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Binoculars & Spotting Scopes
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Flat Field technology: the hows, the why's, the consequences
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<blockquote data-quote="Alexis Powell" data-source="post: 3162680" data-attributes="member: 5327"><p>Oh yes. A version of it was featured in the Nikon sport optics brochure (which I still have) that made me aware of the Classic Eagle in the first place. I spent a lot of time ogling that diagram and looking over the specs before I was able to save enough money to buy them ($500 at the time, and I was a teenager). I was almost afraid to touch them at first, they seemed so intricate, with all their precisely-joined metal parts, joined by screws or threading, but they are reassuringly very solid. They were miraculous for birding in several ways that I hadn't previously experienced, including having enough eye-relief to use with glasses, and having focus that didn't stiffen in the cold. Biggest faults were poor transmission, lack of phase correction (not a fault compared to other roofs when they were first released), and poor "hang". Note the lack of true internal focusing (the objectives move behind the waterproofing window). I still have them, along with a spare set of eyecups, and take them out birding occasionally for old time's sake.</p><p></p><p>--AP</p><p></p><p>PS -- To anyone interested in the Classic Eagle, it really is a fascinating binocular. Have a look at it, and compare the specs to other roofs of the time and it is clear that it was Nikon's attempt to make the finest birding/nature roof-prism binocular of the day (1984). It was a one-off design (no 10x or x32 equivalents) unlike any of Nikon's other bins before or since except a few styling similarities (e.g. of the focus knob) to the also unique 9x30 and 12x36 DCF Execulite models.</p></blockquote><p></p>
[QUOTE="Alexis Powell, post: 3162680, member: 5327"] Oh yes. A version of it was featured in the Nikon sport optics brochure (which I still have) that made me aware of the Classic Eagle in the first place. I spent a lot of time ogling that diagram and looking over the specs before I was able to save enough money to buy them ($500 at the time, and I was a teenager). I was almost afraid to touch them at first, they seemed so intricate, with all their precisely-joined metal parts, joined by screws or threading, but they are reassuringly very solid. They were miraculous for birding in several ways that I hadn't previously experienced, including having enough eye-relief to use with glasses, and having focus that didn't stiffen in the cold. Biggest faults were poor transmission, lack of phase correction (not a fault compared to other roofs when they were first released), and poor "hang". Note the lack of true internal focusing (the objectives move behind the waterproofing window). I still have them, along with a spare set of eyecups, and take them out birding occasionally for old time's sake. --AP PS -- To anyone interested in the Classic Eagle, it really is a fascinating binocular. Have a look at it, and compare the specs to other roofs of the time and it is clear that it was Nikon's attempt to make the finest birding/nature roof-prism binocular of the day (1984). It was a one-off design (no 10x or x32 equivalents) unlike any of Nikon's other bins before or since except a few styling similarities (e.g. of the focus knob) to the also unique 9x30 and 12x36 DCF Execulite models. [/QUOTE]
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Flat Field technology: the hows, the why's, the consequences
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