What is the best lens, aperture and focal length for product photography?

Of course it is a constant aperture fixed focal length head.

It is recommended to use a 50mm f1.4 lens.

There are three types of positional light needed for indoor posing: primary light, secondary light, and silhouette light.

If you don't have a light fixture, use a flash one, be careful not to hit the light too hard, that is, the first level of projection is not too dark.

Sensitivity recommendations, between 200 ----400 and then high noise is deadly, depending on the camera and lens quality.

Exposure mode is recommended to M-speed manual, the parameters must be adjusted in the field.

To pay attention to the use of fixed-focus bokeh function, with a good very nice.

Be sure to use a tripod, stable is a good guarantee of commodity photos.

Aperture (Aperture), is used to control the amount of light through the lens into the light-sensitive surface of the body, the size of the aperture determines the amount of light through the lens into the light-sensitive element, usually F value to express the size of the aperture.

The complete range of aperture values is as follows: f1.0, f1.4, f2.0, f2.8, f4.0, f5.6, f8.0, f11, f16, f22, f32, f44, and f64.