View Single Post
  #348  
Old 03-07-2019, 12:07 PM
sopticals's Avatar
sopticals (Stephen)
Registered User

sopticals is offline
 
Join Date: Jun 2010
Location: Oamaru, New Zealand.
Posts: 206
Progress on second 33" mirror.

Just finished a 12 1/2" f4.14 mirror (well ready for final star testing). The second of my 33"ers, this one a f3.95 is going through corrective figuring to
correct a "rolled edge" defect. Did manage to get the inside 30" to an acceptable level of performance, but need to do better.All my work is done by hand, no machinery of any kind, (except did do the edge bevel with a belt sander).
Attached Thumbnails
Click for full-size image (IMG_4921.jpg)
80.5 KB31 views

Last edited by sopticals; 03-07-2019 at 05:29 PM.
Reply With Quote