printing, photo labs

for printing:
Digit[all], Madach ter 4 (near Deak Ferenc ter, map) - not cheap but good quality prints, scans etc.
http://www.digit-all.hu/

Photo labs:

Digilab (fast and good. digital photos, dias, ... prints up to A4)
Vadász utca 9 (map)
www.digilabfoto.hu

CPD - colour photo digital (very professional. they even do dias from digital images, Lamda prints up 70x100, mounting etc)
Madách Imre út 3, 1075 Budapest (map)
http://wcs.oisz.hu/45899/color-photo-digital-kft.html

Elinfo (small. but they do digital photos, scans and plots)
Kiss Josef street (map)
http://www.elinfo.hu/

other places
Profo (Bathory utca)
Syres (Rósza utca) - for medium format film

just came across this site which might also be useful
http://en.info-budapest.net/cegek/list/24/foto