from johrt@xxxxxxx RE: 50/90 lenses

[P3D Bob Wier <wier@xxxxxxxxxxxxxxxxx>]

The following appeared to get diverted off, so here it is.
If it's a dup, thousands of apologies...

--BW

|To: photo-3d@xxxxxxxxxxxxxxxxxxxxxxxx
|Subject: Re: 50s vs. 90s lenses
|References: <199710080327.XAA00692@xxxxxxxxxxxxxxxxxxxxxx>
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|> Also it's not fare to compare a zoom lens to a fixed focal lens. Can
|> the experts elaborate on comparing a good quality '90s fixed lens
|> vs the '50s lens?
|
|I am far from an expert, but I have worked with some.
|
|At midrange to highend, the 90's lens will be made from superior optical
|materials and use a more sophisticated design than the lens from the
|fifties.  BUT, the 90s lens is also more likely to offer a wider
|aperture setting, which, if you don't need it, can contribute to reduced
|contrast at reduced aperture settings.
|
|> Gabriel who doesn't mind altering reality, but would like to know,
|> what is reality? ;-)
|
|Reality is approximated by collecting and correcting the image in a
|manner consistant with scientific and engineering principles.  However,
|artists do not necessarily use such an approach, since art has creative
|freedoms not appropriate for scientific or engineering work.
|
|Do keep in mind Picasso's standard.
|
|Any artist having mastery of their medium can depict a cow that looks
|like a cow.
|
|I also agree with if you want a snapshot, take a snapshot.  ie. this is
|a hobby and your are not required to conform to anyones standards.
|
|My two bits, please no flames.
|
|Bias:  I am an engineer who works with scientists <grin>
|
|Regards,
|
|--
|
|John Ohrt * Toronto * ON * Canada
|



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