Hello!
I’ve tried a few times now to capture an all-night time-lapse using my fisheye lens (via the sequencer), taking a shot every 15 seconds. I’m using auto-exposure for this.
Generally, it works quite well; however, I’ve noticed that the exposure time never seems to exceed 5 seconds, even though the profile file specifies 15 seconds.
My goal is to capture the Milky Way, but that’s likely to be difficult with exposure times of only 5 seconds. It would also be ideal if the exposure time could be reduced—for instance, when the moon rises.
Regards,
StarFlea
Auto Exposure > 5 sec?
Forum rules
If you have a problem or question, please check the FAQ to see if it already has an answer : https://www.sharpcap.co.uk/sharpcap-faqs
If you have a problem or question, please check the FAQ to see if it already has an answer : https://www.sharpcap.co.uk/sharpcap-faqs
Auto Exposure > 5 sec?
- Attachments
-
- FishEye Video 15s 500 (veLOX_C) (G3M178C).ini
- (2.06 KiB) Downloaded 2 times
-
admin
- Site Admin
- Posts: 17384
- Joined: Sat Feb 11, 2017 3:52 pm
- Location: Vale of the White Horse, UK
- Contact:
Re: Auto Exposure > 5 sec?
Hi,
that's a ToupTek camera you're using there right? On that make of cameras (including all the derived brands with the exception of Altair) the autoexposure only runs up to 5s - it's a limitation of the camera SDK. The API to set the maximum autoexposure value will fail on those cameras if I try to use a value longer than 5s. Altair being the exception has a maximum of 60s - this seems to be for historical reasons.
Unfortunately there isn't really much I can do about this - the SDK imposes a hard limit and SharpCap doesn't do its own autoexposure except in limited circumstances (and what it does isn't suitable for this sort of use case)
sorry about that,
Robin
that's a ToupTek camera you're using there right? On that make of cameras (including all the derived brands with the exception of Altair) the autoexposure only runs up to 5s - it's a limitation of the camera SDK. The API to set the maximum autoexposure value will fail on those cameras if I try to use a value longer than 5s. Altair being the exception has a maximum of 60s - this seems to be for historical reasons.
Unfortunately there isn't really much I can do about this - the SDK imposes a hard limit and SharpCap doesn't do its own autoexposure except in limited circumstances (and what it does isn't suitable for this sort of use case)
sorry about that,
Robin