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  2. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

  3. Canon EF-M 28mm Macro lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF-M_28mm_Macro_lens

    The maximum magnification of this Macro lens is 1× in Normal mode and 1.2× in Super Macro mode. It is the first Canon lens with integrated macro light and uses the Hybrid IS. Technical information. The Canon EF-M 28mm f/3.5 Macro IS STM the first wide angle Macro lens in the Canon lineup.

  4. Canon EF-S 60mm f/2.8 Macro USM lens - Wikipedia

    en.wikipedia.org/.../2.8_Macro_USM_lens

    Lens-based stabilization No: Macro capable Yes: Unique features: 1:1 macro: Application: Macro/portrait: Physical; Max. length: 69.8 mm: Diameter: 73 mm: Weight: 335 g (0.74 lb) Filter diameter: 52 mm: Accessories; Lens hood: ET-67B: Angle of view; Horizontal: 20° 40' Vertical: 14° 10' Diagonal: 25° 30' History; Introduction: 2005 ...

  5. Worth 4 dot test - Wikipedia

    en.wikipedia.org/wiki/Worth_4_dot_test

    assess degree of binocular vision. The Worth Four Light Test, also known as the Worth's four dot test or W4LT, is a clinical test mainly used for assessing a patient's degree of binocular vision and binocular single vision. Binocular vision involves an image being projected by each eye simultaneously into an area in space and being fused into a ...

  6. Canon EF 180mm f/3.5L Macro USM lens - Wikipedia

    en.wikipedia.org/.../3.5L_Macro_USM_lens

    Lens-based stabilization No: Macro capable Yes: Unique features: 1:1 macro: Application: Macro: Physical; Max. length: 7.4in / 188 mm: Diameter: 3.3in / 84 mm: Weight: 1.09kg / 38.2oz: Filter diameter: 72 mm: Accessories; Lens hood: ET-78: Angle of view; Diagonal: 11° History; Introduction: 1996: Discontinuation: 2021: Retail info; MSRP: $1200 USD

  7. Canon MP-E 65mm f/2.8 1–5x Macro - Wikipedia

    en.wikipedia.org/wiki/Canon_MP-E_65mm_f/2.8_1...

    The MP-E65mm f/2.8 1-5x Macro Photo is a photographic lens that was released in September 1999 and was discontinued in 2023. It was manufactured by Canon for use on the EOS photographic system. It is a manual focus lens for the EF mount and is specifically designed for macro photography.

  8. Canon TS-E 135mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_TS-E_135mm_lens

    Lens-based stabilization No: Macro capable Yes: Unique features: Perspective control, Scheimpflug principle, Macro: Application: Product, Macro, Portrait, Tele: Physical; Max. length: 139.1 mm (5.48 in) Diameter: 88.5 mm (3.48 in) Weight: 1,110 g (39 oz) Filter diameter: 82 mm: Accessories; Lens hood: ET-88: Angle of view; Horizontal: 15º ...

  9. Perspective control - Wikipedia

    en.wikipedia.org/wiki/Perspective_control

    Perspective control is a procedure for composing or editing photographs to better conform with the commonly accepted distortions in constructed perspective. The control would: make all lines that are vertical in reality vertical in the image. This includes columns, vertical edges of walls and lampposts. This is a commonly accepted distortion in ...

  10. Sigma 18–50mm f/2.8 EX DC Macro lens - Wikipedia

    en.wikipedia.org/wiki/Sigma_18–50mm_f/2.8_EX_DC...

    The Sigma 18-50mm f / 2.8 EX DC Macro is a wide to normal angle, zoom lens made by the Sigma Corporation. The lens is produced in Canon EF mount, Four Thirds System, Nikon F-mount, Pentax K mount, the SA mount, and the Sony/Minolta AF Mount varieties, all have the same optical formula. The lens is designed for digital crop DSLR with an APS-C sized

  11. Single-lens reflex camera - Wikipedia

    en.wikipedia.org/wiki/Single-lens_reflex_camera

    A single-lens reflex camera ( SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final ...