[Satchmo]

Zane wrote : "Thanks for pointing me to that , some good information on just how good fast scopes can be."

Zane- I didn't get the same impression in the sense that the instruments weren't pushed anywhere near the useful upper limit of 25 X per inch ( and I consider a 1mm pupil the ideal for bench star testing as it is enough to reveal the true diffraction structure of the Airy Disc to the eye) .

I didn't see anything in the review that pointed to any rigorous practical test of optical excellence- just two large scopes being used at relatively lower power large exit pupils in comparison to each other : the 17mm eyepiece listed as the highest power used giving 5.3mm pupil or 4.7X per inch on the F2.75 - these are RFT `light bucket' type magnifications.. So from my perspective - wanting to know whether these particular examples of newer scopes on the market can equal the established general quality in the US market of their longer focal ration cousins, the report fell short.

I look forward to seeing some more rigorous reviews perhaps against a longer focus reference standard- and I say that coming from the perspective of having the opportunity of bench star testing two large fast ( F3.6 ) mirrors from USA in the last year.