why is it?

Archived from groups: rec.photo.digital (More info?)

"tbm" <ialwaysgetresults@ntlworld.com> wrote in message
news:fRcLd.1112$vC.648@newsfe3-win.ntli.net...
> that with pns digi cams they can equip them with fast lenses like f2.8.
> yet when one buy's a digi slr it cost's an arm and a leg for
> the equivalent. one wonders if one is going the right direction when
> getting involved with slr digi cams....any thoughts girlsnboys?
> rgds to all from TBM...

Small sensors, rear element of the lens closer to the sensor, lower consumer
expectations, etc.

Archived from groups: rec.photo.digital (More info?)

On Sun, 30 Jan 2005 22:03:55 GMT, "tbm"
<ialwaysgetresults@ntlworld.com> wrote:

>that with pns digi cams they can equip them with fast lenses like f2.8. yet when one buy's a digi slr it cost's an arm and a leg for
>the equivalent. one wonders if one is going the right direction when getting involved with slr digi cams....any thoughts girlsnboys?
>rgds to all from TBM...



Smaller sensors on the P & S models means that
the lenses need to cover a smaller image circle.

For similar reasons, lenses for MF cost more
than comparable lenses for 35 mm, and lenses
for LF cost more still.

I mean... I have a 90 mm f/8 lens that I
paid $700 for. This would be ridiculous
for a lens for a 35 mm SLR body. But the
lens I'm describing is a wide-angle for
a 4x5 camera, with a very large image
circle (225 mm.)


rafe b.
http://www.terrapinphoto.com

Archived from groups: rec.photo.digital (More info?)

"tbm" <ialwaysgetresults@ntlworld.com> wrote in message
news:fRcLd.1112$vC.648@newsfe3-win.ntli.net...
> that with pns digi cams they can equip them with fast lenses like f2.8.
> yet when one buy's a digi slr it cost's an arm and a leg for
> the equivalent. one wonders if one is going the right direction when
> getting involved with slr digi cams....any thoughts girlsnboys?
> rgds to all from TBM...
>

Look at the size of SLR lenses...that's a lot more glass than the small
digicams to make with a large aperture.

Mark