Stefano Posted August 21, 2020 Share Posted August 21, 2020 Here are some images, taken recently and less recently of my sunflowers. Filters:UV: ZWB2 (2 mm) + chinese BG39 (2 mm)VIS: chinese BG39 (2 mm) + polycarbonate gogglesIR: Hoya R72 UV. F-stop: f/2.8, ISO 1600, 1/8 s exposure. UV. F-stop: f/2.8, ISO 1600, 1/8 s exposure. UV. F-stop: f/2.8, ISO 1600, 1/8 s exposure. VIS. F-stop: f/7.1, ISO 200, 1/640 s exposure. IR. F-stop: f/7.1, ISO 200, 1/800 s exposure. IR. F-stop: f/7.1, ISO 400, 1/640 s exposure. The above is just a quick shot to give an idea on how tall this things are. I measured the tallest one some days ago, and it was 3.19 m (about 10 ft 5 in) tall. I still have a little leak in the UV images. Yesterday my camera lens got stuck because glue from the filters I attach entered inside (I never put tape on the lens directly). I managed to fix it, but I slightly damaged the lens. The last photo was taken after this, so the camera still works. I will need an upgrade in the future, maybe years from now, but this camera will not live forever. Link to comment
colinbm Posted August 21, 2020 Share Posted August 21, 2020 Hey these are fantastic Stefano.Do you have to get on top of the wall to photograph the flowers ? Link to comment
Stefano Posted August 21, 2020 Author Share Posted August 21, 2020 Yes, I have. A very uncomfortable position, very tiring. Or on top of a small ladder. Link to comment
Stefano Posted August 21, 2020 Author Share Posted August 21, 2020 Anyway, thank you. Link to comment
colinbm Posted August 21, 2020 Share Posted August 21, 2020 Stefano, If you want to cut the UV for your VIS shots, Rosco R3114, cuts close to 400nm. Link to comment
Stefano Posted August 21, 2020 Author Share Posted August 21, 2020 I may consider it in the future. The ultimate 400 nm cut filter I would get one day (who knows when) would be 2 mm thick GG420. It doesn't make sense to buy it now for my camera, to attach it with black tape on a cardboard ring coming from toilet paper (these are my filters). Rosco R3114 would be more than enough. Link to comment
colinbm Posted August 21, 2020 Share Posted August 21, 2020 Stefano, the GG420 will fluoresce under UV light :-( Link to comment
Stefano Posted August 21, 2020 Author Share Posted August 21, 2020 Rosco doesn't? Even my R72 fluoresces in IR and deep red with strong UV. Link to comment
colinbm Posted August 21, 2020 Share Posted August 21, 2020 The R3114 doesn't fluoresce.Thanks for the tip on R72, I didn't know. Link to comment
Cadmium Posted August 23, 2020 Share Posted August 23, 2020 Stefano, I like that last IR shot a lot! Link to comment
Andrea B. Posted September 3, 2020 Share Posted September 3, 2020 I've certainly seen tall cultivated sunflowers, but did not know that they could reach 10'. Wow! The IR sunflower is cool. The IR-absorbing, dark seeds provide an interesting contrast. Link to comment
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