Filter for star light & videocam
Posted 22 January 2013 - 11:18 AM
Posted 22 January 2013 - 12:14 PM
Posted 23 January 2013 - 11:48 AM
Posted 23 January 2013 - 12:14 PM
All UHC filters are not exactly the same. For visual use there's not too much of difference but when imaging the sensors in the cameras have a wider range of sensitivity and then some of the differences in the filters start to become apparent.
For video viewing the Astronomik UHC filter is very popular because it also passes quite a bit of IR light, and this helps when viewing galaxies (which often have a significant IR signature). Most other UHC filters don't pass as much IR and when compared to the Astronomik filter the galaxies don't show up quite as well.
On objects other than galaxies there's not much of a difference between UHC filters. If you don't have an Astronomik model I wouldn't worry. I'd go ahead and get used to using whatever UHC filter you have (which will with longer exposures open up a lot more potential viewing under skies with lots of light pollution). If you then find that your spending a lot of time viewing galaxies then perhaps the additional investment would make sense.
Posted 26 January 2013 - 01:51 PM
Posted 26 January 2013 - 02:12 PM
Posted 26 January 2013 - 04:05 PM
Posted 26 January 2013 - 04:31 PM