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2. Tamron 28-300mm F/3.5-6.3 Di VC PZD - Wikipedia

   en.wikipedia.org/wiki/Tamron_28-300mm_F/3.5-6.3...

   The Tamron 28-300mm F/3.5-6.3 Di VC PZD (Model A010) is an interchangeable superzoom full-frame DSLR camera lens announced by Tamron on February 6, 2014 [7] and released in late June 2014 for the Canon and Nikon mounts and on 30 October 2014 for the Sony mount. [4]

3. Lenses for SLR and DSLR cameras - Wikipedia

   en.wikipedia.org/wiki/Lenses_for_SLR_and_DSLR...

   A "slow" lens (one that is not capable of passing a lot of light through) might have a maximum aperture from 5.6 to 11, while a "fast" lens (one that can pass more light through) might have a maximum aperture from 1 to 4. Fast lenses are, by definition, larger than slow lenses (for comparable focal length), and typically cost more. [2]

4. Category:Tamron lenses - Wikipedia

   en.wikipedia.org/wiki/Category:Tamron_lenses

   Tamron 18-270mm F/3.5-6.3 Di II VC PZD; Tamron SP AF 28-75mm f/2.8 XR Di LD Aspherical IF Macro; Tamron 28-300mm F/3.5-6.3 Di VC PZD; Tamron SP 35mm F1.8 Di VC USD; Tamron SP 45mm f/1.8 Di VC USD; Tamron SP AF 60mm F/2 Di II LD IF Macro; Tamron SP 70-200mm F/2.8 Di VC USD; Tamron SP AF 90mm f/2.8 Di 1:1 Macro; Tamron 150-600mm lens

5. List of standard zoom lenses - Wikipedia

   en.wikipedia.org/wiki/List_of_standard_zoom_lenses

   There is no precise definition of the term, but lenses marketed as "standard zoom" usually cover a range of at least 30mm to 70mm in terms of 35mm equivalent focal length with an optical zoom ratio of 2.5× (e.g. 28-70mm) to 5× (e.g. 24-120mm) — the most common being 3× (e.g. 24-70mm). [1]

6. List of third-party Sony E-mount lenses - Wikipedia

   en.wikipedia.org/wiki/List_of_third-party_Sony_E...

   Sony α7R III with Sigma 24-70 f/2.8 Art lens. Zoom lenses. Brand Ref. ... Tamron: A063: 28-75mm F/2.8 Di III VXD G2 ... Tamron: A067: 50-400mm F/4.5-6.3 Di III ...

7. 35 mm equivalent focal length - Wikipedia

   en.wikipedia.org/wiki/35_mm_equivalent_focal_length

   35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...