« on: November 19, 2014, 01:01:17 AM »
I upgraded to 10.10.1 once it got out. I would have wanted to do so later but its the only way I could get the 7D Mark II Camera RAW update for iPhoto & Aperture.
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Maybe so...I would love to own one as well. Less than 2kg 500mm would be awesome walk around lens & be more useful to me than any 400mm f/5.6 lens.
Whatever the reason, it is a lens I would like to own and stop me dreaming about 300 f2.8 /400 f4 with convertors and the /500 f4.
Incidently, i had the 100-400 but swapped it out for the non IS 400 f5.6 due to better IQ. Maybe the mk2 100-400 with 1.4x will be a sharp combination!
You beat me to the above calcs.More like economics of scale. Any sort of manufacturing with such a high quality control targets have a very high fixed cost.
As a user of astronomical refractors, the objective diameter usually determines the weight and volume.
However I'm not sure it's due to lack of demand but more a case of why sell one when you can sell two!!