APOD: Star Trails and Tajinastes (2010 Jun 18)

[Chris Peterson]

but i guess TC-80N3 would not work with 500D without modification. TC-80N3 is not mentioned among accessories for 500D in Canon's website; besides TC-80N3 uses "N3 Connector" whiles 500D takes "E3 Connector" (2.5-mm phone plug).
how can i make an adapter to connect N3 to E3 Connector? do you think it'll be ok if i just connect Tip, Ring & Sleeve of E3 to Expose, Common & Focus pins of N3?

I use the TC-80N3 with a 350D, which also has a 2.5mm connector. Both connectors use the same three signals. There are descriptions on the Internet for performing various mods. You can either cut the connector off and replace it with the phone plug, or use some wire to make pins for the existing connector, and hook those up to the phone connector (which is what I did).

[geckzilla]

are there specific cameras that can be programmed like this? for example is it possible to take these shots with "Canon 500D" in the programmed way? because 40D's cable release is different from 500D's. there are two models for Canon 500D (RS-60E3 & RC-1/RC-5) which i doubt calling them smart --they can just trigger the shutter and lock it!

I use the Canon TC-80N3 smart cable release. It works with all Canon DSLRs, but you need to make a little connector adapter to use it with the older models. I think it works without modification with both the 500D and the 40D.

If you have a Rebel XT like I do, this is the best I could find... afaik there is no adapter available. Just FYI: http://www.unmaintained.com/forums/thread/63.aspx

[moonstruck]

Wow, thanks guys. That's a lot of information for just one day on the forum. Does every single star that we see have a name or number somewhere?

[Case]

Does every single star that we see have a name or number somewhere?

Many efforts have been made to catalogue the brighter stars. http://en.wikipedia.org/wiki/Star_catalogue
One of the biggest whole sky catalogues (USNO-B1.0) contains about a billion objects, mostly stars (but a few distant galaxies crept in).

[Chris Peterson]

If you have a Rebel XT like I do, this is the best I could find... afaik there is no adapter available. Just FYI: http://www.unmaintained.com/forums/thread/63.aspx

Right, Canon doesn't make an adapter. But the mod is trivial- didn't take me five minutes.

[Amir]

Thanks Chris and Geckzilla.