Canon Patent To Reduce Ghosting And Flaring (14mm f/2.8)

14mm f/2.8

Once more great Japanese site Egami (translated) spotted an important Canon patent. It is about the reduction of ghosting through anti-reflective coating on both sides of the lens, the coating consisting of fine uneven structures. Ghosting happens for instance when you point your lens at a bright light source, like the sun, and are the result of an acute angle of light bouncing (reflecting) between the individual glass elements of the lens. The technology is filed using a 14mm f/2.8 lens as engineering example. Should work well on other wide angle lenses too.

Surface coating
  • Patent Publication No. 2012-159720
    • 2012.8.23 Release Date
    • 2011.2.1 filing date
  • Example 1
    • F = 14.3mm focal length
    • Fno. = 2.89
    • Half angle of view ω = 56.5deg.
    • 14 images in 10 groups lens configuration
    • 1 UD glass sheet
  • Canon patent
    • Suppress the occurrence of the ghost
    • Having two surface anti-reflection surface of fine uneven structure
      • Non-periodic pitch
      • 400nm 300nm pitch less than average
    • Incident light for various interference conditions to cancel the reflected light is maintained
    • The average height of uneven surface with two different
    • 0.001% or less (2) the product of the reflectance of the surface (incident angle 0 degree)
    • 0.1% or less (2) the product of the reflectance of the surface (incident angle 60 degrees)
    • 0.05% more than the absolute value of the difference between the reflectance of the surface (2), (0 ° angle of incidence)
    • 0.2% or more the absolute value of the difference in reflectance of the surface (2), (incident angle 60 degrees)
    • The anti-reflection film of aluminum and aluminum oxide
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A Quick Yet Comprehensive Guide To Rokinon Lenses

Our friends over at The Phoblographer published something really useful: a survey covering all Rokinon lenses for DSLR cameras. Among lenses for other mount types, the following lenses with Canon mount are covered: 8mm Ultra Wide Angle f/3.5 Fisheye Lens, 8mm T/3.8 Fisheye Cine Lens, 14mm Ultra Wide-Angle f/2.8 IF ED UMC Lens, 24mm f/1.4 ED AS UMC Wide-Angle Lens, 35mm f/1.4 Wide-Angle US UMC Aspherical Lens, 85mm f/1.4 Aspherical Lens. Don’t miss the survey!

To see all Rokinon lenses for EF mount on B&H click here, to see all Rokinon lenses on Amazon click here.

Shot using the Rokinon 14mm Ultra Wide-Angle f/2.8 IF ED UMC Lens – Image Credit: Chris Gampat/The Phoblographer

Three New Samyang VDSLR Lenses To Be Released Soon (14mm, 24mm and 35mm)

Video making with a DSLR is having a big momentum. No surprise that Samyang just announced three new VDSRL lenses (with Canon mount). The lenses are  35mm T1.5 AS UMC , 24mm  T1.5 ED AS IF UMC and 14mm T3.1 ED AS IF UMC. The lenses will be released “in sequence”: the 35mm starting next week, the 24mm at the end of August and the 14mm in September. No prices have been communicated so far.

PRESS RELEASE 9th AUGUST 2012

Soon on sales!

SAMYANG T1.5 35mm AS UMC SAMYANG T1.5 24mm ED AS IF UMC SAMYANG T3.1 14mm ED AS IF UMC

Cracow, 9th August 2012 – Samyang Optics gladly informs, that Samyang Family has been enlarged by three new lenses dedicated for digital cinema purpose.

Lenses with focal 35mm, 24 mm and 14mm will be available on sales in sequence next week, at the end of August and in September.

The construction of the new lenses has been based on previous types dedicated for photography. Their main feature are racks co-operating with follow – focus system, and a ring rotated continously. Thanks to these alterations it is possible to precisely and silently operate focus and depth of field. Another facility is putting aperture and focus scale parallel to the axis of the lens and aperture marked with number of transmission T. Lenses are compatible with Nikon and Canon cameras.

Prices will be announced soon.

14mm
24mm
35mm

Samyang Lenses for Canon In Stock at B&H

B&H has four Samyang lenses with Canon mount in stock and ready to ship. These are mechanical things: no AF nor camera controlled aperture, but very good build quality at a decent price. All listed lenses are compatible with the APC-S format. The following lenses are available:


  • Samyang 14mm Ultra Wide-Angle f/2.8 IF ED UMC for $399.00 (click here). Core specs (review):

    • Ultra Wide-Angle 14mm Lens
    • Compatible With Full Frame Cameras
    • Compatible With APS-C Cameras
    • Hybrid Aspherical Lenses — Sharp Images
    • Multi-Layer Coating to Reduce Flare
    • Manual Focus Lens
    • Built-In Petal-Type Lens Hood

 


  • Samyang 85mm f/1.4 Aspherical Lens at $299.00 (click here). Core specifications (review):

    • Telephoto Portrait Lens
    • Designed For Full-Frame Cameras
    • Manual Focus
    • Minimum Focusing Distance of 3.3′
    • Hybrid Aspherical Lense — Sharp Images
    • Multi-Layer Coating to Reduce Flare

     

 


  • Samyang 8mm Ultra Wide Angle f/3.5 Fisheye Lens     at $299.00 (click here). Core specifications (review):

    • Ultra Wide-Angle 8mm Fisheye Lens
    • For APS-C Size Image Formats
    • Hybrid Aspherical Lenses — Sharp Images
    • Multi-Layer Coating to Reduce Flare
    • Minimum Focusing Distance of 12″
    • Built-In Petal-Type Lens Hood

 


  • Samyang 35mm f/1.4 WIDE ANGLE UMC lens at $499.00 (click here). Core specifications (review):

    • 12 elements in 10 groups inc. 1x aspherical & 2 HR elements
    • 8 blades
    • 0.3m min. focus distance
    • 111x83mm
    • 77mm filter size
    • petal-shaped lens hood, bayonet mount