Digital BW, The Print

Anthony G. Atkielski thinks:

 
> Tom Baker writes:
> 
>> Would you provide an example of a b&w image that could only be
>> captured with b&w?  Most of us would like to see such an example.
> 
> I guess you missed my explanation about the narrowband yellow filter.
>

I didn't _miss_ anything. I don't believe you know what you are talking
about.
 
> Shoot a scene in straight B&W with a narrowband yellow filter.  The
> result will be impossible to duplicate with any conversion of RGB to
> B&W, for most scenes.

Please post to your web site:

http://www.atkielski.com/inlink.php?/main/Donations.html

examples to prove your statement above.


> More obvious examples can be given.  You can't get infrared B&W from any
> conversion of RGB, nor can you get UV from RGB conversion.  The reason
> for this is the same as indicated above.

http://www.fredmiranda.com/shopping/DI
http://www.nickgallery.com/web_pages/technical%207.htm
http://www.rangefindermag.com/magazine/archives/Feb03/infrared.tml
http://www.cliffshade.com/dpfwiw/ir.htm
http://www.pibweb.com/ross/IR2.htm
http://www.echeng.com/photo/infrared/

No, YOU can't get IR from RGB... people who actually have experience do it
all the time.

Jon

Jon writes:

> I didn't _miss_ anything. I don't believe you know what
> you are talking about.

It's best to evaluate arguments on their own merit, rather than on the
basis of preexisting beliefs, IMO.

> Please post to your web site:
>
> http://www.atkielski.com/inlink.php?/main/Donations.html
>
> examples to prove your statement above.

I don't have any narrowband yellow filters.  In fact, I never use
filters at all for original image capture, except for UV filters (and
that is more for protection of the lenses than for any other purpose).

> No, YOU can't get IR from RGB... people who actually have experience do it
> all the time.

Nobody can do the impossible.

Anthony G. Atkielski believes:

> Jon writes:
> 
>> I didn't _miss_ anything. I don't believe you know what
>> you are talking about.
> 
> It's best to evaluate arguments on their own merit, rather than on the
> basis of preexisting beliefs, IMO.
>

Anthony's evasive maneuver #1.

>> Please post to your web site:
>> 
>> http://www.atkielski.com/inlink.php?/main/Donations.html
>> 
>> examples to prove your statement above.
> 
> I don't have any narrowband yellow filters.

I know you don't. Just like you don't have a B/W inkjet.

 In fact, I never use
> filters at all for original image capture, except for UV filters (and
> that is more for protection of the lenses than for any other purpose).
> 
>> No, YOU can't get IR from RGB... people who actually have experience do it
>> all the time.
> 
> Nobody can do the impossible.

Fortunately, your beliefs are safe in your head--however, their bearing on
the world is irrelevant.

Jon