Sony has launched the FE 100-400mm F5.6-8 OSS Lens (SEL100400B.SYX) in India. This full-frame super-telephoto zoom is available at a launch price of Rs.83,990 (Lowest Price on August 23, 2026). The MRP price is Rs.94,990.
Key specs highlights include a 100-400mm focal range, an F5.6-8 variable maximum aperture, Optical SteadyShot stabilisation, and a 654g body weight.
The Sony SEL100400B.SYX is available in Black.
Pricing & Availability
| Model | Launch Price | Link |
|---|---|---|
| Sony FE 100-400mm F5.6-8 OSS (SEL100400B.SYX) | Rs.83,990 | Amazon India↗ |
MRP for this lens is Rs.94,990. Sony also lists the SEL100400//ZSYX order code against the same FE 100-400mm F5.6-8 OSS lens.
What We Like About the Sony FE 100-400mm F5.6-8 OSS (SEL100400B.SYX)
- 654g weight: low for a 400mm full-frame telephoto zoom, which keeps handheld shooting practical without a monopod
- Optical SteadyShot: in-lens stabilisation works alongside a camera body’s own system at the long end of the zoom
- 0.41x maximum magnification with a 0.86m minimum focus distance at 400mm: close enough for small-subject work without a dedicated macro lens
- SEL14TC and SEL20TC teleconverter support: extends reach to 560mm and 800mm respectively
- 9-blade circular aperture: the blade count and circular design control the shape of out-of-focus highlights
Where the SEL100400B.SYX Sits in Sony’s Lens Lineup
There are no G or G Master markings on this lens, and neither designation appears in its model name. The SEL100400B.SYX belongs to Sony’s standard full-frame E-mount lineup, not the G Series or the G Master line, which are built to different optical and mechanical specifications. Performance should not be expected to match a G Series or G Master telephoto.
Sony’s own G Master telephoto at this focal range, the FE 100-400mm F4.5 GM OSS (SEL100400MC), is the separate, higher-specified option, with a constant F4.5 aperture and a 1,840g body against the 654g here.
Focal Range and Aperture
The zoom covers 100-400mm on a 35mm full-frame body. Mounted on an APS-C Sony body, the equivalent field of view works out to 150-600mm.
Maximum aperture is variable across the range, running from F5.6 at the wide end to F8 at 400mm. Stopped down, the lens reaches F32 at 100mm and F45 at 400mm. Angle of view is 24° to 6°10′ on full-frame, and 16° to 4°10′ on APS-C.
The aperture uses 9 blades in a circular design.
Optical Design and Focusing
Sony’s optical formula for the SEL100400B.SYX uses 15 elements arranged in 10 groups.
Minimum focus distance shifts across the zoom, from 1.13m at 100mm down to 0.86m at 400mm. Maximum magnification ratio is 0.41x, recorded at the long end.
Stabilisation is handled by Optical SteadyShot. Zooming is manual, not powered.
Teleconverter Compatibility
Two Sony teleconverters work with this lens:
- SEL14TC (1.4x): takes the long end to 560mm
- SEL20TC (2.0x): takes the long end to 800mm
Both attachments cost light. Starting from F8 at 400mm, the SEL14TC puts the effective maximum aperture at roughly F11 at 560mm, and the SEL20TC at roughly F16 at 800mm. That is before any of the optical cost of adding elements to the light path.
The teleconverters are supported, but this is not a fast lens to begin with, and the results at 560mm or 800mm should not be expected to match a G Master telephoto with the same teleconverter fitted.
Filter Thread, Size and Weight
| Specification | Details |
|---|---|
| Filter Diameter | 67 mm |
| Dimensions (D x L) | 78.2 × 164.5 mm (3.13 × 6.5 in) |
| Weight | 654 g (23.1 oz) |
| Hood Type | Round shape, bayonet type |
Sony FE 100-400mm F5.6-8 OSS (SEL100400B.SYX) Specifications / Technical Details
| Specification | Details |
|---|---|
| Model | Sony FE 100-400mm F5.6-8 OSS |
| Model Numbers | SEL100400B.SYX, SEL100400//ZSYX |
| Mount | Sony E-mount |
| Format | 35 mm full-frame |
| Focal Length | 100-400 mm |
| Equivalent Focal Length (APS-C) | 150-600 mm |
| Lens Groups / Elements | 10 / 15 |
| Angle of View (35 mm) | 24° to 6°10′ |
| Angle of View (APS-C) | 16° to 4°10′ |
| Maximum Aperture | F5.6-F8 |
| Minimum Aperture | F32-F45 |
| Aperture Blades | 9, circular |
| Minimum Focus Distance | 1.13 m (wide) / 0.86 m (tele) |
| Maximum Magnification Ratio | 0.41x |
| Filter Diameter | 67 mm |
| Image Stabilisation | Optical SteadyShot |
| Zoom System | Manual |
| Teleconverter (1.4x) | SEL14TC |
| Teleconverter (2.0x) | SEL20TC |
| Hood | Round shape, bayonet type (ALC-SH188) |
| Dimensions (D x L) | 78.2 × 164.5 mm |
| Weight | 654 g |
| Colour | Black |
What’s in the Box
- Sony FE 100-400mm F5.6-8 OSS Lens (SEL100400B.SYX)
- Lens Hood ALC-SH188
- Lens Front Cap ALC-F67S
- Lens Rear Cap ALC-R1EM
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Note: Specifications listed above are based on available information and may not be 100% accurate. Please visit the official Sony website or Amazon product page to verify complete and up-to-date specifications before making a purchase decision.
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