Quote:
Originally Posted by snas
But I still wonder why we don't use more binocular eyepieces in astronomy.
|
Well, it's because it is expensive (two eyepieces instead of one), bulky, light path is significantly longer (creating focussing and vignetting issues) and it reduces the amount of light for each eye (by splitting available quantity of light in two), effectively making the objects to appear 50% dimmer.
And we are in constant struggle to collect as much light as possible...