"Create a realistic camera system that simulates real life perspective that can switch from first and third person views."

Creating a realistic camera system is a complex task and requires a deep understanding of Roblox camera mechanics and scripting. However, I can provide you with a simple script that allows you to switch between first and third person views. You can use this as a starting point and modify it according to your needs.

```lua
-- local script inside StarterPlayerScripts
local Players = game:GetService("Players")
local player = Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
local camera = workspace.CurrentCamera

local firstPerson = false

local function switchView()
    if firstPerson then
        firstPerson = false
        camera.CameraType = Enum.CameraType.Custom
        camera.CameraSubject = humanoid
        camera.FieldOfView = 70
        camera.CFrame = character.Head.CFrame * CFrame.new(0, 0, -10)
    else
        firstPerson = true
        camera.CameraType = Enum.CameraType.Custom
        camera.CameraSubject = humanoid
        camera.FieldOfView = 90
        camera.CFrame = character.Head.CFrame
    end
end

player:GetMouse().KeyDown:Connect(function(key)
    if key == "v" then
        switchView()
    end
end)
```

This script switches between first and third person views when the "V" key is pressed. You can modify the script to add more realism and customize the camera behavior as needed.