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Maddox wing. The Maddox Wing is an instrument utilized by ophthalmologists, orthoptists and optometrists in the measurement of strabismus (misalignment of the eyes; commonly referred to as a squint or lazy eye by the lay person). It is a quantitative and subjective method of measuring the size of a strabismic deviation by dissociation of the ...
Esophoria is an eye condition involving inward deviation of the eye, usually due to extra-ocular muscle imbalance. It is a type of heterophoria. Cause. Causes include: Refractive errors; Divergence insufficiency; Convergence excess; this can be due to nerve, muscle, congenital or mechanical anomalies.
Macro photograph of a common yellow dung fly ( Scathophaga stercoraria) made using a lens at its maximum 1:1 reproduction ratio, and an 18×24mm image sensor, the on-screen display of the photograph results in a greater than life-size image. Headshot of a dragonfly taken with a 100 mm macro lens coupled with a 50 mm lens in reverse at the end.
18-50mm f / 2.8 EX DC Macro; Maker: Sigma Corporation: Technical data; Focal length: 18-50mm: Aperture (max/min) f / 2.8 – f / 22: Close focus distance: 28cm/11 in. Max. magnification: 1:3: Diaphragm blades: 7: Construction: 15 elements in 13 groups: Features; Short back focus No: Lens-based stabilization No: Macro capable Yes: Application ...
Incomitant strabismus cannot be fully corrected by prism glasses, because the eyes would require different degrees of prismatic correction dependent on the direction of the gaze. Incomitant strabismus of the eso- or exo-type are classified as "alphabet patterns": they are denoted as A- or V- or more rarely λ -, Y- or X-pattern depending on the ...
DxO ViewPoint is image geometry and lens defect correction software developed by DxO. It is designed to automatically straighten distorted perspectives caused by the lens used and the position of the photographer.
Tilt-lens photo of a model train. Note how the focus plane is along the train, and how the blurring of the background proceeds from left to right. Tilt–shift photography is the use of camera movements that change the orientation or position of the lens with respect to the film or image sensor on cameras .
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Zoom: Focal length: 70–300mm: Aperture (max/min) f/4 – f/5.6: Close focus distance: 150cm / (95cm Macro mode) Max. magnification: 1:4.1 / 1:2(Macro mode) Diaphragm blades: 9: Construction: 14 elements in 10 groups: Features; Short back focus No: Ultrasonic motor No: Lens-based stabilization No: Macro capable Yes: Application: Consumer ...
Image stabilization (IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure.. Generally, it compensates for pan and tilt (angular movement, equivalent to yaw and pitch) of the imaging device, though electronic image stabilization can also compensate for rotation about the optical axis ().