GBTimelapse: AutoRamp Easy Expert Method
A sunset time-lapse using AutoRamp and only one neutral density filter
GBTimelapse: AutoRamp Expert Method
A sunset using AutoRamp with three neutral density filters.
Using a Canon 5D Mk II with 16-35mm lens, the timelapse begins at f2.8, 0.5” bulb and ISO 100. Three ND8 filters were stacked on the lens reducing the exposure by 9 f-stops to allow the 0.5” bulb exposure at such a wide aperture. As the scene darkened, AutoRamp gradually increased the bulb exposure time. Whenever the bulb time increased to 10 seconds, I carefully removed one of the ND filters and AutoRamp adjusted the exposure time accordingly. After all three filters were removed, AutoRamp incrementally increased the ISO by one f-stop whenever the bulb exposure time increased to 20 seconds. Once the ISO reached 1600, AutoRamp continued to increase the bulb time to a maximum value of 24 seconds. There was virtually no flicker in the sequence – achieving the timelapse “Holy Grail” of a sunset with no flicker!
GBTimelapse: AutoRamp Advanced Method
A sunset using AutoRamp without any neutral density filters.
Using a Canon T2i with 10-22mm lens, the timelapse begins at f22, 1/15” ISO 100. As the scene darkened, AutoRamp gradually decreased Tv and then switched to bulb mode at 0.7 seconds. From then on it incrementally decreased the Av by 1/3 stop whenever the bulb exposure time increased to 16 seconds. Once the Av reached its minimum value of f3.5, AutoRamp incrementally increased the ISO by one f-stop whenever the bulb exposure time increased to 16 seconds. Once the ISO reached 1600, AutoRamp continued to increase the bulb time to a maximum value of 30 seconds. There was flicker in the original images due to Tv stepping when not in bulb mode. The flicker was removed using GBDeflicker.
GBTimelapse: Using the AutoRamp Plan
How to setup AutoRamp using the AutoRamp plan to help plan how your camera settings will change over the course of your time-lapse
GBTimelapse: AutoRamp Using Lens f-stop Calibration
Demonstrates how GBTimelapse AutoRamp features uses a lens f-stop calibration table to eliminate reciprocity errors.
GBTimelapse: AutoRamp Why Is f-stop Calibration Needed?
A short demonstration showing that lens f-numbers are not accurate enough to prevent reciprocity errors. This shows the need for lens calibration.