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Bulb Ramping with automatic ISO control

Total Solar Eclipse, Bulb Ramping + HDR Time Lapse by Alex Cherney.
Shot with the Promote Control.

Bulb ramping, or bramping, allows you to take a time-lapse of scenes with changing exposure levels and adjust for the light variation gradually to drastically reduce the flickering effect that would ruin an otherwise beautiful scene. The Promote Control works with your camera to ensure accuracy of up to 0.001 EV steps, making the light variation in a sunset, or elsewhere, seamless. Bulb ramping works by slowly adjusting the exposure value along a curve to make the adjustment smooth and unnoticed. If you know approximately when the light will change, like with a sunrise, you can tell your Promote when to start ramping. If the light changes come unexpectedly, you have the ability to make Live Modifications to ramp the exposure up or down across a number of exposures determined by you. This will allow you to make quick changes without disrupting your camera or setup.

Advanced Bulb Ramping mode allows you to program up to 2 Neutral Density (ND) filters and determine the range of ISO for automatic adjustment. As any good photographer knows, no single set of camera settings works for all situations. This is why the Promote Control is all about giving control to the photographer. The more possibilities you have, the more creative you can be.

Note: Bulb Assistant Kit and appropriate Shutter Cable are required for Bulb Ramping with Promote Control.

Heart of Vancity: Time Lapse with Bulb Ramping by Joel Schat Photography.
Shot with the Promote Control.

Promote Control - Bulb Ramping Tutorials

Basic Bulb Ramping

Advanced Bulb Ramping

A Bulb Ramping Tutorial from Joel Schat