Using a blue filter on a digital camera

Hi. First post.

I’m an all analog guy except for needing digital for work so I’m pretty ignorant. When I put a blue filter on my lens to correct for the light of high pressure sodium lamps my camera automatically changes the image back to the orange glow. I’m using a Canon T3i. I’m sure this is an insanely stupid question but google has failed me. What can I do to keep what I see through the viewfinder?

Thanks

Welcome aboard @Plastic!
This is likely a white balance issue. Set the camera's white balance manually, e.g. to Daylight.