Box and Circle

Posts: 1
Joined: Sat Oct 27, 2012 4:17 pm

Box and Circle

Post by malcolm » Sat Oct 27, 2012 4:27 pm

I see that you can split the box and circle using two fingers to spread them apart.
Having done this, what is the purpose of this feature?
I presume you are able to control these 2 items, but how and to what end?
Is there a way to freeze focus?
If you do not want the same exposure values throughout the timelapse, can you let the camera on your Iphone set the exposure automatically?
Have you ever begun a timelapse in darkness, and let it run through sunrise into daytime?
If so what settings did you use for the exposures?
Don't worry, I am comfortable with all the settings in classic mode.
Final question, is it possible to drag the shutter to get some motion blur?

thanks, great app!


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Posts: 605
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Re: Box and Circle

Post by xyster » Sun Nov 04, 2012 12:01 am

The 'box' reticle controls the focus point and focus lock. The 'circle' reticle controls the exposure point and exposure lock.
Dragging the reticles around sets the respective points of interest. For example, the camera will focus where the focus reticle is positioned.
Tapping once on either reticle will toggle a lock (assuming the camera supports locking the settings!). To freeze focus, you would tap the focus (box) reticle. A little lock icon will appear on the reticle to show the setting is locked. Tap again to unlock.
When the exposure (circle) reticle is not locked, exposure will be set automatically for the duration of the session.

You can start a timelapse in darkness and let it run all day, when exposure is not locked, it will adjust accordingly. However, keep in mind that depending on the exact device, the end result may show considerable flicker as the iPhone's exposure is not entirely consistent - this can be solved with post editing on a PC with video post editing programs.

The iPhone does not provide access to low level camera settings such as actual exposure settings or shutter speeds. TimeLapse can approximate long exposure in Express mode. The exposure setting simulates a long exposure time by taking multiple shots and combining them. It is a simulation so it doesn't really capture more light but it can do a decent job at reproducing motion blur. See this video for an example: viewtopic.php?f=18&t=372#p730