Really BIG photos

[fritter]

I'm going to have a photo blown up on to a cavas size for home, to do that I need 10 xMP, how do they get photo's on the side of lorry's? What sort of camera and MP's do they need for that?

 

[cyclone]

You'd probably find that the pictures on the side of lorries are not very good quality really.
You only see them moving from a distance, people tend to look at photos in great detail, so paranoia sets in.

 

[Cezare]

it all depends on the size you want printed, the viewing distance and the quality of the print.

rough note: higher the quality the smaller the picture will be. (print terms)

everyday prints, e.g posters, magazines, require 300dpi

you'll find most large formats are printed at 72 - 150 dpi (huge wall prints, canvas)
though you'll find most of those lorry side displays are at 72dpi.

even then if you had a vector format print, you could go as big as you want without loosing quality

 

[reddeathdrinker]

The photos from my D50 (6MP) have been printed at 30" x 20" with no loss of quality. Any 6MP+ DSLR will produce images capable of being printed at wall-canvas size.

One of the reason pros use 20+ MP DSLRs, and the even higher MP digital MF backs on Hasselblads etc is so they can blow them up uber-huge

 

[CarlOgden]

I've just had a 150cm x 100cm print done at PosterXXL and that was from my 10D.

Regards,
Carl.

 

[TheBionicDan]

Something like Genuine Fractals or even Photoshops own inbuilt interpolation capability will do a good job of upscaling if your pics need it.