Originally posted by: Injury
Originally posted by: Anubis
so to print a photo qiality 20x30 i need a 50mp camera?
i think not
If you want it printed at 20x30 with no pixelation, blurriness, and sharp as it would be with film, then yeah. there IS a noticable difference between 150 dpi and 300 dpi.
Well, you're not going to get a super sharp 20x30 from a 35mm camera - and probably not from a professional medium format camera (60mm) either. You'd really need to use a land camera with 4x5" or even 10x8" film. Why do you think that pro photographers doing massive group photos (like university graduation photos) use such massive 'old-fashioned' cameras? Nothing can beat the resolution of a massive piece of film.
Modern 35mm digital sensors (like in Canon's 16.7 MP digicam) approach, or even exceed the quality of conventional medium format film cameras.
If you want higher still then you could buy a digital attachment ('back') for your medium format camera - these are available up to 22 MP. The major selling point of these sensors is that 16 MP is the 'magic' number needed for print publishing - at 16 MP you can print a double page spread at ''photographic' quality; for a fashion or fine art publication, any visible pixelation is unacceptable.
However, for massive enlargements this isn't really enough, so these professional sensors have a clever trick - they include micromotors which can move then sensor precisely 1/2 a pixel so that 2 exposures can be combined for double resolution.
