Just to remind everyone that I have issued a health warning about my results, so they do need to be verified in the field really before you ought to totally trust them.some bloke wrote:This is incredibly in depth stuff - thanks Humpers.
The ahorton lens seems to have now switched from the best to the worst performer, I have never tried the kaidomain ones but it now looks like I should if I am reading your last results correctly? EDIT: Were I to feel I need more light which I don't right now but hey - guys like to play with torches lol..
I seem to have got something muddled because I think I read that thicker lenses are better than thinner ones. I'm slighly dyslexic and sometimes have trouble absorbing the written word when it's too long or deep so I've probably got that wong.
The ahorton, with a particularly short focal length, does capture more of the output of, for example, the Oslon Black than any other lens. This is why in V1 and V2 of my table it came top. But at that point I hadn't realised quite how important the "point source effect" was, i.e. the LED appearing small to the lens at it's focal length. V3 of the table takes this into account, which is why the other lenses with a longer focal length have overtaken it.
To be honest I don't think there will be much difference in the field between the ahorton and the Kaidomain lenses as there's only a relatively small difference between 10,000 odd and 14,000 odd on my table. From my experiments I think the ahorton is also optically a much better lens than the Kaidomain and Ant Supplies lenses, so will let through a greater proportion of the light that's hitting it than the latter, but this is only my opinion so don't take it as gospel.
Regarding your point about thicker lenses being better than thin ones, it depends how you define "better". I think they generally are of better quality optically as they are harder to make than thin ones so only the better manufacturers produce the thicker lenses, and they tend to take more care over the materials they use, etc. But because there are a number of factors involved in making a good LED + lens combination for our purposes, thickness only affects one of these factors (focal length) so it doesn't necessarily mean a thicker lens is better overall. Try asking your wife/girlfriend if thicker always means better!
If that still doesn't make sense then just ask.