Focus and resolution charts - where to buy online

[Fordo]

as above really - looking for largish focus/ resolution, A3 size or bigger, but no idea where to get them online.

the only company I know of are dsc labs, but theyre based in america: http://www.dsclabs.com/resolution.htm

[4hero]

have you tried google for some?

[Fordo]

printing my own isnt good enough- im reliant on the resolution of my printer. I need a really high contrast, high res chart in case i ever need to compare the frequency responses from different cameras

Plus, i need A3 or larger, which i cant print. Also need to use it for really accurate white balancing, the white of my paper might not be true 'white'. A4 is just too small for setting up back focus on really wide angle lenses

I need a large, preferably hard backed A3 focus chart, to use for setting up back focus on broadcast lenses, as well as checking resolution and checking for colour alignment and electronic flare, so i can work out the sweet spots of each lens at different focal lengths.

At the moment ive got a paper A3 one mounted on some plywood board, but its got so tatty that it looks really unprofessional

Edited by Fordo on Wednesday 4th March 09:00

[VxDuncan]

Just had a quick look through the edmunds optics catalogue - they ain't cheap though... (but are ISO std.)
http://www.edmundoptics.com/onlinecatalog/displayp...

[VxDuncan]

Alternatively a google for "ISO-12223" should bring up some results.

[Simpo Two]

Fordo said:

to use for setting up back focus on broadcast lenses

Pleased to hear that - so many TV cameramen these days prefer focusing on the background than the subject!