Admin
Admin
Αριθμός μηνυμάτων : 8056
Registration date : 10/07/2008
 |  Θέμα: Milky way scientists 28.03.13 15:47 | |
| | |
|
Admin
Admin
Αριθμός μηνυμάτων : 8056
Registration date : 10/07/2008
| | Θέμα: Απ: Milky way scientists 28.03.13 15:50 | |
| | |
|
Admin
Admin
Αριθμός μηνυμάτων : 8056
Registration date : 10/07/2008
| | Θέμα: Απ: Milky way scientists 02.05.13 12:30 | |
| Elements Imaging - Photography by Troy Casswell The Star Trails Panorama - Questions Answered! My star trail panoramas here have attracted a lot of questions. I shot three 360 star trail panorama shots in 2011, my last one being featured on Milky Way Scientists Facebook page. This is something I am very proud of. Anyway, here’s a basic rundown how these are achieved. First of all, I have captured all the photons with my camera and strive to maintain their integrity through to the final image. Noise reduction is always kept to a minimum. Also, being a panorama photographer, I use a home built panorama head for my tripod that suits my needs. After dreaming about doing this months prior, a I finally figured out how to do it. I wanted to be the first to ever pull this off. However, others had achieved it using a circular fisheye lens pointed straight up, although I do feel that too much resolution is lost using a circular fisheye.. So not sure if I can claim being the first, but pretty sure I was the first to capture it in high resolution. I can be proven wrong though! The star trails were shot using a series of 5min exposures at f4.0 and ISO100 with a Canon 17mm TS-E lens on a 5DmkII. My lens and camera settings will be different in future. About 12 shots were used, and then stitched together for the final 360 degree panorama. Because it is next to impossible to capture the fast changing light conditions during the dawn/dusk glow using this lens (about 18x3 images required), I switched to a Samyang 8mm fisheye (get 9000x4500 pixel res panos out of this lens). The entire 360x180 sphere can be captured in 6-7 shots with +/- 2ev exposure bracketing to capture the extreme dynamic range of the scene. There is a lot of work stitching, etc. I hope this answers a few questions. Anyway, here’s the first one I ever did in “little planet” projection.  | |
|
