The advantage of fluorite glass over the ED glass used in less expensive apochromats is primarily its high transmission, which ensures a significantly brighter image. Anyone who has ever looked through a genuine fluorite apochromat will never forget the crystal-clear, white image.
While glass and ED glass (fluoride) still produce minimal stray light, no stray light can be detected with a fluorite element. This can be demonstrated most impressively with a green laser. The high-energy green beam is clearly visible as a beam when passing through all glass substrates – only when passing through fluorite does the laser beam remain invisible.
The triplet objective is oil-filled and fully encapsulated for the fastest thermal adjustment and to prevent haze and reflections.
Oil-sealing is the best method for mounting astronomical triplet lenses – and for reliable long-term protection of the sensitive CaF2 crystal. It is extremely complex and requires extensive knowledge of materials. This is why this sealing method is only offered by small manufacturers with extensive optical experience and their own production facilities.
It not only matters which telescope you buy but also where you buy it. Our additional services:
- We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
- We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
