not this weekend, but the weekend before, I used the 10x50 for my late afternoon trips and the 10x42 SE midday Sunday. It was a good opportunity to compare the two formats. The SE was as good as ever, definitely outperforming my old companion the 10x40 P* Dialyt although not as well packaged or robust (though made more than well enough for my usage). I'm as happy with it (or more, really, now that I better understand how to handle it and fully appreciate its capabilities) as the day I bought it, back in the Covid year. The "austerity alpha" has met all my expectations and more.
The Docter shares the same magnification with the SE, but is an entirely different beast. It's a dinosaur, utterly different in conception and execution to most of today's birding binoculars. It is heavy, it is bulky, it is cumbersome, all of which are real disadvantages in a lot of the birding I do, and which is why I use the 10x42, with is classic combination of reach and handling, so much. I dislike its handling, which is significantly more awkward than its
distant uncle from Oberkochen, and I'm not a great fan of how most porros handle to begin with. Focus action, as with my other Nobilem, is too light for my taste (though precise, I prefer heavy, stiff, requiring deliberate effort to turn), and as with the older Spezial, I'm not sure the bridge assembly could not usefully have been beefed up (!!!). Eye relief is adequate (though no more than that) but after trying it with and without glasses I find myself very much preferring to use it without, which largely negates the advantage of long-ish eye relief.
Where it unquestionably shines, though, is when you look through it. Colour rendition, when first brought to my eyes, has a trace of the trademark Zeiss green/yellow, though my eyes rapidly adapt to it. Sweet spot and field of view are both generous and, though focus and diopter need to be quite carefully tweaked to wring out all its sharpness, once accomplished its ability to discern detail at distance is excellent, such that you almost want to seek out difficult targets to test it. At this time of the year twigs on bare branches far away enough that they look like hairline cracks are a decent test of sharpness. This thing absolutely aces that test. But its greatest advantage over the 10x42 is how it lets your eye relax and do its thing. At the end of the day your eyes are the most marvellous optical devices you can have, and the larger the exit pupil the more freedom the eye has to work as well as it can (to my mind anyway), which is of particular value when conditions are not perfect, when targets are difficult.
I have to admit after its previous owner handed it over to me I had a very serious attack of buyer's remorse. What on earth made me think I needed this 1.3kg beast when I already had an excellent 10x42? But there is a satisfaction in using a well executed 10x50, something extra it offers, that the SE, fine binocular though it is, just can't match. That's what keeps me coming back to mine, even though the old Zeiss West was outclassed in brightness and clarity (the Docter isn't). It's huge, ancient and unfriendly, an evolutionary dead-end - but does its job, optically, very well. If it's a dinosaur, it's a T-rex.
