When shooting SLR at night or indoors, you don't want to adjust the shutter too slowly, but also ensure that the low beam is sufficient and how to adjust the parameters such as aperture.

Aperture priority mode should be adopted, as long as the depth of field allows, the larger the aperture, the better.

Simply improving ISO will greatly increase the noise of photos.

The correct way is: when shooting, save it in RAW format instead of JPG format; Adjust the exposure compensation to -2EV or even -3EV before shooting, so that the shooting speed will increase by two or three steps under the same aperture (for example, your normal speed is 1/30s, and if you adjust the exposure compensation to -3EV, the exposure speed will increase to 1/250s. The photos taken here are almost all black on the SLR LCD screen. Leave it alone because of the underexposure.

In the post-processing, special software (such as Nikon's special software NX and Pentax Photo Lab) is used to improve the exposure compensation of RAW photos by 3EV. The exposure of the photo is the same as the correct exposure, but the shutter speed is increased by 3 levels. And the photo quality has not decreased.

This is the method adopted by professional photographers. Of course, the premise is that you have to master this knowledge.

In the past film era, the so-called 3-point photography and 7-point darkroom were actually the same as digital SLR. It's just that the darkroom of digital SLR is the post-processing of software. A considerable number of photographers don't understand the post-processing of the software. Actually, they can only be called photography, not photography.

One more thing, about the flash. Everyone has noticed that when performing on the stage, you often see a flash in the audience. In fact, most of them are amateurs, because the working distance of the flash is only 3~ 10 meter. If you use the flash at a distance of 20 meters, 30 meters or even 100 meters or 200 meters, isn't it a joke and doesn't work?