Today Only: Vello Auto Extension Tubes for Canon Lenses (RF, EF) – $49.95 (reg. $79.95)

Vello Auto Extension Tubes

Only for today (12/5/2022) B&H Photo has a $30 discount on the Vello Auto Extension Tubes for Canon RF-Mount Lenses, for RF and EF mount lenses.

At a glance:

  • Shortens Minimum Focus Distance of Lens
  • Provides Macro Capability
  • Maintains Autofocus & Auto-Exposure
  • Durable Metal Mounts
  • For Canon RF-Mount Lenses
  • Includes 12 and 20mm Tubes
  • Use Tubes Individually or Combined
  • Lightweight and Durable Design
  • No Optical Elements

Get the Vello Auto Extension Tubes for Canon lenses at $49.95:

More selected deals:

Click here to open the rest of the article

Today Only: IRIX 15mm f/2.4 Blackstone Lens (Canon EF) – $419 (reg. $599)

IRIX 15mm F/2.4

Only for today (12/5/2022) B&H Photo has a $180 discount on the IRIX 15mm f/2.4 Blackstone Lens for Canon EF mount.

At a glance:

  • Canon EF-Mount/Full-Frame Format
  • Aperture Range: f/2.4 to f/22
  • Two Aspherical Elements
  • Two ED and Three HR Elements
  • Neutrino Coating
  • Manual Focus Design with Focus Lock
  • UV Fluorescent Engraved Markings
  • Depth of Field and Focus Distance Scales
  • Weather-Sealed Magnesium Alloy Housing
  • Rounded Nine-Blade Diaphragm

Get the IRIX 15mm f/2.4 Blackstone Lens for Canon EF mount on sale at $419. Compare at $599.

More selected deals:

Click here to open the rest of the article

AstrHori 18mm F8 Shift Lens Might Get Released Soon (RF Mount)

AstrHori 18mm

Another third party lens for the RF mount might soon get announced, the AstrHori 18mm F8 Shift lens.

At a glance:

  • Lens construction: 9 elements in 9 groups
  • Angle of view: 99.2 degrees
  • Shift amount: ±6mm
  • Shortest shooting distance: 0.34m
  • Filter size: 58mm
  • Size: 62x36mm
  • Weight: 164g
  • Mount: Canon RF/Leica L mount

Chinese manufacturer Astrhori is said to soon release another RF mount lens, the AstrHori 18mm F8. Other Astrhori lenses are rumored to get announced.

[via asobinet]

TTArtisan 11mm F2.8 Fisheye Lens Announced (Canon RF)

A new lens for the RF mount, the TTArtisan 11mm F2.8 Fisheye

At a glance:

  • RF-Mount Lens/Full-Frame Format
  • Aperture Range: f/2.8 to f/16
  • Fisheye Optical Design
  • Manual Focus Operation
  • Minimum Focusing Distance: 6.7″
  • 7-Blade Diaphragm
  • Built-In Lens Hood

The lens is available at $215 at B&H Photo and Adorama and Amazon.

TTArtisan 11mm f/2.8 Overview

Offering a uniquely wide angle of view, the TTArtisan 11mm f/2.8 is a fisheye lens designed for Canon RF-mount mirrorless cameras. The expansive field of view and distinct fisheye look is characterized by immense depth of field along with strong distortion for creating very striking and dynamic imagery. The wide-angle design is also complemented by a bright f/2.8 maximum aperture, to suit working in available lighting conditions, and the lens’s manual focus design permits working with subjects as close as 6.7″ away.

Ultra-wide prime is designed for full-frame Canon RF-mount mirrorless cameras.

Fisheye design renders an immensely wide angle of view to produce distinct visual appeal characterized by dramatic distortion and a creative depiction of space.

Manual focus design permits smooth, refined control along with a minimum focusing distance of 6.7″.

Built-in petal-shaped lens hood that helps to block stray light from causing lens flare and also offers some physical protection to the front of the lens.

Canon Patent: RF 70-300mm f/4.5-7.2 & RF 250-600mm f/6.3-11

Canon Patent

A new Canon patent, and once more more for RF mount lenses (what else?).

Canon patent application 2022178447 (Japan, published 12/2/2022) discusses optical formulas for two zoom lenses for the RF mount:

  • RF 70-300mm f/4.5-7.2
  • RF 250-600mm f/6.3-11

From the patent literature:

A compact and lightweight zoom lens that has high optical performance over the entire zoom range is provided.

Description of the Related Art

In recent years, zoom lenses used in image pickup apparatuses are required to have high optical performance and to be compact and lightweight.

As a zoom lens that meets these requirements, Patent Document 1 discloses a zoom lens having first to fourth lens groups with positive, negative, positive, and positive refractive powers arranged in order from the object side to the image side, A zoom lens is disclosed in which the spacing between adjacent lens groups changes during zooming.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a compact and lightweight zoom lens that has high optical performance over the entire zoom range, and an imaging apparatus having the zoom lens.

Example 1

  • Focal length: 103.01-387.98
  • F-value: 6.30-8.24
  • Half angle of view: 11.86-3.19
  • Image height: 21.64
  • Total length: 183.99-280.00
  • Back focus: 32.00-122.21

Example 2

  • Focal length: 103.01-347.20
  • F-value: 5.13-8.24
  • Half angle of view: 11.86-3.57
  • Image height: 21.64
  • Overall length: 198.72-267.94
  • Back focus: 32.86-136.99

Example 3

  • Focal length: 70.00-300.00
  • F-value: 4.40-7.20
  • Half angle of view: 17.17-4.12
  • Image height: 21.64
  • Total length: 165.01-231.87
  • Back focus: 27.80-102.92

Example 4

  • Focal length: 250.00-600.00
  • F-value: 6.24-11.33
  • Half angle of view: 4.95-2.07
  • Image height: 21.64
  • Overall length: 305.44-336.20
  • Back focus: 29.45-163.77

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

[via asobinet]