TAKAHASHI FC-125 w/ red "F" stamped on lens cell or FS-128 either star tested
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WANTED: Takahashi FC-125 with stamped red "F" on lens cell or FS-128, has to have great optics
( in green light some were 1/5 wave pvt, some closer to 1/8 wave pvt), i know because i tested a few on my friend's Zygo interferometer years ago.
Diffraction pattern same in and out of focus? and have you tried with an artifical star?
Send pics! and all details!!!
Will buy only from seller in USA.
Thanks
ps if you go back to 2001-2015 you'll see I had over 100 ratings 5 STARS!!! Then I left the hobby for several years and did not renew my astromart acct. But AstroMart does not bring forward the ratings...why?
( in green light some were 1/5 wave pvt, some closer to 1/8 wave pvt), i know because i tested a few on my friend's Zygo interferometer years ago.
Diffraction pattern same in and out of focus? and have you tried with an artifical star?
Send pics! and all details!!!
Will buy only from seller in USA.
Thanks
ps if you go back to 2001-2015 you'll see I had over 100 ratings 5 STARS!!! Then I left the hobby for several years and did not renew my astromart acct. But AstroMart does not bring forward the ratings...why?
Funding Member
