Topics

I shoot time lapses of stormy weather.  Conditions can go from sunny skies to very dark in very short order.  Currently, I manually adjust my shutter speeds by 1/3rd stop increments in order to compensate for the changing light, then I fix the bumps in post using Lightroom and LRTimelapse.  I shoot at the shortest write times possible (2 seconds) and I will on occasion run into a collision state as my exposure time gets longer.  So, i'm wondering if it would be possible to configure the  intervalometer to work based on this formula:

Shutter speed (variable) + Write time (fixed)  =  Interval

An intervalometer that worked on this dynamic formula would be a huge asset to me and would make Holy Grail photography a breeze if a person is willing to do the manual ramp necessary.

I'm willing to fairly compensate anyone willing to make this happen, there are NO products on the market at this time that can do this and I think it would be very popular.

Jimbr549

Quick question: 

Would it be possible to program intervals with half second times?  1.5", 2.5", etc.  I have a need for this if it's possible to do.

Thanks in advance!

I did my first bulb ramping test with the new features of 2.3 last evening.  Canon 60D, fw 1.1.1, MF Nikon 28mm f/2, interval of 10 secs.

Settings were:

Auto ExpoRamp: Sunset
MAX Rampspeed: 0.001 EV/shot

Started off with a ND filter witch I removed at :13, you can see the color shift.  I had to toss 3 images, but ML recovered very well.

Here is the video:

Here is a cropped video of the sky:

Lastly, here is the log file:

http://ftp.jimbaileyphoto.com/filechute/BRAMP04.zip


Still quite a bit of flicker, something strange happens at image 4628.  The exposure gets longer/shorter/longer. etc.  That should not happen with sunset setting, correct?

I made some mistakes here:  removed the ND filter much to soon, causing the camera to use fast shutter speeds, resulting in flicker.  Not sure if I set ML up to fail as I don't fully understand the MAX Ramp speed setting, and I'm not sure if I used the correct percentile for metering.  Looking at the log file, I think I used 67th...?

I intend to try again this evening, weather permitting.  Any tips appreciated, any questions gladly answered.

JB