AW: [APML] Film Scanability

[a.roerig@t-online.de (Andreas Roerig)]

> -----Ursprüngliche Nachricht-----
> Von:	Jason Ware [SMTP:jasonw@galaxyphoto.com]
> Gesendet am:	Samstag, 23. Februar 2002 18:59
> An:	astro-photo@seds.org
> Betreff:	[APML] Film Scanability
>

Dear Jason,

>
> OK, is Scanability a word? Anyway, Upon starting to

Well, English is not my native language but at least I would be able to 
find a German translation for it ;-)

> play around with scanning negatives I discovered the
> following...
>
> 1) A scan of a negative seems to be grainier than
>    I would expect. This is when comparing to a
>    conventional print from the same negative.
>
> 2) Some films are worse than others, even at the
>    same ISO value.
>
> I am comparing to prints made with a dicroic enlarger,
> I have not tried a condenser enlarger on the same
> negative (just sold mine).
>
> In my reading I have found that some people attribute
> this to grain aliasing. I also found than some films
> are reported to be better than others for scanning
> (slide film being the best).
>
> What have others observed?

My observations are very similar to yours. When scanning negatives (e.g. 
Royal Gold 400) with my Minolta Scan Dual II I always get a lot of grain. 
This is worse when the negative is not exposed to the sky limit. The higher 
the density of the negative the better the results. Best results I get with 
slide film.

Regards
   Andreas

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