diff --git a/nerfstudio/cameras/cameras.py b/nerfstudio/cameras/cameras.py
index 5644e2723..a84d39abf 100644
--- a/nerfstudio/cameras/cameras.py
+++ b/nerfstudio/cameras/cameras.py
@@ -677,7 +677,7 @@ class Cameras(TensorDataclass):
         pixel_area = (dx * dy)[..., None]  # ("num_rays":..., 1)
         assert pixel_area.shape == num_rays_shape + (1,)
 
-        times = self.times[camera_indices, None] if self.times is not None else None
+        times = self.times[camera_indices, 0] if self.times is not None else None
 
         return RayBundle(
             origins=origins,
diff --git a/nerfstudio/viewer/server/viewer_utils.py b/nerfstudio/viewer/server/viewer_utils.py
index 25a90579a..05be19ea0 100644
--- a/nerfstudio/viewer/server/viewer_utils.py
+++ b/nerfstudio/viewer/server/viewer_utils.py
@@ -757,7 +757,7 @@ class ViewerState:
         )
 
         times = self.vis["renderingState/render_time"].read()
-        if times:
+        if times is not None:
             times = torch.tensor([float(times)])
 
         camera = Cameras(