dabateman Posted December 10, 2019 Share Posted December 10, 2019 I found this to be an interesting series, which seems to be the reverse of what I typically see. It seems the petals get darker into higher UV (closer to 390nm) and lighter in deeper UV (Closer to UVC). Visible reference image of the Sunflower: All the below monochrome images are captured off the back of the KSS Imager with quartz 60mm lens, using a stock GM5 camera with Olympus 30mm f3.5 Macro lens. UVC image of sunflower using single 250nm UVC light with just 253.7bp25 filter: All the following images were captured using 2 ExoTerra UVB 26W bulbs. Since the Monochrome imager down converts the high UV energy to green light, it doesn't seem to pass 600nm+ light. So I don't need to use an IR blocker filter with my filters that leak IR. 303bp10 with 2mm U340 filter (seems to be the best to reduce the off axis dichroism): 313bp25 filter (clear slide filter inserted): 335bp10 filter (clear slide filter inserted): 370bp15 filer (clear slide filter inserted): 390bp25 filter (clear slide filter inserted): 405bp10 filter (clear slide filter inserted): Link to comment
Andy Perrin Posted December 11, 2019 Share Posted December 11, 2019 Another very interesting series, especially since this is one of our benchmark flowers. I would also like to see a dandelion when they return. Link to comment
dabateman Posted December 11, 2019 Author Share Posted December 11, 2019 For fun here are some color mixed shots after alignment. B for Blue, G for Green and R for Red channel B253 G370 R390: B253 G303 R370: R253 G370 B390: B303 G370 R390: B303 G335 R405: Link to comment
Guest Posted December 12, 2019 Share Posted December 12, 2019 I like your "B303 G370 R390" mix - it plays up the contrasts in the subject without having to 'turn up' the contrast. Link to comment
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