Unusual f/1.25 refractor

[skysurfer]

What about this Canon lens ?

http://www.the-digital-picture.com/R...ns-Review.aspx

70mm aperture f/1.2.
And excellent image quality, do it does exist, but costs a mere A$3000.

Pop an EP adapter in it with a Nagler or Ethos hand grenade (another A$1000) and you get stunning views without nooticable coma.

I once put an Ethos 13mm in a Canon 200 f/2.8L (15x) and got a whopping 6 degree FOV sharp to the edges. I pointed it a Crux and saw the whole cross in the field !
So short f/values do not always mean a horrible coma.

[Stefan Buda]

Nagler type eyepieces work well at fast f ratios because they are in fact combinations of Barlow plus eyepiece, but f/1.2 is a totally different ballpark to f/2.8.
Coma is not a typical eyepiece aberration, astigmatism is.

[The Mekon (John Briggs)]

The owner at least seems to be getting more realistic on a price.
Was $2500 on IIS two years ago.
Now $750 on ebay...... but sorry, I still have no desire to own or use a scope like this.