Plainsman said:
I'd much prefer a new Canon 300/4 IS with very fast AF ahead of this one.
Or even a lightweight 300/5.6 IS STM lens from that factory in Malaysia which gives us the reputedly excellent/cheap 55-250 STM - sorry for being slightly off topic!
I'll take one of each.
Actually it's a good point that a basic 300mm f5.6 Prime would cost next to nothing to make, they could probably get it on the market for $200. Add USM and IS and charge $500 and all of a sudden you have one of the best compact telephoto lenses on the market.
But then we just got a rumor for effectively that lens in a zoom. It would be just be neat to see what it would look like as a prime.
Speaking of compact, one must wonder what Canon could do with their newly perfected DO tech to cut down an already compact telephoto lens.
Really that's where this should be headed, Canon already has the best budget birding lens on the market and that's probably never going to change, it will never be obsolete, there's no point in developing the same thing twice.
So, how much would you pay for a 400f5.6 IS DO?
Same deal for the 300f4IS, it's still great, but it certainly could be chopped down a bit.
Here's the specs of that lens compared to the recent Nikon 300f4PF comparison. They basically took 1/3 off the length.
http://www.the-digital-picture.com/Reviews/Lens-Specifications.aspx?LensComp=1040&Lens=111&Go.x=3&Go.y=17&Go=Go&Units=E