Basically I am not very fond of tripods. On rare occasions you need one and still you have to carry them around all the time. Another reason for not liking them is the lack of flexibility in positioning the camera (for example, horizontal or vertical, or the position I want to take). So, I never take a tripod with me.
Coming back from Xi’an in China I noticed that in the hall of the Terracotta Army quite a few pictures had an ISO value of 6400 or close to it. And that the Shutter Speed I choose was not fast enough to compensate for the zoom of the lens to avoid shaken pictures. For that reason, a couple of pictures were rightfully not accepted by Dreamstime. When you blow up the picture (100%) you can see the errors.
Let us have a closer look at the contradicting circumstances and requirements in the hall of the Terracotta Army:
- In the hall there is not enough light, maybe this has something to do with the preservation of the terracotta sculptures.
- I wanted a large DoF (Depth of Field) to have several ranks of soldiers in focus.
- The sculptures are a bit away from where I could stand, so to get enough detail I had to zoom in. Otherwise I would get only overview pictures with no detail.
If there is not enough light, there are four options: use a flash, slower Shutter Speed, wider Aperture, or increase the ISO. Remember, the last three determine the Photographic Triangle. See my post on this to understand the relationship between them: if you change one it at least affects one of the others to get a correct exposure.
Let us have a look at these four options:
- Use a flash This was no serious option because the sculptures were a bit too far away to evenly light the two or three ranks of soldiers I wanted to capture. And maybe I was not even allowed to flash.
- Slower Shutter Speed Because of the low light conditions, the Shutter Speed was already pretty low, even further lowering would produce shaken pictures. Furthermore, there is this rule that if you zoom to for example 200mm, the Shutter Speed should be no higher than 1/200th of a second.
- Wider Aperture Because I wanted several ranks of the soldiers in focus this was no option.
- Increase ISO Given the above three, ISO was already in the 5000+ range. Going beyond 6400 (the limit of my Nikon D800) produces only darker pictures with a high noise ratio.
To handle this conflicting situation, I took a slightly slower Shutter Speed. As to be expected, this resulted in slightly shaken pictures. As long as the pictures are small, like in this post, you can hardly see it. However, to sell the picture commercially, the picture has to be perfect, even at 100%.
So, what is the solution? Use a tripod. Because the sculptures don’t move using a slower Shutter Speed is no problem. You can take an arbitray long exposure time to get the right DoF and, at the same time, a low ISO to avoid noise.
So, I have learnt my lessons. Next time I take a small tripod (Traveller Mini Pro) that can be attached to the outside of my photography backpack (Lowepro Transit Backpack 350 AW).