02-25-2022, 05:17 AM
I was looking around the net for the optical formula for the equivalent focal length lens from Nikon ........ ie the AF-S 800mm F5.6 etc ......
I'm guessing from memory that there were two flourite elements at the front of the Nikkor 800mm lens ..... plus possibly a protective meniscus front element .......
........ just to satisfy my idle curiosity as to the weight difference between Canon's and Nikon's designs .....
I can only open these two links by clicking here, but the script is in Japanese .... what are these two lenses ??
https://cweb.canon.jp/eos/rf/lineup/rf40...uction.png
vs
https://cweb.canon.jp/eos/rf/lineup/rf80...uction.png
can anyone post a link for the optical formula of the Nikon's 800mm FL lens??
I'm guessing from memory that there were two flourite elements at the front of the Nikkor 800mm lens ..... plus possibly a protective meniscus front element .......
........ just to satisfy my idle curiosity as to the weight difference between Canon's and Nikon's designs .....
I can only open these two links by clicking here, but the script is in Japanese .... what are these two lenses ??
https://cweb.canon.jp/eos/rf/lineup/rf40...uction.png
vs
https://cweb.canon.jp/eos/rf/lineup/rf80...uction.png
can anyone post a link for the optical formula of the Nikon's 800mm FL lens??