I am brand-new to photography, having jumped right in by purchasing
the 300D. Clueless about the different kinds of cameras, I saw some
great-looking b&w portrait photographs on a restaurant wall, and
told my friend that "those are the kinds of photos I want to take".
Then he told me that those photos could only have been taken from a
medium-format camera; a digital camera, or at least, the one I
have, can't take pictures with that kind of detail and quality.
But can it be done?
Of course you're going to get varying opinions, but in generaly you
can only blow up so far from the original image before the picture
quality is unacceptable. You can certainly take gorgeous black and
white portraits and you can certainly print them out larger than
4x6 and have them look great. However, if you were looking at
portraits whose size was measured in feet instead of inches, your
300, or in fact 99% of the digital cameras today, just doesn't cut
it
It's purely physical as well I think. The larger the starting
image size, the larger the blow up you can get before it becomes
too soft/pixelated/bad looking to be acceptable. Most DSLRs have
an APS sized sensors, which is smaller than a 35mm sensor (see this
link for a graphical example:
http://www.photo.net/equipment/digital/sensorsize/ ).
Now of course, you can argue that DSLR sensors can pack pixels more
tighly together, the fovion chip is really 3 chips in one, etc etc.
It all comes down to the fact that if you have a
negative that's
2.5x2.5cm or 6x4.5cm (or 6x6 or 6x7) you're going to be able to
blow it up bigger than something that's coming from the 16.7X23.4mm
that is the sensor size in a DSLR (based on sizes quoted at
http://www.nikonians.org/html/resources/jrp_faq/jrp_faq_what_camera/faq_what_camera_aps.html ).
Now that all said, I've printed out some great pics from a 3mp
camera at 8x10, and have read that you can do up to 11x13 blow ups
from a dslr
(
http://www.leica-camera.com/discus_e/messages/3/54598.html?1079945390 ). Remember that the sharper the pic, the bigger the blow up, so use a tripod, good glass, etc.
If you're interested in getting into medium format, check out a
good page at
http://www.cameras.co.uk/html/medium-format-cameras.cfm Of course,
you don't get the perks of digital
However, I just read that pentax will be releaseing a 6x4.5cm
digital soon
(
http://www.pentaximaging.com/footer/news_media_article?ArticleId=6458800 ), so you can do digital medium format! Of course, it's going to be a
wee bit pricier than a rebel, DS, or whatnot
Whew! Long post, hope it helped.