Is it possible to have a affordable decent performing 500/5.6 IS?
Here is a thought experiment. A lens like the Tamron 150-600 exists. This lens sells at a profit in the US in the $1100 price range. At the long end it is i think around 580mm f/6.3.
Increase front group and iris size by 8%. Raises material costs by 20%.
Use higher quality "glass" in some of the optics. Raises material costs by 120%.
Replace mechanical zoom barrel with higher strength solid tube. Increases material cost by 10%
Replace zoom optics with simpler prime optics. Reduces material costs 30%
Use alternative focus group optics to accommodate the new front end optics. No change to overall costs
Use alternative IS group. No change to overall costs
Use alternative rear group to correct aberrations to target specification. No change to overall costs
($1100)x(1.2)x(2.2)x(1.1)x(0.7)x(1x1x1) = $2336
Maybe my guesswork is way out, but I think it's doable for under $3000
Here is a thought experiment. A lens like the Tamron 150-600 exists. This lens sells at a profit in the US in the $1100 price range. At the long end it is i think around 580mm f/6.3.
Increase front group and iris size by 8%. Raises material costs by 20%.
Use higher quality "glass" in some of the optics. Raises material costs by 120%.
Replace mechanical zoom barrel with higher strength solid tube. Increases material cost by 10%
Replace zoom optics with simpler prime optics. Reduces material costs 30%
Use alternative focus group optics to accommodate the new front end optics. No change to overall costs
Use alternative IS group. No change to overall costs
Use alternative rear group to correct aberrations to target specification. No change to overall costs
($1100)x(1.2)x(2.2)x(1.1)x(0.7)x(1x1x1) = $2336
Maybe my guesswork is way out, but I think it's doable for under $3000
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