Re: Digital lens question

[Bob Rosen <afterswift@xxxxxx>]

steves wrote:

> Normal lenses introduce light in a sort of cone shaped projection against
> the film plane, while digital lenses should and now do project the light in
> parallel almost a rectangular shaped prjoection that fall upon the chip.
>  
Friends, as I wonder at the Democrats, I also wonder where I am.

Is it digital that has caused us to see politicians in a new light?  
Once we leave behind the true trustworthyness of the field camera for 
something which makes its own interpretation, the slippery slope must be 
where we are heading.

I trust my Nikon, my 43 - 86mm lens and my own eye.  For as surely as 
35mm is the format that has been agreed on as closest to the eye, it 
gives me the truest interpretation of the field.

And now we hear that the very lenses we as photographers have placed our 
creative trust in have also been digitized.  Like the cones in our eyes, 
is not the cone of light from our lens also a fundamental fact of 
nature?  Or have those we trust become so digitized that we lose the 
truth of the lens?

Bob

> Steve Shapiro, Carmel, CA
> ----- Original Message -----
> From: <kpp@xxxxxxxxxx>
> To: "List for Photo/Imaging Educators - Professionals - Students"
> <photoforum@xxxxxxxxxxxxxxxxxxxxxx>
> Sent: Friday, August 20, 2004 9:04 AM
> Subject: Digital lens question
>
>
>  
>
> > well since almost everything now turns around digital here is something to
> >    
> sparkle some conversation...
>  
>
> > it regards the new series of lenses that ar fit for digital cameras...do
> >    
> they differ that much from the regular "film" lenses or are they branded
> that way?
>  
>
> > I can make 2 suppositions:
> > 1. the light beam is optimized for the smaller recording media size
> >    
> (sensor). If so, what are the tradeoffs when this lens is used in a
> compatible film camera?
>  
>
> > 2. are they branded "for digital" jsut because the have been changed to a
> >    
> focal length that equates the "film" regular value/range (IOW 17mm being a
> 28mm when used with a film camera)
>  
>
> > and more specific...
> > anyone has any commnets on the new Tamron SP AF28-75MM F/2.8 XR Di LD
> >    
> Aspherical (IF) lens...i am considering a future buy and use with film
> cameras...
>  
>
> > thanks beforehand, kostas
> >
> >
> >
> >    
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