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Sony FE 400–800mm F6.3–8 G OSS vs Sony FE 400mm F4.5 GM OSS

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

SonyFE 400–800mm F6.3–8 G OSSSonyFE 400mm F4.5 GM OSS
Overview
ReleasedMarch 2025September 2026
Optics
Lens typeZoomPrime
Focal length400–800 mm400 mm
Maximum aperturef/6.3–8f/4.5
Minimum aperturef/36–45f/32
Optical construction27 elements in 19 groups22 elements in 16 groups
Special elementsSix ED elementsThree Super ED elements and one ED element
CoatingsFluorine coating on front elementNano AR Coating II; fluorine front-element coating
Diaphragm11 rounded blades11 rounded blades
Angle of view6°10′–3°10′ full frame; 4°10′–2° APS-C6°10′ full frame; 4°10′ APS-C
Mount and compatibility
MountsSony ESony E
Image circleFull frameFull frame
Image circle detailFull-frame coverage; 600–1,200 mm equivalent field of view on APS-CFull-frame coverage; 600 mm equivalent field of view on APS-C
Teleconverter supportCompatible with SEL14TC and SEL20TC; 2× converter extends maximum physical focal length to 1,600 mmCompatible with SEL14TC and SEL20TC; Sony confirms up to 800 mm with 2×. Amateur Photographer gives 840 mm in one paragraph; the physical 400 mm focal length and 2× factor give 800 mm.
Focus and stabilisation
AutofocusYesYes
Minimum focus distance1.7 m2.5 m
Maximum magnification0.23×0.18×
Optical stabilisationYesYes
Autofocus detailTwo linear motors; full-time DMFTwo XD linear motors; up to 120 fps AF/AE tracking with Alpha 9 III under Sony test conditions, not a universal camera limit
Focus distance detailMinimum focus 1.7 m at 400 mm and 3.5 m at 800 mm; PetaPixel rounds the long-end distance to 3 m, so the maker value is used–
Stabilisation detailOptical SteadyShot; compatible stabilised bodies provide coordinated stabilisation; no maker stop rating published hereBuilt-in Optical SteadyShot; coordinated stabilisation and Active Mode require compatible cameras. Sony publishes no stop rating.
Video featuresOptical design suppresses focus breathingBreathing compensation with compatible cameras
Design
Dust and moisture resistantYesYes
Filter diameter105 mm95 mm
Maximum diameter119.8 mm108 mm
Length346 mm242 mm
Weight2,475 g994 g
ControlsThree customisable focus-hold buttons, full-time DMF switch and focus-range limiterFour customisable focus-hold buttons, function ring, focus-range limiter, full-time DMF, AF/MF and stabilisation mode switches
Filter detail–95 mm front filter; Amateur Photographer’s table gives 85 mm, but maker specification is used
Zoom designInternal zoom maintains lens length and keeps the centre of gravity within a small range–
Weather resistanceDust- and moisture-resistant design; not guaranteed completely dust- or moisture-proofDust- and moisture-resistant design; not guaranteed completely dust- or moisture-proof
Weight detailApproximately 2,475 g including the fixed tripod foot; separate hood, caps and strap excludedApproximately 994 g excluding tripod mount; separately supplied hood, caps, straps and case excluded
Tripod mountNon-removable rotating tripod footSupplied tripod mount; reviews note the foot has no integrated Arca-Swiss plate
Lens hoodALC-SH181 round bayonet hood with lock button and filter-access openingALC-SH189 round bayonet hood
In the boxALC-SH181 hood, ALC-F105S front cap, ALC-R1EM rear cap and lens strap; no case listed by Sony JapanALC-SH189 hood, ALC-F95S front cap, ALC-R1EM rear cap, soft case, lens strap, case strap and tripod mount
Release detailSony UK announced on 26 February 2025 with March 2025 availability and an approximate £2,550 list price; first-sale precision remains the monthSony UK announced on 15 September 2026 with availability from the end of September 2026; exact first-sale day is not published. Sony Japan gives 9 October 2026 for that market. UK approximate launch price is £2400.

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