Toby Posted February 12, 2020 Share Posted February 12, 2020 Shot at F/10 using a minolta 100mm macro ISO 640 @ 1.3" on sony a7iii Link to comment
Stefano Posted February 12, 2020 Share Posted February 12, 2020 Chlorophyll is probably the responsible for the red glow. It fluoresces deep red. Link to comment
Toby Posted February 12, 2020 Author Share Posted February 12, 2020 Chlorophyll is probably the responsible for the red glow. It fluoresces deep red. I agree that it could be chlorophyll, though it definitely seemed brighter than other chlorophyll containing plant parts like leaves. When I was doing this test I bought a bunch of fruit and the kiwi was by far the brightest. Link to comment
nfoto Posted February 12, 2020 Share Posted February 12, 2020 Lots of stuff other than chlorophyll can appear with a red fluorescence. Try eggs -- no chlorophyll there ... Link to comment
Toby Posted February 12, 2020 Author Share Posted February 12, 2020 Lots of stuff other than chlorophyll can appear with a red fluorescence. Try eggs -- no chlorophyll there ... That would make more sense, since it seems strange that there would be significant photosynthetic ability on the inside of a fruit. Link to comment
Stefano Posted February 12, 2020 Share Posted February 12, 2020 Lots of stuff other than chlorophyll can appear with a red fluorescence. Try eggs -- no chlorophyll there ...Yes, eggs are very cool under UV. I tried it once. The chemical that does this is protoporphyrin IX (I did a quick research). Why a precursor oh haemoglobin should be found inside a kiwi? Also, the green color of this fruit suggests me of chlorophyll, even if it doesn't make a lot of sense. Chlorophyll is present also in unusual parts of a plant, even though green fruits are not very common. Link to comment
nfoto Posted February 12, 2020 Share Posted February 12, 2020 Eggs were just an example that sprung to mind.... Link to comment
Stefano Posted February 12, 2020 Share Posted February 12, 2020 Eggs were just an example that sprung to mind....Yes, of course you didn't mean that it was the same compound found in eggs. I may have given this idea with my answer. Link to comment
Guest Posted February 13, 2020 Share Posted February 13, 2020 Excellent detail Toby. And a belated welcome to the boards here, btw. I also shot a kiwi fruit some time ago ["]https://www.ultravio...post__p__14370] - I'm happy to see our results are quite similar (this at least helps me to feel confident that I've done something right! Link to comment
dabateman Posted February 13, 2020 Share Posted February 13, 2020 Great kiwi image.The kiwi berries are similar. I shot some but never posted.Similarly never posted that English cucumber seem to so far be one of the brightest vegetables. Link to comment
Guest Posted February 13, 2020 Share Posted February 13, 2020 @dabateman: You should definitely post your English cuke pics! I shot a regular (?) cucumber a while ago [link] - I'd like to see how the English variety compares... Link to comment
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