Thanks for the tip, Bruce. I ordered one from Amazon for $69 including shipping. It arrived today............
Henry
Henry ..... Glad you got one and thanks for posting the review covering both the technical characteristics and the practical application.
I have been out of town so I just got mine this evening. It is a good fit the 12.5X50 Bushnell Elite and the 10X43 Elite eyecups. The fit is a firm friction fit. I would not want to hike around with it attached for fear it would fall off, but it did stay attached with light shaking. It also fits the Nikon EDG II, but it does not go as far down on the eyecup because of arrows molded on the rim of the eyecup. It does not take much to remove it by hand so a slight bump could knock it off. To my surprise, it did survive the shake test on the EDG.
Eye placement is somewhat touchy, but quite workable. As expected, the field of view is noticeably smaller than with a straight binocular. The sharpness in the center is not bad with the 12.5, but does deteriorate rather soon. Considering the purpose is to identify something in the center view, I do not see this a problem for my intended use. The center view appeared much larger with the Nikon EDG 7X. I assume the EDG flat field view contributed to that. Actually, the view with the EDG was much better than I expected. My short test was near the end of day so I did loose a some brightness with the 12.5X50 but it was quite bright with the 7X42. Also, the color and contrast where fine, especially with the EDG.
Just for fun, I tried hand holding it with the 12.5X unbraced, and I was able to do it for short bursts. It gives me hope I will be able to view out the truck window without a tripod for a quick ID.
My intended purpose was to have something to fill in for a scope without having to have a scope and it looks like the Doubler will meet that goal. It does not compare in sharpness to a nice scope, but similar to what Henry said, it should work for getting an ID on something when there is just not enough magnification in a straight binocular. This is all in a small package at al low price. I am looking forward to using it out in the field.
Question .... Is there an advantage or disadvantage to place it on one barrel or the other. I ask this because most conventional binoculars have the diopter adjustment on the right barrel. Does this have any impact on the Doubler?