Wow, Darren, I am impressed: You gave a credit to my almost-1-year-old
message!
I suspect it is a combination of the facts that it is a FF lens and that
it is a fast lens in the focal range < 16 mm, that drive the price up.
Both factors make it more complex from the engineering point of view
(although I'd argue that the latter one probably creates more challenges).
But the former one also allows charging more: people who are ready to pay
for a FF, would be ready to pay for more expensive lenses.
(Cf. 645 lenses)
It would be interesting to see what will be the price of the Pentax
version of this lens. Tamron's prices have held at the initial point
($1.2k) over the past ~11-12 months since the original release.
And in response to Bipin's and John's comments, - besides the lens(es)
co-designed with Tokina, Pentax had also sold Tamron's DA 18-250/3.5-6.3
AL ED [IF] as Pentax:
http://kmp.bdimitrov.de/lenses/zooms/short/DA18-250f3.5-6.3.html .
And I believe 18-270 had a similar story/origin.
Igor
Darren Addy Fri, 12 Feb 2016 06:52:25 -0800 wrote:
Igor originally said:
"It is not as fast as the Sigma 18-35/1.8, but it is 1.5 times more
expensive at this point (preorder @ B&H).
The advantage of that lens is that it goes much wider, and that's what
probably drives the price."
The fact that it is a full frame lens (the 18-35mm f1.8 is APS-C only)
is probably what drives the price.
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