With OK they are not weighing luggages during boarding , however they do at checkin , same as all airlines

If you camera is heavy but not huge , you can put it in a normal backpack , checkonline and go straight to security/immmigration , and no one will notice

If you use the dedicated bag , ask nicely at checkin to give you a tag ''approved cabin'' cause you want to keep your camera with you for safety reasons

Last solution , as a DL silver you will have an extra luggage for free so you can check the camera also