How to Position a Part in the center of the screen?

You can write your topic however you want, but you need to answer these questions:

  1. What do you want to achieve? Keep it simple and clear!
    As particles dont render in viewport frame, So im trying to position a part in the center of the screen with a particle emitter.

  2. What is the issue? Include screenshots / videos if possible!
    I dont know how can i get the position that is in the center of the screen a little far from the camera.

  3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
    i tried setting camera.position but not working.