If you're getting incorrect FOV or there other issues with incorrect camera in Redshift please do 1 of the following:
[01] Bake camera's animation to keyframes:
Window > Timeline (fcurve)
Drag'N'Drop your camera object there if it's not present , keep it selected in the Timeline window.
Functions > Bake objects (All parameters, Bake Expressions, Clean Tracks, set desired range)
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Make sure all animated parameters of your camera were keyframed:
[02] export it to alembic with all parameters and use that. You can export the camera by right clicking on the camera object and choosing
"Bake as alembic" or go to
File > Export > Alembic (Cog Icon for settings). Please adjust the settings - adjust the scale if needed and make sure you have checked "Selection only", "Cameras", "Global Coordinates" and "XRef". If your camera is animated please also check the Animation section.
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Bring it back with Ctrl+Shift+O, check the settings as you merge it and hit OK. Make sure to switch the active camera to the newly imported alembic one.