Long exposure time is sometimes good but ...
 

For your information.

I found the possibility to use rather long exposure time (longer time than the time for one frame) useful in low light situations to get enough DOF for static objects.

However, if you zoom, you may get a rough zoom experience.

For instance, you are shooting 25F at an exposure time of 1/6 sec.

Then I believe you will get 3 still photos (shot at 1/6) then a closer zoomed photo. Then another 3 new still photos and then a closer zoomed photo and so on.

The zoom will look rather rough.

I guess this could be fixed like this:

1. Zoom four times slower than what you like to see.
2. Cut away the "still photos" from the zoom sequence and just keep the zooming photos in post. Fixed! Now you have a blurred zoom.