[rollei_list] Re: OT: B&W Filters in digitial potography

There is a difference between filtering light before it hits and
sensor and filtering light after, regardless of what the photoshop
people would have you believe...


Eric Goldstein

--

On Mon, Jul 12, 2010 at 6:11 PM, Laurence Cuffe <cuffe@xxxxxxx> wrote:
>
> On 12 Jul, 2010,at 05:17 PM, Marc James Small <marcsmall@xxxxxxxxxxx> wrote:
>
> At 05:04 PM 7/12/2010, Laurence Cuffe wrote:
>>Frank, This is almost true. The only practical
>>exception I can think of is using an IR filter
>>on a digital camera where the selective
>>transmision of the filter will combine with the
>>response curve of the red sensor to produce
>>something which cannot be reproduced by post procesing of the digital data.
>>In a theoretical sense using narrow band
>>transmision filters might also give a result
>>which could not be reproduced in photoshop, but
>>I am not aware of any pictorial aplications of this tecnique.
>
> Larry
>
> What about a Pola-Screen? I can not find a
> reference to polarization in the IB for my camera.
>
> Marc
>
> Yes good point. Thats another glaring exception to the notion that it can
> all be done in Photoshop.
> All the best
> Larry
>
>
>
> msmall@xxxxxxxxxxxx
> Cha robh bàs fir gun ghràs fir!
>
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