Here's why a direct analogue doesn't exist in Sony's lineup (at least not in the same way, and why it's a bit more nuanced than it seems):
* Sony's Strategic Focus: Third-Party Dominance Sony seems very interested in letting third party companies make lenses for its E mount. There are many excellent lenses made by Tamron, Sigma and Samyang that fill this gap. It makes better business sense for Sony to not compete with them.
* Sony's E-Mount Philosophy & History: Sony's mirrorless E-mount system has a different design and history than Canon and Nikon's DSLR systems. Sony prioritized compactness and lighter lenses initially. They might have reasoned that a traditional, larger 24-70mm f/2.8 would be less appealing to early adopters seeking smaller and lighter setups.
* Early Investment in Primes: Sony invested heavily in developing a strong lineup of high-quality prime lenses for the E-mount early on. They focused on lenses like the 35mm f/1.8, 50mm f/1.8/1.4, and other fast primes, which appealed to photographers who wanted exceptional image quality and low-light performance, even if it meant sacrificing the convenience of a zoom.
* Overlap with Existing Lenses: Sony does have lenses that cover a similar range, but they might not tick all the same boxes:
* Sony FE 24-70mm f/2.8 GM: This exists, and it's excellent, but it's considerably more expensive than the Canon and Nikon counterparts. It's in the "G Master" line, representing Sony's highest-end optics. The price point is the main barrier.
* Sony FE 24-105mm f/4 G OSS: A popular and versatile lens, but it's an f/4 aperture, not the faster f/2.8 that many photographers crave.
* Third-Party Options (Sigma, Tamron): As mentioned above, Sigma and Tamron both offer excellent 24-70mm f/2.8 lenses for Sony E-mount. These lenses are generally more affordable than the Sony G Master lens and are often excellent performers. Sony could feel that this market gap is well covered.
* Market Demand & Target Audience: Sony might have believed that their target audience prioritized different features. Early adopters of mirrorless systems often value smaller size and weight, and are willing to pay more for top-tier lenses. They might not have seen the same demand for a "budget-friendly" 24-70mm f/2.8 as Canon and Nikon users.
* Technological Challenges: Designing a compact and high-performing 24-70mm f/2.8 for a mirrorless system can be challenging. The shorter flange distance (the distance between the lens mount and the sensor) in mirrorless systems requires different optical designs. While technology has improved, early designs might have been difficult to achieve without compromising image quality or size.
In summary:
While Sony doesn't have a direct, affordable 24-70mm f/2.8 lens that directly mirrors the classic Canon and Nikon offerings, the situation is more complex. They've pursued a different strategy, focusing on high-end optics, prime lenses, and relying on third-party manufacturers to fill the market gap. The availability of the 24-70mm f/2.8 GM addresses the focal range and aperture, albeit at a premium price, and third party manufacturers like Sigma and Tamron provide more affordable options. Whether that's a good strategy or a missed opportunity is a matter of debate among photographers.