SLR cameras are very picky. Can the expert give me some advice?

Nikon D90 has always been cost-effective, but its biggest weakness is that it is too old. The parameters of products produced in 2008 and three years ago can't keep up with the trend, so it is not recommended to buy them. Besides, it has been discontinued. The so-called electronic products, buy new ones instead of old ones, and the upgrading and parameter changes of electronic products are too fast.

D5 100 is also an entry level, which is much newer than D90, but it is biased towards Canon, so I won't introduce it.

550D is an upgraded version of 500D in that year, and it is also a recommended product for Canon. It has been selling well, with good comprehensive performance and complete parameter settings. If it's entry-level, this is not bad. If equipped with 18 55 lens, only 5000 is enough.

600D is an upgraded version of 550D, with more creative modes and inverted LCD screen, which is still a bit of a joke. Other parameters are basically the same as 550D.

60D belongs to the entry high-end, middle-end primary. Compared with the entry level, the parameters are improved a lot, including shoulder screen, Wuling mirror room imaging and five mirrors 500D 550D 600D imaging.

If you have enough money, it is recommended to choose 60D with 18- 135 lens. In fact, the telephoto end is enough, and you can also choose 18 200 lens, which is very expensive, and the pure lens should be at least 4000. That's enough for you to have both telephoto and wide angle.

Canon is still very popular. Nikon emphasizes cost performance. I also suggest choosing Canon. I also use canon.

Tripod, bag, SD card and other accessories, I suggest you buy them online, because online is still very cheap. These profits are great. If you buy it in a physical store, the merchant will give you black rice. You'd better check the price online.

Don't buy 8-speed, 8-category, high-definition continuous shooting and video for SD card. The reading and writing speed is enough. You can consider Toshiba white card. I'm using it, and it's cost-effective. You can buy another spare battery.

UV mirrors are also necessary.