[canthony]

請問如果曬4R相
應該效到什麼resolution
File size 應該多大?
800x600, 900dpi 可以了嗎?
怎樣才是最好??
Thank you

[Philippe]

1800 x 1200, 300dpi.

[tedted]

之前有人post過條算式出黎, 但我搵唔番, 有冇人可以再post 多次呢?

[Philippe]

街外晒相係用300dpi
3R 3.5”x 5”要 1050x1500
4R 4”x 6”要 1200x1800
5R 5”x 7”要 1500x2100
8R 8”x 10”要 2400x3000
12R 8”x 12”要 2400x3600

[SAM LAM]

REVISED

I use 300D to take 6MP photo, want to crop my photo to make it better.
If I want to crop photo in 3:2 ratio to print 4R photo, Which figures should I use? I want to reserve largest pixels so that I may print larger photo later. Fotomax tell me any thing better than 300dpi is good, is it true?

Are my calculation correct? e.g. Photoimpact X : Y = 1800 X 1200
300dpi 1800 x 1200 = 2.160MP
350dpi 2100 x 1400 = 2.940MP
400dpi 2400 x 1600 = 3.840MP
450dpi 2700 x 1800 = 4.860MP
500dpi 3000 x 2000 = 6MP

Could anyone suggest any figures? Any simple calculations?