Would like to share my 8" F6.95 or say close to F7 cave mirror that I got in a recent purchased dobsonian telescope. It was obviously been used in the EQ platform before, because I also got a lot of machined aluminum block to form a EQ bracket. It appears to me the previous owner/owners treasure the optical performance of this mirror as I can see a lot of effort was made to built the custom titanium wrapped OTA tube and dobsonian mount. All the allumnum part for the EQ tube holder are custom designed and CNC cut.
The mirror give very good performance at 180x magnification when looking at the moon, Its performance is also very impressive when looking at Jupiter at 180x I can discern a lot surface features. It can not go much higher magnification than that as the view degrade quickly which higher magnification.
On the telescope tube I got its tube has a sticker says "2.15 wavelength/div" ( I am not entirely sure what this mean?) and "F6.95"
Please see the following picture for the itching text on the edge of the mirror.
Cave optical co. (block font)
M# E.Q. 298215 - RF
and another inscription "M# E. Q. "
Looked up the registry did not find many near this serial # range. Love to hear from anyone who know more about the history, quality, or date of this mirror. Its back has no inscriptions. It was told that has been recoated once. the coating is very good to me.
Edited by lh881026, Yesterday, 09:59 PM.