How to take a photo?

A, equipment selection:

For a plane object like oil painting, it is very important to choose a lens. Macro lens is the best choice whether it is 135 camera or 120 camera, because the image field of macro lens is the flattest of all photographic lenses, which can ensure the balanced picture quality and small distortion, and is most suitable for shooting plane objects.

If you don't have a macro lens, you'd better choose a head display. Although its image field is not flat enough, its distortion and imaging quality are well controlled. However, when shooting with a pan/tilt, it is best to shoot a large oil painting, so that the focal length is farther and the depth of field can be increased. Then by narrowing the aperture, you can take a picture with clear center and edges.

For smaller oil paintings, it is difficult to take close shots with your head. Even if the aperture is reduced, the edge quality of the picture is difficult to guarantee. A medium telephoto fixed-focus lens is also acceptable, but the shooting site will be limited, and it is impossible to have a big oil painting without enough space.

Although many zoom lenses are equipped with macro function, they are not equivalent to real macro lenses. Uneven and distorted image field is inevitable, which is also the most fatal defect in shooting plane objects, so it is not suitable for remaking oil paintings.

The choice of camera mainly depends on the shooting purpose. If it is only used for taking pictures, the camera of 135 is enough, which is also conducive to reducing costs. If you publish an album, you'd better shoot it with a 6X7 or 6X4.5 120 camera to ensure the high quality of the pictures.

Second, choose a movie:

There is a great difference between oil painting and general scenery. The colors should not be exaggerated, and we should be faithful to the original work to the greatest extent. Therefore, it is the first choice to choose color reversal films with true color reproduction, such as Kodak EPP, Agfa RSX, Fuji 100F. Avoid using exaggerated films, such as Kodak 100VS and Fuji Virvia.

If you publish an album, reverse film is the best choice. If you are shooting proofs, you can also consider using color negatives. However, there are fewer color negatives on the market now. Personally, I think it is ideal to choose the negative film of Aikefa, and the color reproduction is more real and not exaggerated.

Third, the shooting points:

1, select light to avoid reflection:

The best light for shooting oil paintings under amateur conditions is bright scattered light, thin clouds cover the sun, and no obvious projected light can achieve the best effect. If there is no such weather, we have to choose to shoot in the shadow, which is quite limited.

Shooting oil paintings in this scattered light can show a good texture, and the reflection caused by uneven brushwork is just right. If the canvas is uneven and produces local reflection, you can adjust the direction.

2, how to put the oil painting:

The correct placement should be to lower the painting and tilt it upward at a certain angle, about 75 degrees from the ground. Raising the tripod and slightly tilting the camera can basically eliminate the problem of uneven light.

According to this principle, when shooting a vertical picture, it is best to put the oil painting horizontally, because the height of the tripod is limited, and the tripod cannot rise to the correct position after being placed vertically, so it is impossible to shoot.

3. How to measure light:

First of all, it should be emphasized that the metering of oil painting is different from that of general scenery. Oil painting is a plane object, so the light we want to measure is mainly the light perpendicular to the picture. Shiguang 308B exposure meter has a special accessory-plane light receiving window, which is specially used to measure the light ratio of plane objects and three-dimensional objects.

Some exposure meters do not have such accessories, but they can be retracted into the spherical light receiving window, such as Shiguang 508 exposure meter. In this form, its luminosity value is equivalent to the plane light receiving window; Photometric method adopts the method of measuring incident light, which can accurately measure the illumination brightness of the oil painting surface, and is not affected by the light and shade of the oil painting itself.