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Sony FE 100-400mm f/4.5 GM OSS Lens
Product Code: 7240793G
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This super telephoto zoom boasts a constant f/4.5 aperture, internal zoom and advanced four-motor autofocus bring professional speed, consistency and handling to this long-range G Master zoom.
Buying Options
We Love
- Constant aperture keeps shutter speeds up as the light fades and subjects keep moving
- Internal zoom stays balanced, so you can follow the unexpected without missing a beat
- Exceptionally fast autofocus helps keep birds, wildlife and fast action within reach
- Outstanding optics pair razor-sharp detail with beautifully soft, natural backgrounds
- Professional handling puts essential controls at your fingertips when every second counts
Key Features
- Constant f/4.5 across the full range maintains brightness and exposure
- XA, ED XA, Super ED and ED glass deliver professional resolution and rendering
- 11-blade aperture and Nano AR Coating II balance fine detail with natural bokeh
- Focus as close as 0.64m with 0.25x maximum magnification for added versatility
- AF tracking up to 120fps on compatible camera bodies
- 95mm front thread plus 40.5mm rear drop-in filter support
- Dust and moisture-resistant construction with a fluorine-coated front element
- 1,840g weight balances substantial reach with professional handling
Product Summary
Made for photographers who regularly follow distant and unpredictable subjects, this generation zoom places emphasis on balance and responsiveness. The barrel remains the same length while zooming, making changes in framing less disruptive when shooting handheld and providing more consistent balance on a monopod or gimbal.
Four XD Linear Motors drive a floating focus system, with significant gains in acquisition and tracking over the previous model. Optical SteadyShot provides support for handheld shooting, panning and more erratic movement, helping when following birds in flight, motorsport and other subjects where both the camera and subject are moving.
Hybrid creators also benefit from reduced focus breathing and suppressed focus and axial shifts while zooming. A Function Ring can be assigned to Power Focus, Preset Focus or APS-C/Super 35 switching on compatible bodies, while four focus-hold buttons provide access from different shooting orientations.
Observational Behaviour
After just a couple of hours with the lens, Gareth noted it felt modestly lightweight for a full-frame super-telephoto, though extended handheld use still made itself felt. The zoom action is fast and smooth, and autofocus is reliable even with teleconverters attached. Image quality impressed him across a range of subjects, performing well not just for wildlife and sports but also for portraits.
In More Detail
Constant f/4.5 Aperture
This model maintains a constant maximum aperture throughout the zoom range, allowing photographers to zoom without exposure changes or shutter speed reduction at longer focal lengths. Consistent aperture behaviour also maintains uniform subject separation and background rendering across compositions when tracking moving subjects.
GM Optical Design
The G Master optical formula consists of 28 elements in 20 groups and includes XA, ED XA, Super ED and ED elements to suppress chromatic aberration, spherical aberration and onion-ring bokeh. Nano AR Coating II applies a uniform anti-reflective layer across lens surfaces to reduce flare and ghosting in strongly backlit conditions.
Bokeh Quality
An 11-blade circular aperture contributes to smoother defocused rendering and more rounded specular highlights. Individual elements are fine-tuned during production to maximise overall bokeh quality, while XA elements help reduce onion-ring artefacts in out-of-focus highlights.
Teleconverter Support
The lens is compatible with the SEL14TC 1.4x and SEL20TC 2.0x teleconverters, extending focal length coverage to 140-560mm and 200-800mm respectively. This allows rapid adaptation to distant or unpredictable subjects without changing lenses in the field.
Floating Focus System
Four XD Linear Motors drive a floating focus mechanism for high-speed autofocus acquisition and accurate subject tracking. The floating focus design reduces aberration at close-focus distances while helping shorten the physical structure compared to more conventional super-telephoto zoom designs. Autofocus performance improves by up to three times over the previous generation.
120fps Tracking Support
When paired with compatible Alpha cameras such as the A9 III, the leopticns supports autofocus tracking during continuous shooting at up to 120fps. Advanced control algorithms and XD Linear Motor precision maintain focus accuracy on fast-moving subjects including birds in flight, motorsport and sports action.
Internal Zoom Design
This maintains physical length throughout the zoom range. The internal zoom construction keeps weight distribution more consistent during handheld tracking and monopod use while reducing the risk of dust and moisture entering the lens mechanism during outdoor use.
Zoom Torque Switch
A dedicated zoom smoothness switch allows photographers to choose between Smooth and Tight torque settings depending on shooting style. Smooth mode supports faster focal length adjustments during tracking, while Tight mode provides firmer resistance for more controlled framing adjustments.
