11 replies to this topic

[Stefano]

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 goggles
IR: 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.

[colinbm]

Hey these are fantastic Stefano.
Do you have to get on top of the wall to photograph the flowers ?

[Stefano]

Yes, I have. A very uncomfortable position, very tiring. Or on top of a small ladder.

[Stefano]

Anyway, thank you.

[colinbm]

Stefano, If you want to cut the UV for your VIS shots, Rosco R3114, cuts close to 400nm.

[Stefano]

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.

[colinbm]

Stefano, the GG420 will fluoresce under UV light :-(

[Stefano]

Rosco doesn't? Even my R72 fluoresces in IR and deep red with strong UV.

[colinbm]

The R3114 doesn't fluoresce.
Thanks for the tip on R72, I didn't know.

[Cadmium]

Stefano, I like that last IR shot a lot!

[Stefano]

Thank you!

[Andrea B.]

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.