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I was in Yosemite from July 19 to July 23. The flow over Vernal and Nevada falls was still large. The other falls were beginning to dry up. I did carry the 4x5 a total of about 24 miles during the...

Thanks for mentioning the Lumileds. I had forgotten about them. I got 10 of them (3 red, 3 orange, 3 590 nm amber and 1 white) since Future electronics has a handling fee for orders under $25. They...

I a planning on constructing a LED safelight for my darkroom. I want to use Lamina Light Engines LEDs. These are a ceramic substrate with many LED dice attatched. There is a red (618 nm) and an amber...