"Hi Jeff/ Vega,  thank you for your explanation. Jeff, another question, have you worked with some yellow filter in converted Canon S110 so that could filter bellow 460-470 nm and be able to allow red and infrared waves to make ndvi graphics?. Thank…"

"Hi Jeff, I write you from Argentina and I`m discovering in this moment this blog very interesting. I’ve read it, and I have a question to you about this that I can’t understand. In order to reach the NDVI index, don’t we need a transmitance…"