Canon’s new 600mm and 800mm lenses

Started 3 months ago | Discussions thread
bclaff Forum Pro • Posts: 10,490
Re: Canon’s new 600mm and 800mm lenses
4

AiryDiscus wrote:

...

No, it doesn't simplify the lens design. My guess is that they use the front element as a stop, much as a telescope, so there is no stop at all (could be wrong). ...

FWIW:

US20190346660A1

(Example 3 is the 780mm lens)

Unfortunately I still haven't taught the Optical Bench to do diffractive elements

-- hide signature --

Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow