View Single Post
  #4  
Old 05-10-2024, 09:29 AM
Peter Ward's Avatar
Peter Ward
Galaxy hitchhiking guide

Peter Ward is offline
 
Join Date: Dec 2007
Location: The Shire
Posts: 8,475
While the concept of an array of fast lenses (aka Dragonfly telescope) has broken new ground i.e.
"...... the equivalent of a 1.0 m diameter refractor with a focal ratio of f 0.4, the largest and by far the most sensitive lens telescope in existence" this newly advertised array of 4x 80mm telescopes (F7.0 ???) is sadly not a dragonfly equivalent.

You end up with about 0.02 sq m of optics at about F7.0 (or whatever...but it certainly will not be F0.4).

A F4.0 10 inch newtonian with spiffy carbon tube can be had for $9k or so and give you 0.05 sq m of optics.

Sure, it won't look like a AA missile array (probably handy if you live in Beirut ) but will collect photons far more quickly for less $.

BTW, P.T.Barnum is credited with saying "there's a sucker born every minute".
Reply With Quote