DGK Color ToolsDGK Color Tools 8x10 18% Gray Card for Film and Digital Camera

works well for what is needed

Accurate gray, FLAT FINISH so no glossy reflections to cause inaccuracies. Within 1/10 f-stop of the high-priced card, as measured with 6 different hand-held meters, digital and analog. Incredible bargain, almost a disposable price. I have several and have cut some into 4 pieces to put in different kits.

Not bad for the price, but you get what you paid for. It is a kind of hard paper and was bent when delivered. I love the 8 X 10" format for big lenses, but only if you do not have to transport it. That being said you could cut the exact pocket dimension you want and at the end there would not be any problem anymore. Make a hole in it and put a ribbon so you can attach it at your wrist in case of. That being said go and buy ALSO a plasticized one in case it would rain.

I can’t believe how grey it is! It’s almost like a really light black

Having ZERO experience in photography outside of clicking away on an iphone or GoPro; being assigned to photograph a large selection of oil paintings that require (near) perfect color accuracy seemed daunting. Using the DGK and following my camera's manual, I can't stress enough the change in my shots! Setting White Balance, determining exposure, and dust mapping my camera's sensor (all tasks I hadn't even heard of a week ago) using the DGK is ULTRA easy and produces AMAZING results. I'm now firing away at this project with NO post-processing for the images' color to look just like the actual painting! The card itself (it actually comes with 2) will not take much abuse so i advise keeping it in the bag it comes in until ready to use and promptly put away after use.

When I fill the frame of my FX3 with the card and adjust exposure to read zero exposure compensation, my light meter reads exactly the same f/stop, shutter speed, and ISO exposure value.

Shipped quickly, but the item description should be more clear that this is a paper card, not a plastic one like what my photographer friend and I thought I was ordering. She let me use hers (by the same manufacturer) during a product photography tutorial and I was in love with the results. Imagine my surprise when mine came in and it was a flimsy paper one vs. the sturdy plastic version she and I used. I would have appreciated something other than "not water resistant" to denote that it was made of paper.

Nice size calibration/background gray card.