WB alternative to Expodisc.

GageFX133521

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I learned this tidbit on a Canon forum somewhere. I think it was the one post that wasnt about a lens or frontfocus.

At any rate, many of you may have heard of the "Expodisc". http://www.expodisc.com/

They cost between $50-60.

I made mine for $17 plus one white Kleenex tissue, although I'm sure other brands will work as well.

Here are the results: (These are with 10D settings. The custom WB will work just as well with the E-xx, your auto setting may work better though.)

This was shot of a white wall, white shelves, and slightly grey/off white speakers. The matte on the lower frame is also white.

First shot is the custom setting shot, the others are self explanatory (I think).











As you can see, the custom setting is right on. The incandescent shot comes close, but auto and fluorescent are way off.

This will work just as well on the E-xx.

Here's how it's made.

Buy a Quantum QF64 Diffusing UV Filter Kit - about $17 from any camera store. It comes with two plastic discs and a plastic ring that these discs fit into. Take a white tissue and sandwhich it between the two plastic discs. Snap the discs into the ring. Cut excess tissue with scissors. Tada.

Another thing, the largest Expodisc is 72mm. The fancy-dancy Quantum WB doohickey is about 120mm so it is large enough to work with any size lens.

All you do is hold the "f-d Q WB dh" up to the lens, aim the camera at the light source and take your WB set exposure. That's it.

Just an E-xx pertinant tidbit from a former E-xxer.

-GageFX
 
I know this isnt 100% on. It is close. I have done a comparison between my Quantum disc and a white card and the Quantumdisc is closer. Not EXACT, but close. A much easier and less image damaging fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
 
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
It looks good to me, but I have a silly question about the expo disk. It looks to me like the it's made from the plastic that is used to cover flourescent fixtures. Would a piece of that work as well? I've got a ton of the stuff from when we built the house.

Maybe I'll try it and see.

Chris
 
Neat. and very effective. Thanks.

But....do you really have that much trouble with manual (or even auto for that matter) WB? Either usually works pretty much dead on for me, manual especially if I'm using halogen lights or whatever. It's never been that off for me to worry about it.
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/ Minolta HTsi+
PBase supporter
 
Thanks Gage. See, that's why we need to keep you around!!!!!

Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
 
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/ Minolta HTsi+
PBase supporter
 
Buy a tube of pringles crisps, eat the crisps but keep the plastic top.
Place the plastic top over the lense and point at the light source to
take the WB measurement.
Works fine for me......

Cedric

http://www.picorama.com
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
 
Are peope really having that hard a time manually adjusting with just a white card???
Cedric

http://www.picorama.com
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/ Minolta HTsi+
PBase supporter
 
No probs with a white card, but why carry one when you can slip
one of these in your top pocket, and point directly at the light source
knowing that the coverage is full frame.


Cedric

http://www.picorama.com
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
 
But having to eat a can of those things every time you want to check white balance could really screw up your cholesterol! ;-)
No probs with a white card, but why carry one when you can slip
one of these in your top pocket, and point directly at the light
source
knowing that the coverage is full frame.

 
????

Beats me. I'm not sure what it is. It might work.

Vague enough for you? :)

-GageFX
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
It looks good to me, but I have a silly question about the expo
disk. It looks to me like the it's made from the plastic that is
used to cover flourescent fixtures. Would a piece of that work as
well? I've got a ton of the stuff from when we built the house.

Maybe I'll try it and see.

Chris
 
Manual? Eh?

-GageFX
Neat. and very effective. Thanks.
But....do you really have that much trouble with manual (or even
auto for that matter) WB? Either usually works pretty much dead on
for me, manual especially if I'm using halogen lights or whatever.
It's never been that off for me to worry about it.
 
I just happen to have a pringle lid right next to me. A half eaten, 8 month old can of Pringles. Lets see how it works...

Images are self explanatory. (I have too much ambient light right now to shoot the same thing as last night so I shot incandescent in the washroom.









The Pringles lid did very well, but the QuantumDisc was better. I dont know if the uneveness of the Pringles lid played a part, but the RGB numbers are tighter with the Qdisc. I would say the Pringles lid is better than nothing - almost as good as the Qdisc.

-GageFX
Cedric

http://www.picorama.com
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
 
It's not a matter of having a hard time, it's a matter of the process being acurate.

http://www.expodisc.com/faq/faq.html#whyownanexpodisc

And now that I read that, my disc is working just as good as the Expodisc. I'm within their 3% accuracy.

But like Cedric said below, I'm sure, Why carry a card around. And a card small enough to carry would certainly be hard to shoot keeping it far enough from the lens to get good light and still fill the frame fit it.

Me, I was using a large piece of foamcore that was certanly large enough, but it didnt give as good of results as the Qdisc, or Pringles lid, for that matter.

-GageFX
Cedric

http://www.picorama.com
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
 
BTW

Just a note.

-GageFX

Cedric

http://www.picorama.com
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
 
Glad to see those results GageFX, just did a quick test myself with
the Pringles cap, first auto,second custom balance with pringles




Just a note.

-GageFX

Cedric

http://www.picorama.com
Cheers, Bill
I know this isnt 100% on. It is close. I have done a comparison
between my Quantum disc and a white card and the Quantumdisc is
closer. Not EXACT, but close. A much easier and less image damaging
fix than a far off setting.

If anyone has a better solution I am all ears.

-GageFX
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--

Oly E-20, Oly 4040Z, FL-40 pbase supporter
http://www.pbase.com/papa51
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/
Minolta HTsi+
PBase supporter
 
Manual, meaning setting with a white card.

I still find carrying a white card easier to carry around, it just slips under the foam of my camera case inside. Never had a problem filling the frame with it. The Pringles lid is a cool idea though and obviously works well, and is admittedly probably quite a bit more durable than a card.
-GageFX
Neat. and very effective. Thanks.
But....do you really have that much trouble with manual (or even
auto for that matter) WB? Either usually works pretty much dead on
for me, manual especially if I'm using halogen lights or whatever.
It's never been that off for me to worry about it.
--
(DC's)/ Oly E20, Kodak DC4800's, (DV)/ Canon GL1, ZR25,(35mm)/ Minolta HTsi+
PBase supporter
 

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