镜头背后：马蹄莲的春天

来源: 乐乐妈于 2014-06-05 15:06:57 [档案] [博客] [旧帖] [给我悄悄话] 本文已被阅读：次 (4515 bytes)

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应朋友们的要求，决定写一个《镜头背后》系列。作为一个全职工作的孩子妈外加风光摄影的爱好，没有多少自由的时间，只能是有时间就写发，请谅解。如果大家有特别的问题想我写的，可以给我Email： lelema66@yahoo.com。我不是常来wxc，有可能悄悄话不会及时回复。

这篇的英文是现成的，发布在《Outdoor Photographer: Behind the Shot》上的。

With all the warm weather we had this winter, not having much needed rain, I noticed Calla Lily at Big Sur blooming earlier in March 2013. After I had seen a few pictures, I knew I had to pay a visit ASAP, the flowers were probably past prime time. The day was the only day I could get out of work earlier, but the weather was not cooperating… No clouds could be spotted from the coast. I debated a few minutes, decided to give it a shot. Well, sometimes we need to trust our own intuition. It turned out it was some of the best light I had ever seen in the Big Sur area.

I arrived around 4 in the afternoon, there was nobody around, the flowers were just passing their prime, so it was not so bad. The flowers were beautiful but surrounded with poison oak. To find a good spot to set up a tripod was a challenge. I would have liked a close-up calla lily as foreground, but also wanted to photograph masses that could make a bank of flowers look as if they go on forever. As a consequence, I needed to pay a lot of attention to every detail I saw in the viewfinder because it would have a huge impact on the overall look. I took some time to look around and went to the flowers that attracted me most and placed my tripod carefully away from the poison oak.

I began to try different compositions and picked the one I liked most, then manually I focused the lens on the flowers first. It was a windy day. To shoot the flowers in focus was not an easy job.

The sky is as important as the flower, it definitely enhanced the whole image. After I got a sharp foreground picture, I used two different exposures to shoot the mountain and sky, no filter used. This image was made from three exposures that have been blended together via Photoshop CS6.

Equipment and Setting: Nikon D800E, Nikkor AF-S NIKKOR 14-24mm f/2.8G ED zoom lens. Gitzo GT2541 Mountaineer 6x carbon fiber tripod, Really Right Stuff BH-55 ballhead – Three exposures at 1/8th, 1/20th, and 1/80th shutter speeds, f/8.0, ISO 50

最近我去了趟Oregon也是拍野花，和上面的马蹄莲同样的用了景深合成 (focus stacking)的方法。

景深就是画面清楚的范围。这几张的前面的花离人很近，景深会很浅。即使是用小光圈也不太可能把前景的花和后面的山都拍得很清楚。一般拍野花的地方风都很大，花左右摇曳非常美，但要把花拍清楚就是挑战了。再说用小光圈拍前面的花意味着高ISO，这也是我们需要避免的。

用“景深合成”的方法就可以做到全景深都清晰无比。这个方法主要是改变对焦距离多拍几张，然后后期合成最后就会得到一张全景深的照片。后期我是用photoshop合成但细节不行，最后还是要自己一点一点用蒙版把虚的部分插掉。云师推荐了Helicon 据说非常好用，但我自己没有用过。如果拍微距的话，用Helicon合成会非常省事。

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