Just curious as to how many of you have a light meter?
I'd like one but so far have not felt like spending the money for something that I can't change regardless of the reading.
I could to a degree I suppose and that's why I may get one at some point but since I don't have any real soldering skills I can't affect lux by changing the driver to one driven harder. I could experiment with varies aspherics and that's the only reason I would buy one.
If someone else experiments with asperics and has a light meter I'd like to hear from them as we may have similar lights and I could get some feedback from them since they would have measured their lights.
In any event I'm curious as to how many of you have one and how useful you have or have not found it to be.
Is there anyone who has a light meter that has measured the lux for an XR-E R2 me with a 28 mm aspheric? What did it measure and how hard was it driven?
I think I could roughly figure out my aspheric lights with that info.
I have one. Actually two: one from DX and one more expensive one in the lab.
Every flashlight I get or mod gets measured (ceiling bounce, spot intensity, as well as current, modes, diameter etc.; my integrating sphere is still not finished), some other things get calculated from that (e.g. NEMA-throw, throw/diameter etc.) and noted in a calc table. I'm a physicist, I like to measure things :) I used to publish the results on my web page, but my server is broken currently, I need to get and setup a new one.
The AEMC is supposed to have the best filtering of the economic lux meters and I use it for everything where I manually measure lux.
The HD450 has a stand alone logging function and is good for runtime measurements (But the logging has some problems).
The Tecpel is just a cheap meter, but has analog output, i.e. I can use it on my test bench for logging on a computer, together with a couple of computer connected DMMs. This gives this kind of graphs:
