Is there a increasing light filter?

[RTX 3070 I7 11800h]

Hi, I was using a 55-250mm efs 4/5.6 and I was shooting at a stadium at night. I couldnt get the desired image without increasing iso to 8000 and the aperture was locked at 5.6 80% of the time and the shutter was 400 of a second. I tried cutting down the iso to 4000, and I put the shutter to 200 of a second. I found motion blur in some of the images and it still wasn't the desired sharpness. Obviously they were good enough but the photos I saw of other people doing the same thing at the same stadium with the same lens and their settings was 1/320 of a second iso 1000 5.6. And I was wandering if there was a filter that made more light hit the censor. 

 

Thanks,

[Eigenvektor]

Not much of a photographer, but I'd assume a filter can only ever remove, never add. To get more light, you'd need a bigger lens or some light source. Are you sure the images in question were not "enhanced" digitally afterwards?

[RTX 3070 I7 11800h]

1 minute ago, Eigenvektor said:

Not much of a photographer, but I'd assume a filter can only ever remove, never add. To get more light, you'd need a bigger lens or some light source. Are you sure the images in question were not "enhanced" digitally afterwards?

It was my friend. He was next to me and we have the same kits almost and he showed me the photo as soon as he took the photo

[For Science!]

There are things called speedboosters, but it doesn't seem to match up with your description.

 

Probably just down to better technique (i.e. how stable you can hold the camera)

[Eigenvektor]

1 hour ago, For Science! said:

There are things called speedboosters, but it doesn't seem to match up with your description.

Quick research says this is basically a bigger lens (so that more light can reach your sensor)

 

You use a camera with a small sensor, a "speedbooster" to focus the light and act as an adapter for a bigger lens: https://www.dpreview.com/articles/2667195592/first-impressions-metabones-speed-booster

[GDRRiley]

you just need a faster lens with better optics. a F5.6 doesn't say how much light gets in thats why T stops are used in cinema. F stop is the math equation of how much could come through. T stop is how much actually light gets through 
you can't use a speed booster here between EF-S to EF-S (S35/ APS-C) sensor