The Pentax gold coated eyepieces are well known, and were a mistake that Pentax changed rather quickly.
I have several and don't like the coloured view at all.
There is a Soviet 8x30 binocular with a 13 degree field.
The very wide angle Porros seem common in the U.S. but less so here.
The Minolta Standard MK 8x40 has a 9.5 degree field, the 7x35 11.05 degrees measured.
The 10x50 7.8 degrees, although only 7.65 degrees if one doesn't get close to the eyepieces.
I used the 10x50 as my only binocular for ten years, besides the 20x60 and 20x80.
There was an EWA Zeiss binocular a long time ago.
The Koehler submarine periscope eyepiece was 120 degree AFOV.
The Ascot/ Bresser 7x32 has a 13 degree field. Also made in 8x40 over 11 degrees and 10x50.
But awful distortions from the mirror/prisms.
I have long complained of the miserably small fields of modern binoculars and, for me, excessive eye relief.
I have many good 10x50s with 7.5 to 7.9 degree fields, which all well made and give good images.
The 6x24 Amplivid and Komz 6x24 both have 12.2 degree fields.
I prefer the Amplivid as it goes in my pocket, but the image is rather dim because of the old mirror prisms.
For astronomy I prefer 82 to 92 degree eyepieces and don't like 100 degree eyepieces.
I prefer using the Swift 8.5x44 HR/5 to the 8x30 EII, even though the latter is better and doesn't have the flare problems of the HR/5.
Also the Komz 12x45 easily outresolves the 10x35 EII hand held.
Again the 10x35 EII is very nice but I prefer the Komz.
The Karlstein (Steiner) 6x25 micro binocular with 11.5 degrees is nice but a bit fat for the pocket.
I agree that multicoating old EWA binoculars would produce better results.
Regards,
B.
P.S.
A good example of the VisionKing 5x25 with 15 or 15.8 degree field is nice.
The Kronos 6x30 has a 12.5 degree field, with 7x35, 8x40 and 10x50 versions.
Mine are mechanically shoddy, but some seem to be better.