that image looks very like 28300 though
Sorry, but no, it doesn't.
All-in-one means compromises somewhere, though.
petapixel.com
But the blurred image was a joke anyway, so ...
The Sony lens isn't much more than a rumour at this point, so what you're seeing is nothing but a mock-up that can look like anything. But yes, it'd be a smart move to come out with a high-performing superzoom lens - Tamron has laid the groundwork with their 28-200mm f/2.8-5.6 that's portable and optically competent, and even though Nikon, Canon and Panasonic have gone with much slower aperture ranges, their lenses are performing well (though Canon and Panasonic have made more compromises than Nikon - and the Sony 24-240mm still trails them optically; no wonder, considering its age) and, above all, are small and compact, including optical stabilisation.
My own Z 24-200mm f/4-6.3 only shows one major optical flaw, CA at wide angles (so, reducing the asset of
having a wider end - duh ...), but is otherwise delivering impressive IQ. Nikon just went for the other end of the spectrum with their Z 28-400mm f/4-8 - definitely
not a performance monster, but the range is simply fantastic. Now Tamron has followed suit - and I can definitely see why. Once more, they managed to come out with an impressively compact lens considering its specs, as was the case for the 28-200mm. The 28-300mm isn't meaningfully bigger than the Z 24-200mm - that's a feat in itself:
Compare unlimited number of cameras with lenses, see how compact or bulky a camera is and sort by height, width, depth and weight.
camerasize.com
Just a little remark, though: Regarding the poster, apart from the 24-50mm f/2.8G, he wasn't very accurate so far, but the year's not over, and driving the rumour mill is a fickle business at the best of times. So I'd give him the benefit of the doubt this time around.
If you like rumours, though, here's another intriguing one:
I recently reported that Tamron will be releasing a new zoom lens. I received a tip that the new lens will be a 28-180mm f/2.8 Di III VC VXD. The official announcement is expected in mid-September. The new lens will be targeted at users who need a larger zoom range than the current Tamron 35-150mm f/2-2.8 lens, […]
photorumors.com
Judging from the Tamron 35-150mm f/2-2.8, this'll be quite a big lens, but it'd still be a major achievement. I was on the fence about the 35-150mm when it came out in Z mount - I'm not a portrait shooter, so I wouldn't benefit from the extra speed as much as people who do everything portraiture related and can basically stick with one zoom. A fast 28-180mm would add just the right amount of reach for my needs ... But there are limits to what I'm prepared to carry even so.
Here's a little apples-to-oranges comparison - while I found the Z 28-400mm quite bearable on-camera, I still decided to stick with its smaller brother (that's a known quantity for me that I'm quite satisfied with):
Compare unlimited number of cameras with lenses, see how compact or bulky a camera is and sort by height, width, depth and weight.
camerasize.com
For added accuracy, here's the same, Nikon only:
Compare unlimited number of cameras with lenses, see how compact or bulky a camera is and sort by height, width, depth and weight.
camerasize.com
That said, the Tamron 28-75mm f/2.8 G2 I'm currently using on my Z mount cameras has hit home - for its comparatively small size and weight, its optical quality is amazing. One of my best standard zooms (and I own both the Z 24-70mm f/2.8 S and the Z 24-120mm f/4 S as well - and similar lenses for other systems).
So, it's all a matter of the relation between optical performance and portability - the extra speed might come at too much of a cost, but that remains to be seen. I know several pros who swear by the Tamron 35-150mm, moaning a bit about its bulk, but praising everything else about it. And after getting to know the 28-75mm f/2.8 G2, I can definitely see why.
Sony's got their work cut out for them.
M.