First thing, I don't see it for sale at BandH!!! But iit is listed on Sony's site:
https://electronics.sony.com/imaging/lenses/all-e-mount/p/sel50150gm
It doesn't use TCL, so they should have made it black.
Why? Other than your (and my) preference for black, Sony makes all zooms this large white, there's no arbitrary rule that says black = no TCs and white = yes... I was always skeptical it would take TCs tbh, idk why many took it as a given.
At $4k I would absolutely get rid of my GM primes to use this. 50GM f1.2 and 135GM
I wouldn't... If I was a pro shooting the 135GM I might consider swapping it for the zoom, but I don't see how it replaces much faster (and smaller, and cheaper) 50/85s. It's nice to have all these options tho, E mount stays winning though. Seriously, no other system has this array of options and the gap keeps widening, not narrowing.
For the type of shooting I like to do, I would get a new holy trinity 1635GM, 50150GM, 300GM+bothTCL (and when I want to go small 40G or 24G). Seriously. I would be totally satisfied with this kit, as the only reason I would need a prime is to go small.
That makes sense to me, although I'm still surprised you'd give up the 50GM, just based on how much you've said you like it in the past... Personally I like my primes to be smaller than it, but I still tolerate something much bigger than the 24/40/50 G. I enjoyed the 24G but swapped it for the CV 21...
Ironically I'm now considering the 40G and it's got zilch to do with IQ, I still find it's flare resistance and LoCA handling underwhelming, but I kinda want my small wide/normal option to be weather sealed and have an aperture wheel.
This lens also becomes the 70-200/2.8(3.0) lens for apsc that we have wanted.
I don't think most people shooting APS-C wanted a fully FF f2.8-equivalent option or a 1.34kg zoom, fair point tho.
Now the question is will it be available in the states, and if so when?
I have 0 doubts it'll come to the US... I'd check local camera stores (if that's an option) rather than B&H though. The one I visited in Omaha already had the 16G last week (multiple copies), still backordered at B&H, that happens a lot.
I think this will be a big hit with event shooters, basically any pro that wasn't already sold on the 35-150 but often shoots events will be salivating over this. The 35mm start point is slightly more useful in general (IMO) but I'm sure the GM is sharper, better at flare handling, can shoot >20fps, will work with breathing compensation and match the best AF abilities of an A1/9; and prospective buyers will pay dearly for it.
I gotta say, I'm mildly surprised the MSRP isn't actually $4K+, just a couple hundred short but still, I half expected them to go over that price point.
Edit: If I was shooting a 70-200 or needed one, I'd swap it for this without a second thought. I thought similar of the 35-150 but this takes it a notch further. It's faster and the range is more versatile, if I wanna shoot long I'd go for something much longer (and already do). The 135GM will probably see decreased sales now since it's pinched between this zoom (for pros) and cheaper 135mm options (for enthusiasts).
Perhaps a good time to look for a used bargain (on the 135GM)... I'm happy with the Samyang though, my 21/35/135 trio with it comes out to like 2.2kg (including the A7R IV, would be even less with a C series body, maybe someday).