Is f/4 to 5.6 a big problem on a canon L lens?

Hi, I just want to buy the canon 70-300L, but people said that the aperture f/4-5.6 is a big problem. So what do you think? I have a canon t6s

"people" must explain why the smaller aperture is a "big" problem.

Since All 70-300 mm lenses ($650) only come in one aperture flavor, f/4-f/5.6 or f/4.5-f/5.6, there's really no alternative except to buy a 70-200 mm f/2.8 ($1,350) and a 300 mm f/2.8 lens ($6,100) for fast lenses that cover those focal lengths, but my guess since you have an entry level Canon digital SLR, those are far outside your budget.

The 70-300 mm lens is perfect for shooting action, sports or air shows in full sun. The problem with lenses with smaller apertures when wide open is that they can't be used to shoot sports indoors or under the lights.

I shoot a lot of high school football and the lighting on the fields can be rather poor, so I use a Nikkor AF-S 200 mm f/2 lens stopped down to f/2.8 for a sliver of depth of field. NCAA football fields usually have better lighting so I can use a Nikkor AF-S 300 mm f/2.8 stopped down to f/4. In all those cases I'm shooting at ISO 6400 and a shutter speed of 1/640th second. Generally for zoom lenses and telephotos, the fastest is f/2.8. If you know how to use lenses properly, f/4 should be okay. It's only a problem if you are trying to stop action in low light especially if you are zoomed out, when your max aperture would only be f5.6.

Then you might find that an f2.8 lens is better - you'll have 2 stops more to play with.

Other than that though it'll be fine. IF it's the big problem, Canon will not throw million$ to produce it for sale. And no one will not buy it and produce great pictures, million, from it.

It is big problem for pixel peeper and technical perfect photographer.

Generally for zoom lenses and telephotos, the fastest is f/2.8. If you know how to use lenses properly, f/4 should be okay.

It's only a problem if you are trying to stop action in low light especially if you are zoomed out, when your max aperture would only be f5.6.

Then you might find that an f2.8 lens is better - you'll have 2 stops more to play with.

Other than that though it'll be fine.

IF it's the big problem, Canon will not throw million$ to produce it for sale. And no one will not buy it and produce great pictures, million, from it.

It is big problem for pixel peeper and technical perfect photographer.