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Fujinon 7X50 FMTRX (aka Polaris) is as high-end as you can imagine and it is a traditional Porro design.

John, thank you for posting the cutaway diagrams of Canon IS binoculars. I really appreciate your informative posts and the detailed illustrations that usually accompany them.

The prism arrangements in the Canon IS don't seem to be any new or innovative concept. They seem to be using the same arrangement as was used in Zeiss 20X60 stabilized binoculars or other large binoculars that have a fixed pair of barrels (IPD is changed on the eyepiece side). There are a few such arrangements. See Figs 20-23 in this nice historical review:

http://www.quekett.org/wp-content/uploads/2015/09/Wise-Binocular-Microscope-Development.pdf

Regards,
-Omid

<blockquote data-quote="Omid" data-source="post: 3877978" data-attributes="member: 16724">Fujinon 7X50 FMTRX (aka Polaris) is as high-end as you can imagine and it is a traditional Porro design. John, thank you for posting the cutaway diagrams of Canon IS binoculars. I really appreciate your informative posts and the detailed illustrations that usually accompany them. The prism arrangements in the Canon IS don't seem to be any new or innovative concept. They seem to be using the same arrangement as was used in Zeiss 20X60 stabilized binoculars or other large binoculars that have a fixed pair of barrels (IPD is changed on the eyepiece side). There are a few such arrangements. See Figs 20-23 in this nice historical review:<a href="http://www.quekett.org/wp-content/uploads/2015/09/Wise-Binocular-Microscope-Development.pdf" target="_blank">http://www.quekett.org/wp-content/uploads/2015/09/Wise-Binocular-Microscope-Development.pdf</a>Regards,-Omid</blockquote>

[QUOTE="Omid, post: 3877978, member: 16724"] Fujinon 7X50 FMTRX (aka Polaris) is as high-end as you can imagine and it is a traditional Porro design. John, thank you for posting the cutaway diagrams of Canon IS binoculars. I really appreciate your informative posts and the detailed illustrations that usually accompany them. The prism arrangements in the Canon IS don't seem to be any new or innovative concept. They seem to be using the same arrangement as was used in Zeiss 20X60 stabilized binoculars or other large binoculars that have a fixed pair of barrels (IPD is changed on the eyepiece side). There are a few such arrangements. See Figs 20-23 in this nice historical review: [url]http://www.quekett.org/wp-content/uploads/2015/09/Wise-Binocular-Microscope-Development.pdf[/url] Regards, -Omid [/QUOTE]

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