I am looking for simple alternatives to hemispheric photography for comparing light environments in secondary forests. I have seen some papers that use red:far red light ratios as a relative metric for light penetrance, and also have run across some basic hand-held field sensors that take red:far red readings and seem not too over the top in terms of pricing.
Does anyone have experience using these sorts of field sensors for red: far red (e.g. Field Scout)? Are they reasonably effective and accurate? I have relatively little background with this kind of work or instrumentation, so any comments from those who have experience would be welcome. Thanks, Diane
