Astrori 28mm f/13 Announced

Astrori 28mm f/13: Amazon

Founded in 2018, AstrHori focuses on the R&D, production and sales of interchangeable lenses, creating incredible optical products with superior optical design, high-quality materials and Shenzhen’s excellent manufacturing base.

The AstrHori full-frame 28mmF13 professional macro lens has an aperture range of F13-F40, an optical structure of 21 elements in 16 groups, a length of about 452mm, and a maximum width of about 23mm at the bayonet. The front of the lens has a built-in LED fill light with ten-level brightness adjustment. The lighting power interface is a Type-c interface. The front glass of the lens is made of sapphire material, which is wear-resistant, anti-collision and high-strength, which can effectively increase the service life. The waterproof and dustproof length of the front of the lens is about 25cm. The lens is divided into two parts, which are detachable, easy to carry, and can play a protective role. The first half can be imaged independently, but the picture quality is not very good. The aperture ring and focus ring use a movie focusing gear, which is convenient for the follow focus. Focusing range: 0.481m~∞ 2x zoom macro mount: Sony E mount, Fuji XF mount, Nikon Z mount, Leica/Panasonic/Sigma L mount, Canon RF mount, Nikon F mount (DSLR) , Canon EF mount (DSLR), Cine PL mount

Product selling point: [Small space shooting]: Due to the special structure of the front section, it can solve the purpose of shooting in a small space. Wide-angle macro with large depth of field, including more subjects. The slender structure of the mirror body can be used for shooting in small spaces such as macro model building, food scenery, animal caves, etc. It can also maintain a certain working distance from the subject, creating a more shocking picture without affecting the subject.

【2x magnification macro】: 2x magnification allows photographers to show more details in content shooting. It provides a greater depth of field than other macro lenses, making it easier for photographers to bring out macro details and backgrounds with a wide-angle view.
【Excellent Portability】: The lens can be separated into 2 parts and stored separately. Portability for photographers on the go.

[Front-end waterproof design] The front 25cm of the lens is waterproofed, and the sapphire glass is brittle and scratch-resistant, so that the lens can go deep into the water (250mm) for shooting to meet the needs of some special environments.
[There is a high-power fill light in front of the camera] Enter animal caves, pipes, narrow and long gaps, outdoor dark light, small internal objects, and product details. In order to meet the daily shooting, the lamp uses 5v voltage, 1 amp current. Power is 5w
[Waterproof protective lens is made of sapphire material] The waterproof protective lens in front of the lens is made of sapphire material, (the main component of the sapphire lens is aluminum oxide, and impurities such as iron oxide and titanium oxide are removed.) High hardness, wear-resistant, not easy to scratch. Increase the service life of the product and the application scenarios during use.

Posted in 3rd Party Lens| Tagged , | 1 Comment

More Tokina SZ Lenses Are Coming Soon


Tokina has some additional telephoto mirror lenses coming soon on IndieGoGo.

Tokina SZ 300mm PRO Reflex F7.1 MF CF

  • Body size: maximum diameter Φ61mm x total length 74.5mm
  • Supported formats: APS-C
  • Lens construction: 8 elements in 8 groups
  • Filter size: Φ46mm
  • Minimum Focus Distance: 0.92m
  • Maximum magnification: 1/2.5
  • Focusing method: Manual focus (front lens extension method)
  • Weight: about 235g
  • Hood: MH-461

Tokina SZ 600mm PRO Reflex F8 MF CF

  • Body size: maximum diameter Φ88.6mm x total length 125mm
  • Supported formats: APS-C
  • Lens construction: 8 elements in 8 groups
  • Filter size: Φ77mm
  • Minimum Focus Distance: 1.77m
  • Maximum magnification: 1/2.5
  • Focusing method: Manual focus (front lens extension method)
  • Weight: about 545g
  • Hood: MH-775

Tokina SZ 900mm PRO Reflex F11 MF CF

  • Body size: maximum diameter Φ96.1mm x total length 168mm
  • Supported formats: APS-C
  • Lens construction: 7 elements in 7 groups
  • Filter size: Φ86mm
  • Minimum Focus Distance: 2.61m
  • Maximum magnification: 1/2.5
  • Focusing method: Manual focus (front lens extension method)
  • Weight: about 725g
  • Hood: MH-861

Tokina SZ 8mm f/2.8 X FISH-EYE: B&H Photo / Amazon
Tokina SZ 33mm f/1.2:
 B&H Photo / Adorama
Tokina SZX 400mm f/8: B&H Photo / Amazon
Tokina SZ 500mm f/8: B&H Photo / Amazon


via Photorumors

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Size Comparson Sony a7RV vs a7RIV – Sony Cameras Are Getting Bigger


Apotelyt posted its side comparison, and as you can see, the Sony a7RV has grown over its predecessor. You can view the full comparison here, and you can find launch coverage here.

