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Bird
Carpal Tunnel
Reged: 08/07/03
Posts: 2621
Loc: Canberra, Australia
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Re: Firewire DFK 21AF04.AS vs. Lumenera Skynex 2-0
09/09/07 08:41 PM
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It really comes down to a choice between USB and Firewire, you'll find similar features on cameras with either interface. ie the Dragonfly Express (firewire) is very similar in features and sensitivity to the Skynyx (usb2). I've compared notes with Damian on our cameras, and after compensating for mirror size and exposure there's very little difference between them.
For my money the firewire bus is a much better choice than USB for video, simply because there's a published and well supported firewire video standard, whereas there's no similar standard for USB video.
This means:
- All firewire cameras speak the same protocol, so you have a wider choice of
applications to use, but all usb video cameras are different and have different features.
- The firewire video spec means that you can program the camera directly if you're that way inclined. Very few (if any) usb cameras let you talk directly to the camera. This means that more 3rd party software will be written for firewire cameras.
- The cpu usage is lower when transferring firewire data because the firewire controllers understand video. This means you can get more performance out of firewire cameras.
- Firewire is cross platform, so you can use the same camera on Linux, Mac, Windows etc. I'm using firewire cameras under Linux with very good free software called coriander.
Just my $0.02
cheers, Bird
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Deep Sky Optics 13.1" f/5.5 newtonian,
PGR Dragonfly Express, PGR Dragonfly 2
RedHat Linux + Coriander
http://www.acquerra.com.au/astro/
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