The price changes according to different materials, different specs of products, as well as different quantity.
For exact price of the products that you need, please contact with our sales, you can send your specs or drawings,
we will quote you the most competitive price as well as the good quality.

Achromatic lenses are so important for its Centre error. 
The following table is a simple reference about our process level. 

Dimension	Cemented lens qty	Centre error	Cemented lens qty	Centre error
5mm~20mm	2pcs	<1arcmin	3pcs	<1arcmin
25mm~55mm	2pcs	<1arcmin	3pcs	<2arcmin
75mm~120mm	2pcs	<2arcmin	3pcs	<2arcmin