Apache-Talk @lexa.ru 

Inet-Admins @info.east.ru 

Filmscanners @halftone.co.uk 

Security-alerts @yandex-team.ru 

nginx-ru @sysoev.ru 

   


   


   















      :: Filmscanners
Filmscanners mailing list archive (filmscanners@halftone.co.uk)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[filmscanners] Re: Nikon Supercoolscan 5000 ED



I've had the experience of trying to shield differential amplifiers within a
faraday cage of a very soft iron (solid) shield. I learned that even with
even with such expensive shielding and perfect ground,  there are limits to
what you can do - motors on another floor induced milivolt interference
within very good Tektronix physiological amplifiers which were fully
isolated from AC.  I don't think that any room with functioning computers
and monitors could ever be so quiet that a 16 bit converter would be useful,
and I have my doubts about a 14 bit converter.  Units with such converters
may be better than lesser units, but I suspect the improvement has to do
with other factors than the bit depth.

Brad (who is still at 12 bit)


On 6/6/05 8:03, "Alex Z" <alexzfoto@yahoo.com> wrote:

> Yes, Bill, all that is correct theoretically, however noise floor
> issues may play a bad role in this respect. In order to aproach to a
> full 16-bit potential, Nikon has to warrant by hardware design noise to
> be kept very low, otherwise it will "eat up" all the extra-bit benefit.
>
> I have no LS-50 neither LS-5000, still using my "oldy" LS-40, but
> frankly I doubt Nikon has coped so well with this issues to provide a
> real 16-bit advantage over their 12/14bit machines . Perhaps they
> managed to squiz about effective 13-14 bit, but extremely quite (from
> noise standpoint) hardware design is required in order to enjoy full
> 16-bit performance.
>
> Regards, Alex
>
> ---  <wbgilloolyjr@charter.net> wrote:
>
>> 16-bit vs 12-bit does not necessarily mean greater dynamic range,
>> though
>> the LS-5000 has more than the V (not enough to be explained by the
>> extra
>> bits).  Mostly what greater bit-depth gives you is finer gradations
>> between steps.  12-bits gives you 4096 steps from black to white,
>> 16-bit
>> gives you 65536 steps (so each 12-bit step is represented by 16
>> 16-bit
>> steps.  Finer gradation of tones means that you'll get less
>> posterization.
>>
>> Mr. Bill
>>
>>
>> Berry Ives wrote:
>>>
>>> I don't need high volume capability, so the LS-50 is fine for me.
>> I don't
>>> know if the 16-bit vs 12-bit depth makes much difference in
>> practice, but
>>> theoretically it provides greater potential for dynamic range to be
>>> recorded.  Maybe someone else would care to say more about this.
>>
>>
> ------------------------------------------------------------------------------
> ----------
>> Unsubscribe by mail to listserver@halftone.co.uk, with 'unsubscribe
>> filmscanners'
>> or 'unsubscribe filmscanners_digest' (as appropriate) in the message
>> title or body
>>
>
>
>
>
> __________________________________
> Discover Yahoo!
> Get on-the-go sports scores, stock quotes, news and more. Check it out!
> http://discover.yahoo.com/mobile.html
>
> ------------------------------------------------------------------------------
> ----------
> Unsubscribe by mail to listserver@halftone.co.uk, with 'unsubscribe
> filmscanners'
> or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or
> body

----------------------------------------------------------------------------------------
Unsubscribe by mail to listserver@halftone.co.uk, with 'unsubscribe 
filmscanners'
or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or 
body



 




Copyright © Lexa Software, 1996-2009.