Weather Sealing
Dust- and moisture-resistant sealing surrounds buttons and rings for improved reliability in outdoor conditions. A fluorine coating on the front element helps resist contamination, while a built-in security slot supports third-party locking accessories for remote setups and fixed-position installations.
Function Ring
The Function Ring provides direct access to selected shooting controls depending on the connected camera body. Available functions include Power Focus, Full Frame and APS-C/Super 35 switching, and Preset Focus recall. On high-resolution cameras such as the Alpha 1 and Alpha 7R series, APS-C crop modes can provide additional effective telephoto reach while retaining substantial image resolution.
Read our Sony FE 100-400mm f/4.5 GM 2026 Review for a closer look at the new constant aperture super-telephoto zoom, including autofocus performance, image quality and how it compares with the original 100-400mm GM OSS.
Frequently Asked Questions
How does it compare with the 200-600mm?
The 200-600mm provides greater native reach and may be preferable when smaller or more distant subjects dominate your photography. This option starts considerably wider and is brighter throughout their overlapping focal lengths, making it more flexible when subject distance changes quickly or available light is limited.
What happens when I add a teleconverter?
The 1.4x converter provides a 140-560mm f/6.3 combination, while the 2x extends coverage to 200-800mm at f/9. Both provide additional reach while retaining autofocus, although the reduction in maximum aperture becomes an important consideration in lower light.
Can I use it on an APS-C camera?
Yes. A compatible APS-C E-mount body provides an angle of view equivalent to 150-600mm on full-frame, which can be useful for distant wildlife and sport while retaining the complete image area recorded by the smaller sensor.
Why are there front and drop-in filter options?
Conventional 95mm filters attach at the front, while the rear holder accepts smaller 40.5mm drop-in filters. The latter provides a more compact way to use certain filters without requiring a large accessory across the front element.
Should I consider the original version instead?
Yes. The earlier model is lighter and more compact, costs less and reaches 0.35x magnification rather than 0.25x, making it particularly attractive for travel and closer subjects. This version is the stronger choice when a brighter long end, faster tracking and internal zoom take priority.
Specifications
|
Mount |
Sony E-mount |
|
Format |
35mm full frame |
|
Focal-Length (mm) |
100-400 |
|
35mm equivalent focal-length (APS-C) |
150-600 |
|
Lens Groups / Elements |
20-28 *Including one filter |
|
Angle of view (APS-C) |
16°-4°10' |
|
Angle of View (35mm) |
24°-6°10' |
|
Maximum aperture (F) |
4.5 |
|
Minimum Aperture (F) |
32 |
|
Aperture Blades |
11 |
|
Circular Aperture |
Yes |
|
Minimum Focus Distance |
0.64 (W) -1.5 (T) |
|
Maximum Magnification ratio (x) |
0.25 |
|
Filter Diameter (mm) |
95/40.5 (Drop-in filter) |
|
Image stabilisation (SteadyShot) |
Optical SteadyShot |
|
Zoom system |
Manual |
|
Teleconverter compatibility (x1.4) |
SEL14TC |
|
Teleconverter compatibility (x2.0) |
SEL20TC |
|
Hood Type |
Round shape, bayonet type |
|
Dimensions (Diameter x Length) |
119.8 x 328 |
|
Weight |
1840 g |
What's in the Box
- Sony FE 100-400mm f/4.5 GM OSS Lens
- Hood ALC-SH187
- Lens front cap ALC-F95S
- Lens rear cap ALC-R1EM
- Case (soft case)
- Lens strap
- Case strap
- Slot-in filter
Thinking of choosing finance?
Finance is a great way to spread the cost of your purchase. To make it easy we have teamed up with Omni, one of the UK’s leading finance specialists, so that you can apply for and complete a loan application quickly, easily and informatively.
Omni Capital Retail Finance Ltd which is a credit provider/ lender regulated by the Financial Conduct Authority whose finance options are best suited for you and your purchase.
Simply add the items you love to your basket. Once you are at the checkout select the finance option that suits you and choose Omni. The quick application form is simple and should take no more than a couple of minutes to complete and you will receive a decision instantly. Easy!
Use our finance calculator to check the impact of various loan values, terms and interest rates on the total amount you need to pay and the monthly repayments.
