I'm at beginning with Timelapse+, I'd like to try a timelapse with sunset to night / milky way target, but I need some advice or explanation before to do that and shooting a lot photos with wrong settings.
Ok, for example I will start the timelapse just before the sunset and my camera (5D mk2) settings for initial scene is f11, shutter speed 1/15, ISO 50.
If I set Timelapse+ in AUTO Bulb Ramp Mode with this parameters:
- Bramp Mode: Bulb, A, ISO
- Intrvl Mode Auto (Int Max 30 sec, Int Min 12)
- Aperture Max f2.8, Min f11,
- ISO max 1600
- Night Target: Milky Way-6
- Duration Time: 3 hours
Now, what I need to understand is: if I start to shooting now, the Timelapse+ start with f11, 1/15, 100 ISO and when reach the total night sky the Timelapse+ arrival to setting in automatic the f2.8 at 1600 ISO or probably is that it stop for example at f5.6, iso 400?
With parameters above mentioned, if in the scene at long distance there are some city lights or light pollution, is probably that light sensor in auto mode don't read the right light level and the Timelapse+ don't reach the 1600 ISO, f2.8 settings?
In this case if auto bulb ramp is not good setting for sunset to night milky way target, please can someone give me some instructions to setting correctly the Timelapse+?
Thank you very much
Sorry about the late response to your questions. I didn't notice this topic in the forum when it was posted.
I guess I don't understand how you got different results for "Bulb Min" when running Auto Configure for different aperture settings. The Auto Configure routine calculates the Bulb Min value based on the time it takes to actuate the shutter after the TL+ send a signal to open or close it. This calculation is independent of the aperture value, so Bulb Min should turn out to be the same no matter what the aperture is set at.
Here are my answers to your two questions:
Question 1: You don't have to run the "Auto Configuration" routine every time you turn on your TL+ or run every time you do a time-lapse. It should only be done one time for each camera. If you try using another camera, the "Auto Configuration" routine should be done again, but only once for that second camera. The TL+ stores all of the configuration parameters for each camera in a separate part of non-volatile memory, so when you turn the TL+ off, all parameters are still retained. The TL+ automatically knows which set of configuration parameters to use when a camera is connected by extracting certain information from the camera when initializing, including the serial number.
Question 2: I checked the values for "Settings
-> Time-lapse -> Bramp Tuning -> Integration", and I
found that the factory reset actually defaults to 5 minutes. Somehow,
this value isn't found when you scroll up and down the listed values
for "Integration", and the menu pointer ends up pointing at the
first value after the scan, which is 1 minute, because 5 minutes
couldn't be found. This is a bug in the program, which we will have to correct.
1 minute is considered to be too short of a time for most time-lapses, and 20 minutes is too long (I will change the documentation for this). A reasonable value is around 5 minutes, so you should manually set Integration to 4 or 6 minutes in the menu. The optimum time depends on your lighting conditions, and you might have to experiment with this to get better results.
thank you very much for your explanation, very helpful. I've 2 another questions...I didn't understand very well the first time camera settings in manual mode for to set aperture, iso and shutter speed for a good exposure scene, so I've run the first pc-sync calibration and after auto configuration (Run Autoconfig) for deflickering with a wrong aperture for the scene with result of over exposed or under exposed photos, so the T+ give me the first time a Bulb Min shutter speed of 1/20, second time 1/15 and now I've make a factory reset and I've repeat again the first calibrations with a correct aperture for the current scene (f7.1, 50 ISO, 1/20) and I got reading a Bulb Min of 1/30. At this time I took this reading "1/30" for good and definitive, so I've set T+ StartTv 1/30 (in Timelapse menu / Bulb-ramp) and also in settings menu /camera/Bulb Min.
This "auto configuration" (from T+ setting/camera/Run Autoconfig) and pc-sync auto calibration should be made only once or every time that I'll make a timelapse?
My second question is, from T+ "Settings -> Time-lapse -> Bramp Tuning-> Integration" after the factory reset I had a "1 minute" value, but reading on the T+ documentation on website I've change this parameter in 20 minutes. Is correct? have you to give me some better advice for this parameter?
At this time is all, thank you very much for help me and greetings from italy