From 1978 through to 1995 British Birds (
https://britishbirds.co.uk ) published the results of five surveys of the binocular and telescope choices of their members. I’ve attached copies. They give a clear idea of what were then UK birders preferences, and include list prices, along with popularity and overall performance ratings by the respondents.
In considering whether Swarovski was considered an Alpha brand, at least by UK birders during the period, I’d draw attention to the following:
ROOF PRISM vs PORRO
The Zeiss West and Leitz/Leica choices are roof prism models (by the time the surveys start, neither firm is making Porros suitable for birding). In contrast, for most of the period the only Swarovski’s featured are their traditional style Porro 10x40’s - referred to as the Diana. Only the 1995 survey includes Swaro’s SLC models (the 8x30 was introduced in 1985, and the x42’s in 1992).
POPULARITY
Zeiss West is the overwhelming choice; Leitz/Leica is a distant second, and; Swarovski is an equally distant third.
PERFORMANCE
In contrast, the three brands are rated much more closely, with the differences a matter of degree. Optically the ratings are suspect when one considers the comparison is of non-phase coated RP’s binos to Porro models (phase coating was first introduced by Zeiss in 1989, other manufacturers soon followed).
So it seems that at least for the great majority of UK birders - in terms of popularity - it’s not until the introduction of the x42 EL’s in 1999, that Swarovski is recognised as an Alpha binocular manufacturer.
A post by giosblue (
https://www.birdforum.net/showthread.php?t=313992 ) alerted me to the surveys. They can still be downloaded from the BB website using ‘binoculars and telescopes survey’ in the basic search function. The site includes access to articles from 1907 onward!
Googling around, I found that the Scottish Ornithologists’ Club also has an on-line archive from it’s first issue in 1958 (
https://www.the-soc.org.uk/about-us/scottish-birds-soc-s-journal ). From the early 1970’s onward there are advertisements for optics, which will be of interest to some forum members