If you're talking about your Camera, then no it's not normal.
You can open the Camera & go to it's Settings & Reset it's Settings.
You can also go to Settings > Apps > Camera & Scroll down to it's Storage & Clear BOTH Cache & Data for the Camera > Reboot & see if the issue is resolved.
He's talking about the camera, unless you can take pictures with the gallery.
"photo application when you open it? It takes me like 3 to 4 seconds before it opens and 2 to 3 seconds before I take pictures"