The shots go from noon until 2:20pm and then restart at 3:40 and run until 4:30. With this lens there are no auto capabilities, so I would have had to adjust the ISO, aperture, and/or shutter speed with every shot to maintain balanced lighting. As it was I changed the shutter speed once in the first period of time, from 1/250 sec to 1/180 at around 0:42 seconds, but it’s barely noticeable, especially as the shift to the later time also has slightly, but noticeably different angle. Those shots, from about 0:48 forward, are in fading light and thus had the shutter speed opened to 1/45 second. I thought about increasing the shutter length (or, rather, decreasing the shutter speed) and/or increasing the ISO, etc. But the clouds rolling in didn’t look too interesting and the temperature was dropping quickly (I was shooting out of a wide-open window in my bedroom), so I figured I would save the longer time lapse for another day.