Which camera lens should I use to take a picture of the concert?

pu1. 300mm or 100-400mm telephoto lens if you don't care about the price

2017-10-27

OK

pu2. If you're filming at a concert, you need to film it from the front so that you can recognize it
No matter how good the lens is, it's like that

2017-10-27

OK

pu3. It's hard to take a picture at a concert
I have to use a telescope and a tripod because it's night, but for that, the location must be really good

2017-10-27

OK