"We are now using the Sony a5100 for most projects (RGB and NDVI). It has a 24MP sensor with excellent dynamic range. It is also light weight and small enough for easy installation when used with the Sony 16mm or 20mm E-mount lenses."

"I've had several MaxMax-converted cameras. Never had a problem, so I'm surprised to hear about Michal's issue, but they are pricey.
Event38 has a filter that is not quite equivalent to the MaxMax filters, but still useful.
A potential new option,…"

"It is possible to use two cameras. We started with that method. However, it is a challenge to obtain precise synchronization between the cameras, it makes data processing more difficult, and it is not a complete solution in terms of band selectivity…"

"Benji,
You are seeing some of the complexities associated with using converted "NDVI" cameras. It does not make the data useless, but you have to take the limitations into consideration. One of the important factors to realize is that the data…"

"It was unclear from the way you asked the question whether or not you were aware that you need a visible AND a NIR band to calculate NDVI. Having both on one sensor makes image processing much easier. Be careful of "IR" conversions that only take…"

"The macros from MaxMax are scripts that plug into a free software called ImageJ. It is very limited, and takes a LOOOOOOOOOONG time to process images."

"Dave,
The CHDK firmware is free at: http://chdk.wikia.com/wiki/Downloads"

"Hey Christo, lekker om Afrikaans te sien!
Yeah, that is the way we use it. Agisoft for buiding the 3D model (Pix4D is another option), followed by an orthophoto with averaged reflectance values. Deriving a vegetation index and data sampling then…"

"There are going to be many answers to this question. I can only say what works for me after testing several options.
One of the classic, proven camera planes, with flying characteristics that keeps the camera pointing down even in gusty winds, and…"