lens design and manufacture article
here is an iteresting thread on lens manufacture and design.
it starts off on zeiss lenses,but progresses to discuss apochromatic design etc and includes contributions from optical engineers- it should be of general interest to all
comparing the construction and design of my Takumars was pleasing as they have cemented elements which are very rare these days due to the manufacturing costs.
i read somewhere else that a Pentax engineer claims that these days to make a lens to the same standard as the 50/1.4 SMC Takumar would require a sale price of US$1500.enough crowing about my takumars-here is the link
http://medfmt.8k.com/mf/elements.html
it starts off on zeiss lenses,but progresses to discuss apochromatic design etc and includes contributions from optical engineers- it should be of general interest to all
comparing the construction and design of my Takumars was pleasing as they have cemented elements which are very rare these days due to the manufacturing costs.
i read somewhere else that a Pentax engineer claims that these days to make a lens to the same standard as the 50/1.4 SMC Takumar would require a sale price of US$1500.enough crowing about my takumars-here is the link
http://medfmt.8k.com/mf/elements.html
Latitude: 37° 52'South
Longitude: 145° 08'East
Canon 20d,EFS-60mm Macro,Canon 85mm/1.8. Pentax Spotmatic SP,Pentax Super Takumars 50/1.4 &135/3.5,Pentax Super-Multi-Coated Takumars 200/4 ,300/4,400/5.6,Sigma 600/8.
Longitude: 145° 08'East
Canon 20d,EFS-60mm Macro,Canon 85mm/1.8. Pentax Spotmatic SP,Pentax Super Takumars 50/1.4 &135/3.5,Pentax Super-Multi-Coated Takumars 200/4 ,300/4,400/5.6,Sigma 600/8.
0