 |
| Work-In-Progress mirrors and mirror blanks at the end of 2015. Upper row ,from left to right : *143 mm x 11mm thickness,not grinded *156mm x 14,7mm thkns,fine grinded up to #800 abrasive for F= 1240mm or F/7.9 *160mm x 16mm thkns ,fine grinded up to # 800 abrasive for F = 1200 mm or F /7.5 *317mm x 22 mm thkns ,fine grinded up to # 800 abrasive for F= 1360 mm or F/4.3 Middle row ,left to right : *91mm x 11 mm thkns ,fine grinded up to #800 abrasive for F = 810 mm or F/ 8.9 *72mm x 7mm thkns , fine grinded for F= 690mm or F/ 9.6 *76mm x 14mm thkns ,cast , not grinded Bottom row ,from left to right : * 150mm x 18mm thkns , cast , no tool blank *125mm x 15mm thkns ,fine grinded up to #800 abrasive for F= 1440 mm or F/11.5 * 182 mm x 18 mm thkns ,rough grinded for F = 1650mm or F/ 9.17 |
 |
| The 125mm cast blank and tool , fine grinded for a focus of 1440 mm or F / 11.5. |
 |
| The 150 mm x 18 mm blank. |
 |
| The pair of 143 mm x 11 mm blanks , untouched. |
 |
| The 180 mm x 18mm thkns blank , bought rough grinded for F= 1600 mm from Ioan Zaidel , a famous telescope maker of Romania befor and after World War II. |
 |
| The 317 mm x 22 mm mirror blank and tool , ready for polishing at F / 4.3. |
 |
| The coumpund thickness of of the 317 mm x 22 mm mirror blank and 15 mm thkns tool. |
 |
| Bird view of my biggest mirror blank. Not rated as big by today's standard but not small, tough ... |
 |
| The 160 mm blanks , the mirror blank is cast. |
 |
| The 156 mm blanks , cut from a big float glass chunk ,once part of the ''Ziridava'' show- window. |
