Head-to-head · used lens buying intelligence
Sony FE 70–300mm vs Sigma 100–400mm DG DN: Which Used Telephoto Is Better?
These Sony E-mount full-frame telephoto zooms address different gaps in a camera bag. Sony's 70–300mm starts wide enough for a short-telephoto portrait or travel detail and provides useful close-focus magnification. Sigma's 100–400mm extends the long end for more distant wildlife and field sports, but starts tighter and is heavier. Buying used is about the extra reach you need, condition, and complete accessories—not an automatic preference for the biggest number.
Editorial research, not a claim of hands-on laboratory tests. We may earn a commission from qualifying retailer purchases at no extra cost to you.Which lens should you choose?
Choose the Sony FE 70–300mm for varied travel, moderate-distance nature subjects and close-up details, especially when weight and the wider 70mm end matter. Choose the Sigma DG DN 100–400mm for wildlife or outdoor sports when 300mm leaves too much cropping, provided the larger lens and slower long-end aperture fit your conditions.
Outdoor travel, near-to-moderate wildlife, flowers and a lighter telephoto kit with a 70mm starting point.
Photographers prioritizing 400mm framing for distant outdoor wildlife and sport who can accept a heavier lens and narrower starting angle.
Specifications that change the decision
Comparison at a glance
The specifications come from manufacturer documentation. They are provided for purchase decisions, not as invented sharpness, autofocus-speed or durability test scores.
| Consideration | Sony FE 70–300mm f/4.5–5.6 G OSS | Sigma 100–400mm f/5–6.3 DG DN OS Contemporary (Sony E) | What it means |
|---|---|---|---|
| Mount and image coverage | Sony FE E-mount / full frame | DG DN Contemporary for Sony E / full frame | Verify Sony E specifically: the Sigma 100–400mm name also exists in other mounts and generations. |
| Focal length | 70–300mm | 100–400mm | Sony starts wider for close subjects; Sigma reaches 33% farther at the long end. |
| Maximum aperture | f/4.5–5.6 variable | f/5–6.3 variable | Neither is a fast constant-aperture option for difficult low-light action. |
| Manufacturer listed weight | 854g | 1,140g (Sony E version) | Sony is approximately 286g lighter, meaningful during long handheld outings. |
| Minimum focus / magnification | 0.9m / 0.31× | 1.12–1.6m / maximum 1:4.1 | The Sony has more documented close-up magnification for flowers and details. |
| Filter diameter | 72mm | 67mm | Check whether you already own filters or accessories for either thread. |
| Stabilization | Sony Optical SteadyShot | Sigma OS | Both reduce camera shake, but neither freezes animal or athlete movement. |
Purchasing options · verified when available
Compare current used listings
Prices below apply to the specific eligible retailer offers, not every grade or copy of the lens. KEH prices are withheld if their independently monitored feed is stale; eBay listings must meet the recent-refresh requirement. Confirm shipping, returns, accessories and final stock with the merchant.
Sony FE 70-300mm f/4.5-5.6 G OSS AF E-Mount Lens
Currently eligible used purchasing options
Sigma 100-400mm f/5-6.3 DG DN OS C (Contemporary) Full-Frame Autofocus Lens
Currently eligible used purchasing options
Lowest tracked KEH offers: Sony FE 70–300mm f/4.5–5.6 G OSS: $817 (Excellent); Sigma 100–400mm f/5–6.3 DG DN OS Contemporary (Sony E): $825 (Excellent). The listed-price difference is $8, but these may be different condition grades or include different accessories. It is not a like-for-like quality-adjusted saving. Check individual listing details and total checkout costs.
Editorial purchase analysis
Where the differences matter
Deciding between 300mm and 400mm reach
At the same subject distance and sensor format, a 400mm lens produces a tighter field of view than a 300mm lens. That is useful for wildlife that cannot be approached, but will not overcome poor light, atmospheric haze or an unsuitable focusing technique. You may still need to crop for small distant birds.
Sony begins at 70mm, while Sigma begins at 100mm. If you frequently move between a nearby person and a distant scene, the Sony's wider starting point can save a lens change. Photographers committed primarily to birds or sports from sidelines may prefer Sigma's longer end.
Weight, close focus and handling in everyday use
Sony lists the FE 70–300mm at 854g; Sigma lists the Sony E DG DN Contemporary 100–400mm at 1,140g. The extra 286g is noticeable on a long hike, especially when combined with a heavy camera body and tripod head. Neither specification guarantees how comfortable the combination will feel in your hands.
Sony specifies a 0.9m minimum focus distance and 0.31× maximum magnification, useful for small subjects without a macro lens. Sigma publishes a minimum focus range of 1.12–1.6m and maximum magnification of 1:4.1 at 400mm. Both are telephoto zooms, not substitutes for specialist macro work.
Used condition, accessories and total value
Check lens elements for haze, fungus and scratches; test autofocus, stabilization, zoom action and contacts. Compare the precise Sony SEL70300G against the Sigma 100–400mm DG DN OS Contemporary for Sony E, rather than mixing in Sony A-mount or Sigma DSLR variants. Compare the hood, caps and any Sigma tripod-support accessories that are actually included.
The lowest eligible merchant offer shown below is not a condition-adjusted bargain score. A much cheaper copy may have worse cosmetic condition or missing accessories. Check final shipping, seller return terms and the exact listing before purchasing; stock and tracked prices can change independently of this editorial comparison.
Before you pay
Used-lens inspection checklist
- Verify Sony FE SEL70300G versus Sigma 100–400mm DG DN OS Contemporary Sony E mount.
- Test zoom movement, glass clarity, stabilization, AF and mount contacts.
- Check included hood, caps, cases and any optional support accessories.
- Compare grades, delivered prices, return policies and which focal-length range actually matches your subjects.
The exact model, optical condition, accessories, grade, warranty and seller return terms matter more than a small headline price difference. Read our complete used-lens buying guide.
Sources, methodology and verification
Mirrorless Lens World Editorial Desk reviewed this comparison on October 14, 2026, using the manufacturer documentation below and the site's native product-family catalog. Retailer data is refreshed separately. No original bench measurements or personal handling tests are claimed.
- Sony SEL70300G manufacturer specifications ↗
- Sigma 100–400mm DG DN OS Contemporary manufacturer specifications ↗
See our editorial policy and affiliate disclosure.
Frequently asked buying questions
Is Sigma's 400mm always a better wildlife choice?
Not always. It frames distant subjects more tightly, but Sony is lighter and starts at a wider 70mm. Your subject distances and shooting conditions determine whether extra reach matters.
Does Sony FE 70–300mm cover full frame?
Yes. Sony specifies the FE 70–300mm SEL70300G for full-frame Sony E mount, while compatible APS-C bodies record a narrower angle of view.
Which is better for close-up details?
Sony specifies a 0.31× maximum magnification with a 0.9m minimum focus distance. Sigma specifies up to 1:4.1 magnification. Neither replaces a dedicated macro lens.