« on: June 28, 2013, 09:54:55 PM »
Technology moves on - with todays design systems there's a careful balance of optical design and coatings
formulation, computer controlled lens grinding takes the craftsmanship out of the glassworks into the NC programming lab and the secret to a quality lens is still the assembly process and the fine tuning of the unit as a whole. That's why people pay an extreme premium for Leica lenses and why neither Sigma, Tamron, and even Canon nor Nikon can build a high quality CHEAP lens. Robots can do a lot, but not the fine adjustments necessary to consistently produce high quality optics. Look at the Canon 70/75-300 in its many current models to instantly
see the difference. Even the Canon 50mm - you want good at $100, better at $400 or best at $1200 - take your
choice - and if you want a slightly different look, try a zeiss at $800.