j'ai trouvé ca mais je ne comprends pas bien.....et ouis j'ai l'impression que dit que l'avantage du HP c'est pas determinant...
Standard Eye-Level Finder
The DE- 2 was the only eyelevel finder that came with the Nikon F3 during the early days before the High Eyepoint model DE-3 was introduced in 1982.
It affords a slightly more compact camera profile. Projects a fairly large image view with 0.8X magnification with the 50mm lens set at infinity.
It was silver-coated inside the pentaprism to provide an extraordinarily brilliant, clear image with good corner-to-corner visibility. The eyepiece is rubber-cushioned for comfortable viewing and prevents scratching of eyeglasses. A built-in eyepiece shutter prevents strong extraneous light from affecting meter accuracy when your eye is away from the finder (as in self-timer use or remote operation).
It uses DK-4 Rubber Eyecup for comfort viewing, but the eyecup was not very well designed and often dropped out, Nikon subsequently redesigned a locking system in the DK-2 for the High Eyepoint Finder and it was marvelous, I have not changed a eyecup for more than 12 years !
High-Eyepoint Finder DE-3 (DE-4 for Titanium version)
The High-Eyepoint finder was made as a standard prism on Nikon F3 in later years, including variants such as Nikon F3T (Titan) which has a similar finder made of one of the best known industrial metal, titanium.
The finder with the tough metal is referred as DE-4, but it is NOT available as an optional accessory for the regular F3.
Some of the commercial photographic books stated HP finder was made available in 1983. However, contradictory they also mentioned the F3 Titan was introduced in 1982 - with a DE-4 finder which essentially is an DE-3 in titanium outfit. Well, I would love to believe it was in both in 1983, the year where I bought my F3T.
Technical highlight of this prism is - the entire frame, including exposure information, is visible with the eye up to 25mm (approx. 1 inch) away from the eyepiece. 0.75X magnification with the 50mm lens focused at infinity. This provides certain degree of eye relief for extended shooting sessions. But on a more practical note, for those glass wearer, shooting behind a protective helmet or even wearing a goggles or protective mask (In this case, the action finder should be more functional), this should come in very handy and useful.
It also has a Eyepiece Shutter built in. If you have already owned a DE-2 eyelevel finder, you don't have to rush out to buy a High Eyepoint Finder - other than if you think the High-Eyepoint feature will benefit you a lot, because other than that - the high eye point finder has no other significant purpose for a justification. Some would say, ahh... it looks better which I might agree but don't intend to argue too much if we are talking about justification for the amount you have to spend for the extra.
No doubt the High Eyepoint finder Looks more like a perfect match in the exterior appearance with an F3, but inside the viewfinder, the reality of High Eyepoint also means you will have to live with a smaller magnification than the regular DE-2 finder's 0.8X magnification (This means smaller image will project inside the viewfinder). Other than these two elements which might be useful or don't very much depends on personal needs, there are no significant advantages over the standard eye level DE-2 finder. Personally suggestion: Consider fix a DK-2 Rubber Eyecup onto your High Eyepoint finder, it should be a good companion for viewing and focusing, with or without wearing glasses.
http://www.mir.com.my/rb/photography/hardwares/classics/nikonf3ver2/finders/finder2.htm#de4