Yesterday I received the Geco Gold 12.5x50 (see
New Binocular Bargains Thread) and today it is going back to the sender. Unfortunately, the diopter compensation is actually only +/- 2.5 dpt - not enough for me. My further impressions :
First of all, the Geco Gold 12.5x50 is absolutely identical to the
GPO Passion HD 12.5x50 except for the labeling. In my opinion, they are optically and mechanically excellent binoculars that can easily keep up e.g. with a Leica Trinovid or Zeiss Conquest. The materials and workmanship are of high quality and inspire confidence. The center of the image is very sharp, contrasty and practically free of CA. Field curvature, a drop in sharpness and some false colors can be seen at the edges of the image, but ultimately this is not critical and the sweet spot is large enough. The FOV is only average, but okay. The color balance seems to me to be slightly shifted towards green/yellow. In low light, the image looks bright and vivid. For what it offers, the current special price of 620 euros is a bargain. Highly recommended for those looking for something like this.
Despite this, I in person didn't like it. On the one hand, of course, because of the poor diopter adjustment: the range of +/- 2.5 dpt is too small for my personal diopter difference of about 3.5 dpt - a deal stopper. Besides, I find it annoying that the range is stated as +/- 4.0 dpt in the accompanying booklet. However, you can clearly see from the scale underneath the focus knob and its 10 - by the way pretty hard - click stops (each 0.5 dpt) that the published GPO specification of +/- 2.5 dpt is correct. Probably irrelevant for most people, but not for me and also sloppy for a supposedly premium product. It makes you wonder what else is wrong.
On the other hand, the square edges of the otherwise excellent eyecups are uncomfortable for me and I find the sticky-smooth inner surfaces of the rubber armour unpleasant to the touch (would have preferred a grained surface). In addition, the somewhat muddy movement of the focus knob and the reversed setting direction compared to my Leica binos bother me. Overall, the Geco Gold 12.5x50 simply didn't appeal to me enough, it left me cold, so I probably wouldn't have kept it even if it had a larger diopter range - regardless of the extremely low price. But that's just me and your mileage may vary.
Hence, again: For what this bino offers, its price of 620 euros is a bargain.