Sony a7RV: B&H Photo / Amazon / Adorama

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Sony a7RV Preorders Began


Sony a7RV: B&H Photo / Amazon / Adorama

The Sony a7RV can now be preordered everywhere. You can view the launch coverage here.

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Tamron 30mm f/1.4, 40mm f/1.4, and 50mm f/1.4 Patents Found


Overview

  • [Publication number] P2022162600
  • [Release date] 2022-10-25
  • [Title of Invention] Optical system and imaging device
  • [Application date] 2021-04-13
  • [Applicant]
    [Identification number] 000133227
    [Name] Tamron Co. , Ltd.
  • An optical system and an imaging apparatus are provided that are bright and large-aperture lenses with a small F-number and that suppress image plane fluctuations and chromatic aberrations when the focus fluctuates.
  • 2. Description of the Related Art
    In recent years, as the demand for full-size mirrorless cameras has increased, there has been a demand for lenses capable of handling high resolutions as the number of pixels in sensors increases and the resolution of monitors increases.
  • [0006]
    However, in the optical system described in Patent Document 1, the power distribution of the first lens group and the second lens group is not appropriate, so the diameter of the lenses constituting the first lens group is relatively large. As a result, the entire product becomes large. In addition, correction of image plane fluctuation and chromatic aberration during focusing is insufficient, and an improvement in optical performance is required.
  • [0007] In
    the optical system described in Patent Document 2, since the single lens group is used for focusing, the image plane fluctuates greatly when focusing from infinity to the closest object. Therefore, it is required to suppress the fluctuation of the image plane over the entire focusing range.
  • [0008]
    The optical system described in Patent Document 3 performs focusing by a floating focus method. Glass with low anomalous dispersion is used for the lens used in the lens group that moves during focusing. As a result, axial chromatic aberration and chromatic aberration of magnification are insufficiently corrected over the entire focusing range, and color fringing on the imaging plane becomes conspicuous.
  • SUMMARY OF THE INVENTION
    It is an object of the present invention to provide an optical system and an image pickup apparatus in which fluctuations in the image plane and chromatic aberration are suppressed in the entire in-focus range while using a bright, large-aperture lens with a small F-number.

Example 1

  • Focal length: 33.3896
  • F-value: 1.4500
  • Half angle of view: 32.8185
  • Image height: 21.633
  • Back focus: 17.500

Example 2

  • Focal Length: 40.3989
  • F-value: 1.4100
  • Half angle of view: 27.8608
  • Image height: 21.633
  • Back focus: 17.487

Example 3

  • Focal length: 48.5017
  • F-value: 1.4399
  • Half angle of view: 23.7670
  • Image height: 21.633
  • Back focus: 18.1462

Example 4

  • Focal length: 45.5424
  • F-value: 1.4500
  • Half angle of view: 25.1291
  • Image height: 21.633
  • Back focus: 17.5015

Example 5

  • Focal length: 31.4732
  • F-value: 1.4601
  • Half angle of view: 34.5150
  • Image height: 21.633
  • Back focus: 17.5000

via asobinet

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Sony a7RV Launch Coverage


Sony a7RV: B&H Photo / Amazon

 

The Sony a7RV Launch event is about to start so follow the event above.

Key Features
  • 61MP Full-Frame Exmor R BSI CMOS Sensor
  • BIONZ XR & AI Processing Unit
  • AI-Based Real-Time Tracking AF System
  • 8K 24p, 4K 60p, FHD 120p 10-Bit Video
  • 4K 16-Bit Raw Output; S-Log3/S-Cinetone
  • 9.44m-Dot EVF with 120 fps Refresh Rate
  • 3.2″ 4-Axis Multi-Angle Touchscreen LCD
  • 10 fps Shooting with AF/AE Tracking
  • 8-Stop 5-Axis Image Stabilization
  • Dual CFexpress Type A/SD Card Slots

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