It's beautiful. Time-lapse photography shows how cactus blooms.

I know how to shoot. Put the cactus in an indoor room. The light outside is completely blocked, so artificial light must be used. Then light it up like a portrait until it is suitable, and then turn on the video recorder for continuous recording. The camera card should have enough capacity, use the speaker stand and take a picture at last.

Of course, you can also use a camera. A tripod must be used, and the capacity of the card should be large. You should also have a cable release that supports delay. If not, please connect the camera to the computer. Usually used USB and EOS series, others have not been tested. Then set the automatic shooting time on the computer. The minimum interval of EOS series software is once every 5 seconds, and 5D, 6d, 7d and 700d are all the same software. With the special cable releaser, you can set 1 sec. Canon cameras also need an AC power supply, 70 yuan each, which is sold on a treasure. Match a large-capacity card, then set the number of cards, just operate it, calculate the time, and then set the timing or change the card.

Simply calculate the capacity: 32G card, file size 5M, you can shoot 6400 cards, and it takes 35 hours to shoot a card in 20 seconds. 17 hours. Leave it alone.

DV is recommended, but it cannot be made into 4K video. If you want to shoot a 4K video, use a camera. However, useless pictures should be filtered out later. Probably a lot.

The BBC filmed the flowering process for a few seconds for two years. Wish you success!