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Tamron 20-40mm f/2.8 Di III VXD Lens Compared to the Tamron 17-28mm f/2.8 Di III RXD Lens
| Specifications | Tamron 20-40mm f/2.8 Di III VXD Lens | Tamron 17-28mm f/2.8 Di III RXD Lens |
|---|---|---|
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| Year Introduced | 2022 | 2019 |
| Mounts On | Full-Frame, APS-C | Full-Frame |
| Lenses / Groups | 12/11 | 13/11 |
| Angle of View: Diagonal | 94°30'- 56°49' | 103° 41' - 75° 23' |
| 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 | 12.9 oz (365g) | 14.8 oz (420g) |
| Actual Weight | 12.9 oz (364.5g) | 14.6 oz (415g) |
| Lens Hood Weight | 0.8 oz (23.3g) | 0.7 oz (20g) |
| In-Use Weight | 13.7 oz (387.8g) | 15.4 oz (435g) |
| Size | ||
| Manufacturer Spec Size (DxL) | 2.93 x 3.41” (74.4 x 86.5mm) | 2.87 x 3.9” (73 x 99mm) |
| Measured Size (DxL) | 2.93 x 3.61” (74 x 91.7mm) | 2.88 x 4.1” (73.1 x 104.1mm) |
| Max Length at Full Extension | 3.98” (101mm) | 4.1” (104.1mm) |
| Internal Zoom? / Extends with Zoom? | N / Y | Y / N |
| Zoom Extension Length | 0.37” (9.3mm) | |
| Internal Focusing? / Extends with Focusing? | Y / N | Y / N |
| Lens Hood Size (DxL) | 3.42 x 1.32” (86.8 x 33.6mm) | 3.42 x 1.27” (86.8 x 32.3mm) |
| Lens Length with Hood (Min-Max) | 4.63 - 4.95” (117.5 - 125.8mm) | 5.07 - 5.07” (128.9 - 128.9mm) |
| Size of Rings: Focus / Zoom | 0.87” / 0.46” (22.2mm / 11.6mm) | 0.54” / 1.42” (13.7mm / 36mm) |
| Filter Size | 67mm UV ► CP ► | 67mm UV ► CP ► |
| Front Element (Filter Mount) Rotates | N | N |
| Focus | ||
| AF Motor Type | VXD Linear | RXD Stepping |
| Full Time Manual Focus | Y | Y |
| Focus Ring Rotation | 165° | 240 ° |
| Focus Limiter? / Focus Limiter Ranges | N | N |
| Distance Scale? / Type | N | N |
| Close Focus | ||
| Spec Min Focus Distance (Wide / Long) | 6.69” / 11.42” (170mm / 290mm) | 7.48” / 10.24” (190mm / 260mm) |
| Tested Min Focus Distance (Wide / Long) | 6.46” / 10.71” (164mm / 272mm) | 6.85” / 8.7” (174mm / 221mm) |
| Maximum Magnification | 0.26x | 0.19x |
| Features | ||
| Zoom Ring Rotation | 65° | 65 ° |
| Tripod Ring Included? / Removable? | N | N |
| Zoom Ring Lock Switch? | N | |
| Lens Hood Included / Model? | Y / HA062 Buy ► | Y / HA046 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 | 20mm = 2.56' 24mm = 2.86' 28mm = 3.36' 35mm = 4.25' 40mm = 4.68' |
17mm = 2.16' 20mm = 2.5' 24mm = 3.0' 28mm = 3.37' |
| 1200mm x 800mm Subject Framing Distance | 20mm = 749mm 24mm = 872mm 28mm = 1024mm 35mm = 1294mm 40mm = 1427mm |
17mm = 658mm 20mm = 761mm 24mm = 916mm 28mm = 1027mm |
| Review | Tamron 20-40mm f/2.8 Di III VXD Lens | Tamron 17-28mm f/2.8 Di III RXD Lens |
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Recommended Retailers
- B&H Photo(strongly recommended)
- Adorama
- Amazon.com
Wex Photographic
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