Follow us:
The Canon EF 200-400mm F4L IS USM ×1.4 might be on its way to be discontinued, Asians sources suggest.
The Canon EF 200-400mm F4L IS USM ×1.4 might get replaced by the RF 100-500mm f/4 IS, some sources claim. The RF 100-500mm might get announced in Q4 2023, but I wouldn’t bet on it.
The EF 200-400mm F4L IS USM ×1.4 is not that old for this class of lenses, it was released in 2013.
[via asobinet]
Here is a new Canon patent application, yet for another RF mount lens. A rather interesting one, although it refers to ab already released lens: the Canon RF 100-300mm f/2.8L IS USM.
Canon patent application 2023117937 (Japan, published 8/24/2023) discusses optical formulas for a fast telephoto zoom lens, a telephoto zoom that keeps f/2.8 over the zoom range.
Excerpt from the patent literature:
A zoom lens, an imaging device having the same, and an imaging system.
An object of the present invention is to provide a lightweight zoom lens that has high optical performance over the entire zoom range and all object distances.
Description of the Related Art
In recent years, zoom lenses used in image pickup apparatuses are required to have high optical performance at all object distances from infinity to the shortest distance, and to be quiet during focusing. In order to meet these demands, a zoom lens has been proposed that performs focusing by moving two lens groups along different trajectories (see Patent Documents 1 and 2).
In a large-aperture telephoto zoom lens with a long focal length and a small F-number, if the focus group is arranged near the diaphragm or closer to the object side than the diaphragm, the lens diameter of the focus group increases, making it difficult to reduce the weight . As a result, the load on the actuator for driving the focus group increases, making it difficult to perform quiet and high-speed focusing. In order to reduce the weight of the focus group, it is important to appropriately set the arrangement of the focus group and the refractive power of the front and rear lens groups.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a lightweight zoom lens that has high optical performance over the entire zoom range and object distance.
Example 1
Example 2
As I said at the beginning, the Canon patent application refers to an already released lens. More Canon patent applications are listed here.
[via asobinet]
Here is a new Canon patent application. I rather interesting one.
Canon patent application 2023118490 (Japan, published 8.25.2023) discusses methods and technology for a built-in teleconverter with a smaller form factor, i.e. the miniaturization of the teleconverter.
From the patent literature:
A large space is required for inserting or retracting a conversion lens inside an optical device, making it difficult to miniaturize the optical device.
Description of the Related Art
In optical equipment such as digital cameras, video cameras, and interchangeable lenses, it is known that the focal length range can be changed by inserting a conversion lens into the optical path.
Patent Document 1 discloses a technique for moving a conversion lens built into a camera body between an insertion position inserted into an optical path and a retracted position retracted out of the optical path. The built-in conversion lens described here is retracted in the space between the prism that guides the subject image to the finder and the strobe that is stored above the lens barrel.
However, the built-in conversion lens described in Patent Document 1 is moved to the retracted position using a dedicated actuator. Therefore, a space for arranging the actuator inside the lens is required, and it is difficult to suppress the enlargement of the lens.
Accordingly, the present invention provides an optical apparatus that has a built-in conversion lens so that a space for inserting or withdrawing the built-in conversion lens can be secured while suppressing an increase in the size of the lens. for the purpose.
More Canon patents are listed here.
[via asobinet]
Another new Canon lens rumor by the usual suspects. Canon is now said to release 8-10 new RF/RF-S lenses before March 2024.
Absolutely no information about what lenses to expect. Says the source:
We expect at least 2 lenses to be announced later this month and possibly a second lens announcement later in 2023. We haven’t yet confirmed which lenses will be announced and when. Sources made it seem like there are a lot just waiting to be announced. We won’t pretend to fully understand the how’s, why’s and when’s of product announcements.
February 2024 is also the annual CP+ show in Yokohama, Japan, and Canon loves to show off new goodies on their home turf, a show we also expect Canon to show off a couple of new higher-end cameras.
We have been told to expect between 8-10 new RF/RF-S lenses between now and March of 2024.
It is clear to anyone who watches the industry that Canon will release a lot of new RF/RF-S lenses. They also said it in various interviews. So, not a real rumor, despite being sold as such.
Stay tuned.
Source: Canon Rumors
It seems that Chinese manufacturer Meike is going to release the first RF mount lens with Canon-licensed AF implementation, the Meike AF 85mm F1.4.
The is said to get released to the public in August 2023, after the 30th Beijing International Radio, Film and Television Exhibition (BIRTV) on August 23-26, 2023. These are the specifications:
In a recent interview, Canon execs indeed said they will open the RF mount to third party manufacturers.
[via asobinet]
Nikon is set to release a retro-looking full-frame mirrorless camera. Here are some leaked images.
The upcoming Nikon Zf looks rather similar to the Nikon Zfc. Some specifications leaked too:
[via asobinet]
Notice
This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the cookie policy.
By closing this banner you agree to the use of cookies.