ExpoDisc Digital White Balance EXPOD58 - Filter - color correction - 58 mm

Other products by ExpoDisc

Product Details

• Item Weight: 5.6 ounces
• Shipping Weight: 8 ounces (View shipping rates and policies)
• ASIN: B0002GFORQ
• Item model number: EXPOD58
• Average Customer Review: 4.0 out of 5 stars See all reviews (2 customer reviews)
• Date first available at Amazon.com: November 2, 2006

Product Description

Product Description
Easily set your digital camera's white balance using the ExpoDisc Digital White Balance Filter. It's convenient, fast and easy to use. Made out of metal the ring easily snaps into and out of your lens' filter threads.

Customer Reviews

Most Helpful Customer Reviews

12 of 14 people found the following review helpful:

5.0 out of 5 stars The answer to your white balance issues, January 30, 2007

By	Aaron Lee "calmik" (Idaho falls) - See all my reviews (REAL NAME)

This product works amazing. Currently in my photo class we are going over white balance and we did some testing. we shot a gray card (has black, 18% gray, and white) and set that as our custom white balance and it worked good. We then shot just the 18% gray. We then used the expodisc and the results were almost night and day. The white balance was perfect. the whole class was amazed. the ease of this product can not be surpassed, your shots will come out noticeably different. I would whole heartedly recommend this product to anyone who is shooting digital.

2 of 9 people found the following review helpful:

3.0 out of 5 stars ExpoDisc test result, November 20, 2007

By	User "User" (Salinas, CA USA) - See all my reviews

I purchased ExpoDisc 72mm. Here is test result, using Photoshop:

SETUP: Took a gray frame under incident light source per ExpoDisc instruction, using camera Canon EOS 40D, 28-135mm lens.

IMPORT to Canon software "Digital Photo Professional" FOR WHITE BALANCE: Use this gray frame to do white balance itself. A result of a final Gray Frame.

IMPORT this final gray frame to Photoshop FOR MEASUREMENT: Using Photoshop Color Sampler Tool.
Result finding in 256 color scale (0 - 255):

Green & Blue = Mostly about equal.
Red = Always about 10 (in 256) value higher than the other two.
Example:
Green = 112
Blue = 114
Red = 124

I repeated this type of test several more times, result are still much off from scientific theory or way out of range (10 in a range of 256 or 4% error from neutral).
Supposely: Red = Green = Blue to call Neutral.

So this ExpoDisc is for convienent only. OK for none important picture. Way too high price for a non-precision piece.