On Wed, 17 Sep 2008 08:53:32 -0700, toucky70 wrote:

Hi everybody,
I know is two very different concepts but maybe explaining my doubt
someone could open up my mind...

I've never had a MF camera.
I have an important photographic project to carry on consisting in
portraits of interiors with no artificial lights.

By "...no artificial lights...," I'm assuming you mean lighting that you
would bring to supplement the existing ambient light.

the first part of these pictures were made with a Digital Nikon D70,
this year I have bought a D300 lens 12-24 (18-35 35mm)

Some experts photographs who saw this pictures suggest me to use a MF,
specifically MAMIYA 7 with 43 lens.

As this choice would be very expansive either for the camera costs, the
negatives and scans shoud I afford it? The result have to be
professional. Could someone give an opinion?

Whether you should go with the Mamiya 7 or stay with the D300 entirely
depends on what the end use of the photographs will be. Web, brochures,
publication in magazines, prints no bigger than 11x14 inches or so? The
D300 is more than sufficient. For very large prints? The Mamiya has the
advantage, but only if the prints are made directly from a negative and
not from scanning a transparency first.

The primary advantage of digital these days compared to film is that
digital images have considerably more dynamic range making them far
easier to produce good images under bad or marginal lighting conditions.
Plus, the added ability to adjust contrast, saturation, sharpness, etc.
"in camera" or post production. To do the same with a film image,
whether printed directly or scanned, would require considerable added
production time and a person who knew what they were doing, and you still
might not get a satisfactory image.

If you really think that the D300 images just aren't suitable, I think
you'd be better off getting a full frame digital like the newly announced
21 megapixel Canon 5D Mark II. Even with a suitable lens, the
combination would be cheaper (and much more versatile) than a Mamiya 7
with a 43mm.

Stef