there's a review of the sigmonster at Luminous-Landscapes. It may not be the 1200 of the canon, but I am sure it's big enough to shoot down a plane or two 
You can read the review here![]()
I wonder if anyone would ask, while someone is using it. If one can see the moon with that thing 
p.s If this review makes you buy one don't hold me responsiblefor any problems it may cause.




