Expo Disc

oeyvind · 19th January 2003

Have anyone tried Expo Disc?

http://www.expodisc.com/

http://www.digitalfocus.net/sections...Expodisc_1.htm

StreetShooter · 19th January 2003

I've tried various alternatives like a Pringles cap, tupperware, styrofoam cups. Compared the white balance to that of a grey card.

The broad styrofoam cup used for packing soya-bean curd is the best. In fact, I would say its colour balance beats the grey card!

oeyvind · 19th January 2003

you mean shoot the styrofoam to get the white balance?

StreetShooter · 19th January 2003

I mean use the cup to cover the lens and shoot the reference image for using Custom White Balance. Try it! (Use Auto White Balance when shooting the reference image).

007 · 19th January 2003

Quote:

Originally posted by StreetShooter
I've tried various alternatives like a Pringles cap, tupperware, styrofoam cups. Compared the white balance to that of a grey card.

The broad styrofoam cup used for packing soya-bean curd is the best. In fact, I would say its colour balance beats the grey card!

but you cover the camera lens using the cup, right? in that case, how the camera going to calibrate the white balance close to the actual scene's?white balance preset means that calibrate the white balance near to the current lightning conditions, right?

StreetShooter · 19th January 2003

Yes, there is SOME light coming THROUGH the styrofoam, and it is this light which is used to calibrate the white balance.

oeyvind · 19th January 2003

interesting... thanks for sharing this tip, will give it a try.

007 · 29th January 2003

Quote:

Originally posted by StreetShooter
Yes, there is SOME light coming THROUGH the styrofoam, and it is this light which is used to calibrate the white balance.

thanks! I will use this method again! Yeah hoo hoo!!!

(*again = previously I just measure calibrated using white wall, but later I found that it was not a proper method. a proper method will be using expo disc or paper (kodak?). then I gave up. Now I found a good solution!!! which save me the trouble to get the disc or paper!)

StreetShooter · 29th January 2003

Anyone got results to match mine?

Before (AWB):

After (CWB):

19th January 2003	#1
oeyvind Senior Member Join Date: Feb 2002 Posts: 3,556	Expo Disc Have anyone tried Expo Disc? http://www.expodisc.com/ http://www.digitalfocus.net/sections...Expodisc_1.htm __________________ flickr

19th January 2003	#3
oeyvind Senior Member Join Date: Feb 2002 Posts: 3,556	you mean shoot the styrofoam to get the white balance? __________________ flickr

19th January 2003	#7
oeyvind Senior Member Join Date: Feb 2002 Posts: 3,556	interesting... thanks for sharing this tip, will give it a try. __________________ flickr

19th January 2003	#2
StreetShooter Moderator Join Date: Jan 2002 Location: Katong Posts: 4,702	I've tried various alternatives like a Pringles cap, tupperware, styrofoam cups. Compared the white balance to that of a grey card. The broad styrofoam cup used for packing soya-bean curd is the best. In fact, I would say its colour balance beats the grey card!

29th January 2003	#9
StreetShooter Moderator Join Date: Jan 2002 Location: Katong Posts: 4,702	Anyone got results to match mine? Before (AWB): After (CWB):