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#1
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Orion is claiming a 98 degree aparrent fov 7X32 binoculars for $119.
It advertises a 14 degree fov which does translate into a 98 degree aparrent fov. I've never heard of an eyepiece with this kind of afov. Can anyone verify this is really true? |
#2
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![]() "Darren Drake" wrote in message om... Orion is claiming a 98 degree aparrent fov 7X32 binoculars for $119. It advertises a 14 degree fov which does translate into a 98 degree aparrent fov. I've never heard of an eyepiece with this kind of afov. Can anyone verify this is really true? It is certainly physically possible, but I, too, have never heard of an AFOV that big. I wonder how sharp it is at the edges. The eye relief must be really short, too. |
#3
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It has 10mm ER so there is no way your going to see the full 98° AFOV or 14°
TFOV. I have a pair on order since I am a sucker for super wide field binos. Joe Ogiba |
#4
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![]() "Myriadimage" wrote in message ... It has 10mm ER so there is no way your going to see the full 98° AFOV or 14° TFOV. I have a pair on order since I am a sucker for super wide field binos. Why does 10mm eye relief rule out seeing the full 98-degree field? It implies that the eye lens must be at least 16 mm (or so) in diameter, but that's not impossible. |
#5
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"Why does 10mm eye relief rule out seeing the full 98-degree field?"
I have thirteen pairs of binoculars and the only way I can see the field stop in the ones that have more than 65° AFOV and 10mm ER is by turning my head with one eye to see it. When I put one of my 16mm Nagler T5's in my Pentax PF-80ED spotting scope in the daytime I only see about 60° AFOV without turning my head to see the field stop since it only has 10mm ER. I have a pair of 20mm Pentax XW's on order for my binoviewer since I like the 70° AFOV 20mm ER combo better than 82° 10mm ER . Joe |
#6
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By "turning my head" do you mean "turning my eye"?
The eye has to do that to take in a field of more than about 60 degrees. I took that for granted. "Myriadimage" wrote in message ... "Why does 10mm eye relief rule out seeing the full 98-degree field?" I have thirteen pairs of binoculars and the only way I can see the field stop in the ones that have more than 65° AFOV and 10mm ER is by turning my head with one eye to see it. When I put one of my 16mm Nagler T5's in my Pentax PF-80ED spotting scope in the daytime I only see about 60° AFOV without turning my head to see the field stop since it only has 10mm ER. I have a pair of 20mm Pentax XW's on order for my binoviewer since I like the 70° AFOV 20mm ER combo better than 82° 10mm ER . Joe |
#7
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I am sure I am not the only one that likes more than 10mm ER in UWA eyepieces.
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