Recently，Canon applied for a high-magnification zoom bc game promo code design patent，Includes "60-600mm F4.5-8”、“70-700mm F4.7-8" and "80-800mm F5-9" examples。
Applicant: Canon Inc.
Public number: P2022053697
Application number: P 2020160477
Public date: 2022-04-06
Content of invention: zoom bc game promo code and image pickup device and image pickup system having the bc game promo code。
Problems to be solved: Provide a high-magnification telephoto zoom bc game promo code，and good optical performance throughout the zoom range。
Since mirrorless cameras do not require space for installing quick-return mirrors，So there is no need to ensure the back focus like traditional lenses。Therefore，Different from previous lenses，Increased freedom in bc game promo code structure design，Ability to design small and lightweight lenses。
Especially the back focal length of telephoto lenses tends to become longer，But by making the back focal length shorter at the wide-angle end of the telephoto zoom bc game promo code，Enabling bc game promo code miniaturization for mirrorless cameras.
Example 1 (60-600mm F4.5-8)
bc game promo code ratio: 9.51
Focal bc game promo code: 61.50 164.60 585.00
F value: 4.46 5.94 8.16
Half viewing angle (°): 19.38 7.49 2.12
Full bc game promo code length: 258.90 302.70 346.50
Back focus: 30.00 49.79
Example 3 (70-700mm F4.7-8)
bc game promo code ratio: 9.74
Focal bc game promo code: 70.00 185.35 682.00
F value: 4.76 6.20 8.16
Half viewing angle (°): 17.18 6.66 1.82
Total bc game promo code length: 271.00 316.00 361.05.40
Back focal bc game promo code: 31.22 97.50
Example 4 (80-800mm F5-9)
Focal bc game promo code: 81.60 211.55 784.00
F value: 5.23 6.70 9.18
Half viewing angle (°): 14.85 5.84 1.58
Image height: 21.64 21.64 21.64
Total bc game promo code length:274.33 322.67 371.01
Back focus: 32.48 51.83 105.97
It seems，Canon may be considering launching a super telephoto high-magnification zoom bc game promo code like the Sigma 60-600mm。Excluding flange distance of RF mount，Total length is approximately 23.9cm to 25.4cm，It gives the impression that its specifications are very compact。
A telephoto zoom bc game promo code can be made considerably smaller by shortening the back focal length at the wide-angle end，But if it is a short back focus design，The bc game promo code position is too far back，You cannot use teleconverters，This is such a shame。
This website and its official account are public welfare network platforms，The pictures and texts posted are for dissemination of information only、Introduction to knowledge、For explaining the problem；Related copyrights belong to the original author，Please be sure to indicate the source and author when reprinting。
Once the manuscript is selected，It is deemed that the author agrees to use this website for free in various non-profit publications that have a cooperative relationship with this website、Internet and mobile media and professional academic libraries, etc.。
The author shall be responsible for any copyright issues and legal responsibilities arising from the manuscript。
Learn more updates，Please scan the QR code，Follow our WeChat official account:
