Why your 500mm lens cost so much...


diver-hloc

Moderator
Staff member
Apr 17, 2007
5,213
13
38
Somewhere North
#2
Never suspected that they treat the raw, unpolished glass like metal by a blacksmith... heating and molding the glass into shape by using a giant metal press.... :sweat:
 

area0404

New Member
Nov 10, 2011
95
0
0
#3
Just imagine how many fingers are cut to make a lens for you! XD
 

clov3r

New Member
Nov 10, 2009
234
0
0
Bukit Gombak
#5
They actually annealed the glass to remove the stresses, very interesting. I only know that they do that to metals.
 

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