Many thanks for your responses. I suspected that the CR-39 description was inaccurate and one of their people has just confirmed that their 1.74 index lenses are indeed not made of CR-39, saying...
Type: Posts; User: arthur; Keyword(s):
Many thanks for your responses. I suspected that the CR-39 description was inaccurate and one of their people has just confirmed that their 1.74 index lenses are indeed not made of CR-39, saying...
I am getting some 3 year old lenses replaced and have the choice of paying in the region of $150 for CR-39 1.74 index lenses from selectspecs.com or around three times as much for my local optician...