Representative example:
Buy a £1,200.00 camera and pay a 10% deposit of £120. You'll borrow £1,080 over 24 months with an annual interest rate of 14.9% (fixed) with a first payment of £52.04 followed by 23 monthly repayments of £51.83. The total amount payable will be £1,244.13 14.9% APR Representative.
Finance available See options |
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Check your eligibility
To be considered for finance, you will need to meet all of the following criteria:
- Are at least 18 years old
- Are in regular full or part-time employment (minimum 1 hour per week or £10,000 income per annum), unless you are retired and receiving a private or company pension, or you are in receipt of disability living allowance
- Are a permanent UK resident and have lived in the UK for at least 3 years
- Have a UK bank account capable of accepting Direct Debits
- Have a good credit history with no late payments, Debt Relief Orders, County Court Judgments or bankruptcies.
Please note that, due to calculations, your monthly repayment may differ very slightly from what you were expecting. Please check your monthly repayment figure before proceeding
Missed or late payments will result in fees and additional interest on your loan and can also affect your credit file and your ability to obtain credit in the future.
Credit is subject to status, UK only, 18+
Park Cameras Limited is a credit broker, not a lender and is authorised and regulated by the Financial Conduct Authority (FRN 680161). We do not charge you for credit broking services. We will introduce you exclusively to finance products provided by Omni Capital Retail Finance Ltd.
Omni Capital Retail Finance Ltd which is a credit provider/ lender regulated by the Financial Conduct Authority, Firm Reference Number: 720279. For more information please go to www.omnicapitalretailfinance.co.uk/contact/customer or visit www.omnicapitalretailfinance.co.uk.
Find out more about paying with finance here and Omni Capital Retail Finance Ltd terms here
Our Verdict
The Sony FE 100-400mm f/4.5 GM OSS addresses many of the handling compromises photographers traditionally accept with long telephoto zooms. The internal zoom design keeps the lens balanced during handheld tracking, while the constant aperture maintains consistent exposure throughout the zoom range. Faster autofocus performance also improves reliability when photographing birds in flight, motorsport and unpredictable action.
For wildlife, aviation and outdoor sports photographers who spend long periods shooting handheld or tracking fast-moving subjects, this is one of Sony’s most capable professional telephoto zooms to date.
Trade in your existing equipment with Park Cameras and you can use the cash to offset the cost of upgrading to this super tele zoom.
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Condition guide
Our used products are subject to wear and tear in comparison to brand new products. This also applies to accessories that are supplied with the camera including batteries which may have a lower optimum performance level/life expectancy.
- Like New – The equipment is in a condition as if you have just bought it from the manufacturer. The item is still considered to be ‘Like New’ even without the original packaging and accessories. The product has been fully tested and is in perfect working order. Lenses are optically clear. There may be light dust present that will not effect the imagery.
- Excellent – The equipment should be close to being ‘Like New’ but there may be some small cosmetic blemishes that lower its grade. The product has been fully tested and is in perfect excellent order.
- Cameras – Should have no marks on the LCD screen
- Lenses – Should have no marks on the elements and optically clear. There may be light dust present that will not effect the imagery.
- Very Good – The equipment may have some slight cosmetic wear to the paintwork and cosmetic blemishes with only light signs of use and the product has been fully tested and is in great working order.
- Cameras – The LCD screen may have small signs of wear that does not affect its display
- Lenses – The mount of the lens will start to show signs of wear
- Good – The equipment is showing more obvious signs of cosmetic wear and blemishes, but the product has been fully tested and is in great working order.
- Cameras – LCD screen may have scratches or wear that is starting to affect the display.
- Lenses – May have slight dust inside that does not affect images. The mount shows signs of use.
- Well Used – The equipment will show significant signs of wear. The paintwork will be coming away in large areas exposing the metal work, but the product has been fully tested and is in great working order.
- Cameras – LCD screen is heavily worn either by de-lamination or has scratches to it. Rubber grips are starting to come away from the body.
- Lenses – The lens has dust inside that may affect images. The rubber zoom/focus ring is coming away from the barrel of the lens.
*All of our used items are listed with the accessories that are included. If they are not listed, then they will not be supplied at the point of purchase.
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Our used stock goes through a rigorous quality process. Each item is carefully inspected by our experienced specialists during the trade-in process and checked again before being listed for sale. This ensures you can shop with total peace of mind, knowing your gear has been thoroughly tested and approved.
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Shop our used gear with total confidence. Every item comes with upto a 12-month warranty (unless stated otherwise). Get the best brands for great value, and peace of mind all in one place. Don’t miss out — upgrade your kit today!
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