http://www.hubble-optics.com/products.html


미국의 Hubble optics 라는 곳인데 값이 엄청 싸네요.
다른 업체의 절반 가격인데 과연 믿을 수 있을지...


OD              Thickness (mm)         Price (Plate Glass, F/5)
14.0"           ~49                                $1,100
16.0"           ~53                                $1,500
18.0"           ~53                                $1,900
20.0"           ~53                                $2,400
22.0"           ~57                                $3,000
23.0"           ~57                                $3,350
24.0"           ~79                                $3,750
28.0"           ~79                                $5,800
30.0"           ~79                                $7,250
32.0"           ~87                                $9,100
36.0"           ~87                                $14,000