on competitive scanners. It has the effect of greatly
> amplifying scratches, even those that are barely visible under normal close
> inspection. As far as I know there is no actual cure but the effect can be
> lessened by laying a strip of opaque material on top of the negative during
> prescan and then removing it for the final scan without changing any
> settings. This has the effect of greatly lowering the contrast and hence
> the degree to which negative defects are visible.
>
> Regarding the photo, you said that it is taken at f/5.5. I am interested if
> this was at Lumicon's stated f/5.5 (with the lens in the forward position).
> If so, your image shows remarkably little vignetting. I have only been able
> to achieve such low vignetting by using the DS filter with the GEG in this
> mode. However the DS filter attenuates the blue response so I have been in
> a 'Catch 22' regarding how to photograph M45 with the GEG. So my next
> question is: did you also use a DS filter?  If so, the blue response looks
> better than I would expect.
>
> Thanks  --Philip
> -------
> Philip Perkins  --  philip@astrocruise.com
> 51 27'N 1 36'W  --  Wiltshire, UK
> 43 54'N 5 32'E  --  Luberon, France
> Astrocruise     --  http://www.astrocruise.com