pierlux said:scyrene said:pierlux said:That's exactly what I'm wishing for in 2016: an inexpensive 600mm f/5.6 L IS prime, possibly costing 3000-3500 US$.neuroanatomist said:...The problem is people who wish for Canon to release an inexpensive 600mm f/5.6 lens, and are letting their wishes trump reality.
But as others have said elsewhere, the 300 2.8 has the same entrance pupil size as a 600 5.6. And that lens is just over $6000 at B&H Photo, despite being smaller than the wished-for lens.
On the other hand, comparing the old (for the sake of equality) 300mm f/2.8 to the 300mm f/4 (marketed in 1999 and 1997, respectively), their price in yen was 690,000 and 198,000, respectively, which is roughly a 3.5 fold difference in price for a 1-stop difference. So, I'm simply doing the same math in the case of the existing 600mm f/4 L IS II and an hypothetical 600mm f/5.6 L IS.
I suppose there's more than the dimension of the entrance pupil to establish the cost of a lens, it's more a matter of weight I suppose. The front element of a 600mm f/5.6, although probably being approximately similar in diameter to that of the 300mm f/2.8, would be much more flat and light and therefore easier and cheaper to manufacture. The same, possibly, for the remaining lens elements.
Many glass elements are handcrafted, especially those critical, unevenly curved aspherical ones. That's why a lens such as the 11-24 f/4 cocts so much. The less curvature is required, the less work is needed to achieve satisfying optical performance.
In addition, there's the old 400mm f/5.6... OK, it's old, and it has no IS, but its price is minimal and has a 77mm filter diameter, so again all the math based on the size of the front element goes.
I still stand by my assumption, that a 600mm f/5.6 prime could be priced probably north of 3000 US $, but not more than 3500 US $.
Well I hope you're right!
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