Time-lapse device for NEX 5

Started May 15, 2011 | Discussions thread
macsoft3
Regular MemberPosts: 151
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Re: Astrus = Super set of Tempus
In reply to tsk1979, Dec 5, 2012

Hello tsk,

The 2 remotes have different functions.
with TEMPUS, you set TIME BETWEEN PHOTOS on the remote, and it will make your camera take a picture from TIME to TIME. Better suited for time-lapse photography.
With ASTRUS  you don't control time between photos, you first set your camera to BULB mode, and with ASTRUS you control EXPOSURE TIME. So you can get photos with 30 min exposure for example. most camera only allow 30 seconds. with this remote you get as far as 30 minutes. It also has a repeat function, so it will take an photo with the amount of exposure time you choose, and it will repeat the order again and again until you turn it off.
ASTRUS is better suited for ASTROPHOTOGRAPHY where long exposures are need. You can take pictures of the night sky with star-trails.
The best way to explain it is with an example:
When you use TEMPUS, and  you set it for 10 seconds  interval between photos, for example, it will:
- Send IR signal to camera
- wait 10 seconds before repetition
- Send IR signal to camera
- wait 10 seconds before repetition
- Send IR signal to camera
- wait 10 seconds before repetition
- Send IR signal to camera
....
If your camera is in normal remote mode, it will take a picture every 10 seconds.
When you use ASTRUS, and  you set it for a 2 minute exposure time, for example (your camera set in BULB mode), it will:
- Send IR signal to camera to open shutter
- wait 2 minutes
- Send IR signal to camera to close shutter
- wait 3 seconds before repetition
- Send IR signal to camera to open shutter
- wait 2 minutes
- Send IR signal to camera to close shutter
- wait 3 seconds before repetition
- Send IR signal to camera to open shutter
- wait 2 minutes
- Send IR signal to camera to close shutter
- wait 3 seconds before repetition
....
ASTRUS gets you  2 minute exposure photos, with a 3 second interval between closing and opening the shutter for the next photo.

If as you try to use ASTRUS NOT in bulb mode to try to do time-lapse, you won't get constant intervals between photos. because astrus has to trigger 2 times: to open shutter and to close shutter. So, if you set it to 10 sec interval and don't use bulb mode, what you'll get is:

- takes photo

- waits 10 sec

- take photo

- waits 3 sec

- take photo

- waits 10 sec

... and so on.

Hope this could help!

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