Sony FE 400mm f/4.5 and 600mm f/6.3 Hands-On: Super-Telephoto Reach Without the Weight

Shooting wildlife from the passenger seat of a car usually means wrestling with a massive lens that takes up half of the cab. I recently took a slow cruise through the Lake Apopka Wildlife Drive to put two new, unreleased Sony GM lenses to that very test.

Lake Apopka Wildlife Drive is an amazing 11-mile loop packed with gators, herons, and ospreys, but you’re mostly confined to your vehicle. Usually, capturing wildlife in this scenario means dealing with the significantly greater weight of traditional Sony 400mm f/2.8 or 600mm f/4 primes. 

Trying to pan a heavy lens inside a car is usually super frustrating, but that frustration is no longer an issue with the upcoming Sony FE 400mm f/4.5 GM OSS and FE 600mm f/6.3 GM OSS lenses. They offer a highly capable, lightweight alternative for serious shooters who want mobility and image quality over faster apertures. 

A Small Footprint for Better Efficiency

When you're pinned in the passenger seat of a car tracking an osprey in flight, it helps to have gear that's easy to manage. These two new Sony GM primes claim the title of being the world's lightest super-telephoto primes in their class.

Incredibly, both lenses weigh under 1,000 grams. The 400mm f/4.5 comes in at approximately 994 g, while the 600mm f/6.3 sits right at 995 g, excluding the tripod foot. To make things easier, Sony used a new optical design with a single front lens element that shifts the center of gravity back toward the camera body. This improved handling makes it comfortable to shoot handheld out the window for extended periods.

Precision Focus and Beautiful Rendering

Photographing sudden, irregular movements from birds and wildlife requires an autofocus system that locks on consistently. Both lenses are powered by two XD (extreme dynamic) Linear Motors, with one motor driving each focus group. Because they feature internal focusing, the physical dimensions of the lenses never change during shooting.

Optically, both lenses feature three Super ED elements and one ED element, effectively suppressing chromatic aberration for high resolution across the entire frame. When you do isolate a subject, the 11-blade circular aperture, combined with individual lens calibration, delivers smooth, refined G Master bokeh. Both lenses also feature Nano AR Coating II to suppress flare and ghosting when you're shooting backlit subjects across the water.

Stabilization and Extending Your Reach

Shooting handheld at these focal lengths requires reliable stabilization, and both lenses feature Optical SteadyShot with three selectable operating modes. I found Mode 3 to be especially useful for tracking and panning at the wildlife drive.

If you need even more reach to fill the frame with a distant heron, both primes are fully compatible with Sony's SEL14TC 1.4x and SEL20TC 2.0x teleconverters. Throwing a 2.0x teleconverter on the 600mm f/6.3 turns it into a 1200mm f/13 setup, while the 400mm f/4.5 becomes an 800mm f/9.

Final Thoughts

The Sony FE 400mm f/4.5 GM OSS and FE 600mm f/6.3 GM OSS are amazing lenses for hybrid shooters who want true super-telephoto reach without the traditional size and weight. Available in October 2026, the 400mm is expected to be priced around $2,699 to $2,899, while the 600mm will sit approximately between $3,699 and $3,899. Having the ability to comfortably handhold G Master glass from the front seat of a car makes these lenses a dream addition to any wildlife shooter's kit.

Are you leaning toward the 400mm for its slightly faster aperture, or the 600mm for maximum native reach? Share your thoughts on these lightweight primes in the comments below!