Canon EF 100-300mm f/4 L IS with built in 1.4x TC sounds like a much better proposition. In my mind this sort of lens will satisfy the needs of the people looking for a replacement to the 100-400 push-pull zoom and it sits obediently below the 200-400mm f/4 1.4x TC.
With TC-on that would give 140-420 f/5.6. If priced between $2100-2600 and the IQ at f/4 matched the 100mm macro (non-L) and 300mm IS then I'd say they have a winner.
P.S. (100macro non-L) + (300mm f/4L IS) + (1.4x TC) = $2550
The notion of a 100-300 f/4 + 1.4TC is also intriguing. It's wishful thinking that it's price would equal the $2,550 sum of the prices of a 100 macro + 300 f/4 + 1.4x TC, but I'd willingly shell out up to $1,000 more for a lens like this.
Of course, but I can always try to be optimistic. Sure I'd also be willing to pay a bit more especially considering it would offer an interesting alternative to Sigma's 120-300mm f/2.8, which is a bit soft (at f/2.8) anyway.
« Last Edit: February 06, 2014, 07:58:50 AM by StudentOfLight »
Eos: 1Ds-III, 5D-III, 6D, 60D | Canon EF: TSE-24L-II, 16-35L-II, 24L-II, 35L, 40STM, 100f/2.8, 135L | Wishlist: TSE-17L, 200f/2L
Tamron: 24-70VC, 70-200VC, 150-600VC | Samyang: 8mm-T3.8, 14mm-T3.1
Crazy Ideas: TSE-90L-II, 40f/1, 100f/1.4, 35-85f/2, 100-300f/4_1.4xInt, 500f/5.6_1.4xInt