Sony FE 100-400mm F4.5 GM OSS Lens Pre-Order / In Stock / Availability Tracker

Last Update: May 15, 2026

Sony has announced the Sony FE 100-400mm F4.5 GM OSS, a full-frame G Master telephoto zoom for E-mount cameras. It succeeds the earlier FE 100-400mm F4.5-5.6 GM OSS (2017) with a constant F4.5 maximum aperture, internal zoom, faster AF, and a larger, heavier build aimed at wildlife, birding, sports, and photojournalism. The lens is expected to ship in June 2026 at approximately $4,299.99 USD (and $5,599.99 CAD) through Sony and authorized dealers.

This page tracks Sony FE 100-400mm F4.5 GM OSS pre-order, in stock, restock, and availability at major retailers. Use the table below and sign up for email alerts when the lens goes live for order or when inventory returns.

Sony FE 100-400mm F4.5 GM OSS overview

DPReview describes the lens as a spiritual successor to the variable-aperture 100-400mm F4.5-5.6 GM OSS, with key upgrades: constant F4.5 through 400mm, internal zoom (constant physical length while zooming), and a more complex optical stack. Sony’s press release (via DPReview) highlights G Master resolution and bokeh, Nano AR Coating II, an 11-blade circular aperture, and compatibility with optional teleconverters for extended reach.

Key specifications

• Focal length: 100–400mm
• Maximum aperture: F4.5 (constant)
• Mount: Sony FE / E
• Optical design: 28 elements in 20 groups; includes 2 Super ED, 3 ED, 1 ED XA, 1 XA (per DPReview product specs block)
• Image stabilization: Yes (OSS)
• Autofocus: XD Linear motors; Sony claims up to ~3× faster AF vs. the prior 100-400mm F4.5-5.6 GM OSS in stated test conditions (see Sony footnotes on DPReview)
• Minimum focus: 0.64 m at wide end; 1.5 m at long end (per DPReview article body)
• Weight: 1,840 g (~4.06 lb)
• Dimensions: ~120 mm diameter × 328 mm length; 95 mm front filter thread; 40.5 mm drop-in rear filter (per DPReview)
• Weather sealing: Dust and moisture resistant design; fluorine front coating (Sony notes it is not fully sealed against all water ingress)

Controls and handling

Per DPReview’s hands-on notes, the lens includes AF/MF and related switches, focus limiter, OSS mode control, four customizable focus hold buttons, a toggle function ring, a zoom ring with adjustable tension and a short ~quarter turn from 100mm to 400mm, a rotating tripod foot with clicked or clickless detents, and a drop-in 40.5mm filter holder near the mount as an alternative to 95mm front filters.

Sony FE 100-400mm F4.5 GM OSS FAQ

Is the Sony FE 100-400mm F4.5 GM OSS available for pre-order?

Retail listings and pre-order windows vary by region and retailer. Check the tracker table above and the official Sony product page for the latest status leading into the June 2026 window.

How does this lens compare to the older FE 100-400mm F4.5-5.6 GM OSS?

The new model trades a variable aperture design for constant F4.5 at 400mm, uses internal zoom, and is larger and heavier, with Sony positioning it as a higher-end option for speed-critical shooting. DPReview notes a substantially higher price than the older lens.

What cameras benefit most from the faster AF claims?

Sony’s footnotes reference comparisons and burst behavior in specific conditions; high-speed bodies such as the Alpha 9 III are often cited for maximum drive performance—verify compatibility on Sony’s support pages for your camera.