Hi All, Regarding (unwanted) satellite tracks in astrophotographs, Tony wrote: > Astronomers using wide field telescopes ( like the UK schimdt at > Siding Spring mountain ) ,have been complaining for 20 years Tom. > There is a particularly bad example published many years ago in > Sky & Telescope that shows 5 trails on one plate. ... What's surprising is that more astrophotographers don't make use of computer programs have existed since the early 1990s (e.g. SkyMap) that completely eliminate the problem. In a matter of seconds, you can find every satellite that is going to intersect your camera's field of view during the exposure time and plan accordingly. Suppose you want to take a 1-hour exposure, and three objects will transit the FOV during that hour. If shifting the start time of the exposure is not an option, all you have to do is temporarily block your aperture during the few seconds that each satellite will pass through. Cheers, Rob ----------------------------------------------------------------- To unsubscribe from SeeSat-L, send a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@satobs.org List archived at http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Sat Feb 22 2003 - 18:52:49 EST