Tips & tricks
![blank](http://www.bloomingstars.com/wp-content/themes/kinatrix/images/blank-grid.png)
18 June 2007
Maximum Movie Length For Planetary Imaging
All wonderful hi-res planetary images currently taken by many amateur astronomers worldwide are all...
![blank](http://www.bloomingstars.com/wp-content/themes/kinatrix/images/blank-grid.png)
18 June 2007
Calculating the actual f/ ratio of a picture
Every telescope or telephoto lens has its “magic” f/number: that is, the ratio between...