GBTimelapse Using MX2 for Bulb Ramping
GBTimelapse (Version 3.7) can use the MX2 Dolly Engine from Dynamic Perception to control bulb exposure times. Because the MX2 runs in "real time" it has a much more accurate timer not limited by Microsoft Windows. This allow you to use much shorter bulb times and still avoid flicker.
GBTimelapse - How to setup a MX2 to control bulb shutter timing
GBTimelapse version 3.7 adds the ability to use a Dynamic Perception MX2 for bulb shutter control. This allows very short and accurate bulb durations and greatly expands the range of shutter times for daylight to night time-lapse. By using shorter durations you may not need to use a neutral density filter.
GBTimelapse: How To - Sunrise "Holy Grail" Using a 9-Stop ND Filter
Show you how to capture a “Holy Grail” sunrise time-lapse using GBTimelapse AutoRamp with a single 9-stop Neutral Density filter.
GBTimelapse: How To - Sunset "Holy Grail" Using a 9-Stop ND Filter
Show you how to capture a “Holy Grail” sunset time-lapse using GBTimelapse AutoRamp with a single 9-stop Neutral Density filter.
GBTimelapse 9-Stop Neutral Density Filter Calibration
When using GBTimelapse AutoRamp in bulb mode with neutral density filters, it's best to know the exact value of each filter. Even though a filter may be rated at 9 stops, it may not be exactly 9 stops.
I have found filters that are more than ten percent different from their rating.
To avoid a change in image brightness when adding or removing a filter, AutoRamp needs to know the exact number of stops of the filter.
There is an easy way to calibrate a filter using AutoRamp itself. This video shows you how.
GBTimelapse: AutoRamp Script Demo - Deutsch Version
Shows how to create and follow an AutoRamp script.