Opening Of The Diaphragm
As we have already explained, the aperture of the diaphragm refers to how much the diaphragm is opened, a piece of the lens composed of several fins that open and close to let light pass. This is reflected on your camera’s screen as the F-number, an indicator that says F / XX. But beware, contrary to what intuition can tell you, the smaller the number, the higher the opening. That is, F / 1,2 is a huge opening, while F / 22 is a tiny one.
We must bear in mind that the opening not only affects the light that arrives at our photo but also at a depth of field, subject to which we dedicate a whole post. The higher the aperture, the less the depth of field will be (the space that will appear focused in the photograph). Thus, with an f / 2.8, you will have a thickness of just one meter; with an f / 22 you can reach up to 5 meters. It also affects the sharpness of the image. Each objective has a “sweetspot ” or sweet spot, where the image is sharper. Usually, this point is not in any of the openings ends but in one of the intermediate steps.
If the aperture refers to space we leave light to reach the objective; the firing rate obviously relates to time. The slower the shot, the lighter it will enter, but it can also be photos moved, and at a certain speed it is necessary to use a tripod. But beware; slow pace makes the images are blurry is not necessarily bad, as it can help us achieve some tremendously magical effects.
Light effect in motion. You can see the flash of light due to the cars in action. To achieve this effect, a slow tripping speed (prolonged exposure) and a tripod on a stable surface are necessary.
The importance of depth of field in product photography
We continue with the review we are giving to the product photography in these last entries. We have talked about many very different aspects, from the equipment we may need to lighting tricks, from photography with mobile phones to the different types of objectives we may need for product photography. But I had the feeling that I was leaving out something significant, and that’s what I want to talk about today: the depth of field in the product photography.
If you have ever seen one of those striking photos in which an object stands out against the background because it is out of focus and you have tried to imitate it, but you do not know how you need to learn more about the depth of field. The same thing happens to you if you want to photograph two objects that are at a certain distance from each other and you do not manage to get the two correctly focused.