So we simply believe you that they are individually tested ?
What is your MINIMUM standard? What's the min. RMS surface wavelength I mean?

If the 111 is TMB designed, what is the difference then between the SS series and AT series? I did not find any info on the 111 on the website, and on Astronomics website (interesting it should be there but not on AT website!) there is no mention of TMB...

My specific concern is this:

-The TMB 92mm (triplet FPL-53 AND TMB design) costs $2000

-The AT 111mm (triplet, FPL-51 and TMB design + interferometrically tested) costs $ 1800

Comparing to other similar products on the market (SV,WO, Russian TMB) either, the 92mm costs TOO much, or the AT is a real bargain... or both!