Monday, February 06, 2012

GBTimelapse 3.2.35 - New features

There are a few new features in the latest GBTimelapse release. If you already own GBTimelapse, just download and install this new version. No upgrade is needed.

1) Added ISO calibration tables for the 5D Mk II and the 7D. This feature is enabled by a checkbox in Tools/Options. Using the ISO calibration table can improve AutoRamp reciprocity accuracy and minimize luminance shifts when changing ISO.

2) Added a default f-stop setting to the Camera/Profile. If you use the lens twist method to eliminate aperture flicker, be sure to set this value. It will be used if you didn't take a shot before doing the lens twist and GBTimelapse can't read the Av value from the camera.

3) The AutoRamp maximum ND filter value has been increased from 9.9 to 12.0 to allow the use of 10-stop filters.

4) The 1D Mk IV default camera settings were changed to allow bulb mode shooting.


Anonymous said...

Hi Mike,

To point 1: Where can I load the ISO calibration tables or will the table automatic be loaded if I check the box in the options menu? In the User's Guide you have written that only for the 7D this feature is enabled not for the 5Dmk2. What's right?


tlapse said...

They are automatically loaded if you check this option. Version 3.2.35 has tables for the 7D and the 5D Mk II.

Jesse said...

I noticed that when I have my 10 stop ND filter set up, it has to increase the iso to a painful 6400 even with a long exposure of the shutter. Then when I remove the filter, it moves back to a much quicker shutter and begins the process of stepping iso with the shutter. My question is, won't that make for a sudden change in the scene when the shutter is no longer being dragged as long and the clouds or water shows much less movement. Would you suggest this as being a better alternative to multiple NDs or am I going about this all the wrong way?

tlapse said...

Yes, there is a big change in Tv.

When I use a 10-stop I go to ISO 3200 and Tv=24 seconds. After removing the ND, it shifts to ISO 100 and Tv= 0.75 seconds.

When Tv=24, the image is softer than Tv=0.75 because of more movement.