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Sigma 28-70mm F2.8 DG DN Contemporary Lens Compared to the Tamron 28-75mm f/2.8 Di III RXD Lens
| Specifications | Sigma 28-70mm F2.8 DG DN Contemporary Lens | Tamron 28-75mm f/2.8 Di III RXD Lens |
|---|---|---|
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| Year Introduced | 2021 | 2018 |
| Mounts On | Full-Frame, APS-C | Full-Frame, APS-C |
| Lenses / Groups | 16/12 | 15/12 |
| Angle of View: Diagonal | 75.4° – 34.3° | 75° 23' - 32° 11' |
| Aperture | ||
| Aperture Range - Wide / Long | f/2.8-22 | f/2.8-22 |
| Number of Aperture Blades | 9 | 9 |
| Rounded Aperture? | Y | Y |
| Weight | ||
| Manufacturer Specification Weight | 16.6 oz (470g) | 19.4 oz (550g) |
| Actual Weight | 16.8 oz (475.7g) | 19.1 oz (540g) |
| Lens Hood Weight | 0.9 oz (25.9g) | 0.9 oz (25g) |
| In-Use Weight | 17.7 oz (501.6g) | 19.9 oz (565g) |
| Size | ||
| Manufacturer Spec Size (DxL) | 2.84 x 4” (72.2 x 101.5mm) | 2.87 x 4.64” (73 x 117.8mm) |
| Measured Size (DxL) | 2.8 x 4.28” (71 x 108.8mm) | 2.87 x 4.84” (72.8 x 123mm) |
| Max Length at Full Extension | 5.18” (131.6mm) | 5.82” (147.9mm) |
| Internal Zoom? / Extends with Zoom? | N / Y | N / Y |
| Zoom Extension Length | 0.9” (22.8mm) | 0.98” (24.9mm) |
| Internal Focusing? / Extends with Focusing? | Y / N | Y / N |
| Lens Hood Size (DxL) | 3.38 x 1.5” (85.8 x 38.1mm) | 3.41 x 1.43” (86.7 x 36.4mm) |
| Lens Length with Hood (Min-Max) | 5.53 - 6.43” (140.5 - 163.3mm) | 5.99 - 6.97” (152.1 - 177mm) |
| Size of Rings: Focus / Zoom | 0.74” / 1.11” (18.9mm / 28.2mm) | 0.57” / 1.46” (14.6mm / 37.2mm) |
| Filter Size | 67mm UV ► CP ► | 67mm UV ► CP ► |
| Front Element (Filter Mount) Rotates | N | N |
| Focus | ||
| AF Motor Type | Stepping Motor | RXD Stepping |
| Full Time Manual Focus | Y | Y |
| Focus Ring Rotation | 330° | 1440° |
| Focus Limiter? / Focus Limiter Ranges | N | N |
| Distance Scale? / Type | N | N |
| Close Focus | ||
| Spec Min Focus Distance (Wide / Long) | 7.48” / 14.96” (190mm / 380mm) | 7.48” / 15.35” (190mm / 390mm) |
| Tested Min Focus Distance (Wide / Long) | 7.24” / 15.12” (184mm / 384mm) | |
| Maximum Magnification | 0.22x | 0.34x |
| Features | ||
| Zoom Ring Rotation | 60° | |
| Tripod Ring Included? / Removable? | N | N |
| Zoom Ring Lock Switch? | N | |
| Lens Hood Included / Model? | Y / LH706-01 Buy ► | Y / HA036 Buy ► |
| Weather Sealed? / Filter Required? | Y / | Y / |
| Image Stabilization? / Stops? / Tripod Sensing? | N | N |
| Extender Compatible? | N | N |
| Case Included? / Type? | N / | N / |
| 47.25" x 31.5" Subject Framing Distance | 28mm = 3.24' 35mm = 4.06' 50mm = 5.92' 70mm = 7.92' |
28mm = 3.39' 35mm = 4.12' 50mm = 5.95' 75mm = 8.49' |
| 1200mm x 800mm Subject Framing Distance | 28mm = 989mm 35mm = 1236mm 50mm = 1803mm 70mm = 2414mm |
28mm = 1032mm 35mm = 1255mm 50mm = 1813mm 70mm = 2588mm |
| Review | Sigma 28-70mm F2.8 DG DN Contemporary Lens | Tamron 28-75mm f/2.8 Di III RXD Lens |
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