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White balance lens cap

January 10th, 2009 · 3 Comments

I had this idea about two days ago — make a lens cap out of the same material used for an ExpoDisc and you can leave it on all the time.

Turns out it has already been done.  [via dps]

Rather begs a DIY version though doesn’t it?  I have a cheap 3rd party extra lens cap (bought at great expense in Venice just down from the Rialto when I thought I’d lost my original Nikon cap), which I could merge with a Pringles can lid with or without a coffee filter.

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3 responses so far ↓

  • 1 xmnr0x23 // Jan 10, 2009 at 9:32 pm

    I prefer this approach:

    Get a sheet of acrylic diffuser material, and you could slide it in the Cokin Filter System. I’ve only tried to hold a sheet in front of the lens, and used it to measure WB on my old D70. Worked fine!

  • 2 raymond // Jan 13, 2009 at 3:10 am

    Sounds like another good idea! Thanks for sharing.

  • 3 redstep73 // Aug 7, 2012 at 3:21 pm

    I used a 1.5 inch hole saw to cut out the center of a lens cap and glued a cut out from a heavy duty styrafoam plate on the outside. On a densitomiter it read perfectly neutral. Tested this out worked perfectly, ended up making about one hundred of them for the company I work for, hard use in the field no issues so far, tested better than some of the ones we purchased.

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