Hier noch ein erhellender Text auf Singastro.org:
ariefm71 - Wed Dec 06, 2006 7:21 pm
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TMB doesn't figure or polish the lens (unlike Roland Christen), he only design it and sell the design to either APM or William Optics. APM then send the design to LZOS for fabrication, I don't know who fabricate the TMB lenses for WO, though.
So, yes, the WO TMB-designed lens ARE TMB lenses. There is only ONE lens that TMB said he didn't design it, but WO said (with some email exchanges posted on a chinese website to prove) it was indeed designed by TMB, that ONE lens is the new 132mm f/7 lens.
Here's a complete lenses that TMB designed:
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/1163855/
Due to some conflicts with WO and APM regarding some payment or whatever (btw, TMB never received any payment from APM, the "payment" is in the form of complete telescopes that APM built), TMB decided to work with Astronomics to release his own "signature" series APO with lenses that TMB himself send to the same company that make Takahashi lenses. You can go to CN behind the scenes articles to read more.
Now, I think Liuming was referring to the TMB triplets that LZOS made (which actually can be had from outside APM, but that is a secret I can not tell here). But, for me, for visual use, a doublet is still better than a triplet.
We're still waiting a comparo between three 5" TMB scopes, the 130mm f/7 signature series, WO 132mm f/7 (WO dropped the reference to TMB on this lens), and the APM 130mm f/6 triplet. We should know which factory makes the BEST TMB lens: Russians, Chinese, or Japanese in a few weeks time.
Arief
Gruss: b.fankhauser