Some comments after only very brief use;
And note these might be a previous version as they take two AAA batteries and cost £570.
Opticron spec say the 16x42 takes one AA. And other shops sell at £850, (note Kite are £1100 and Sig £1200).
I'd seen them in the shop a week ago, so opening the box I only glanced at the accessories, decent ocular covers, pretty average neck strap and carry case.
It takes some effort to 'get there'. They are light for me, easily held in one hand. I didnt weigh them but they must be about 600-650g.
The IP, the diopter, the focus were all stiff, new out of the box. The eyecups adjust like NL but are quite loose, four positions. The focus wheel is at the far end and small, ring finger operation.
Sat in the garden it took me over half an hour of blackouts and glare before I found a working, comfortable and stable position, one click out resting on my eyebrows.
If you think 10x32 are finicky, or NL require thought and concentration to set, these could be something of a challenge. And that focus wheel works, but is not good.
The Opticron glass is perfectly adequate.
Where it shines is for identification as you get what it says on the tin.
Flick that switch and there's a stable close up 16x image of ... a young goldfinch... bins held with one hand and eating a sandwich with the other 😆
You may have to readjust the diopter setting a little after the first IS. My right eye was a bit achy after half an hour of adjustments. Still, got there.
Once set and in use you notice the not wide field of view, Opticron state 66m or 198ft on the current spec.
No way will it be easy to follow birds in flight.
However for ID of birds pecking on the scrape or shoreline at distance (which we see quite a lot) they are likely to be very useful. A bargain.
They were bought to complement 8x44 Steiner Discovery.
P.S.
Also bought were some Hawke 10x25 to carry everywhere. I didn't get on with these at all haptically when tried in the shop, simply didn't fit to my eyes.
Of the four pockets offered in the shop I'd have the Kowa genesis.