It is difficult to know what you mean by budget, the prices range from well over £2k to well under £100. Also what sort of portability is required, whether it is to be used on a heavy duty tripod or perhaps a monopod, whether a high mag is required for e.g. sea watching or or is it for just down on the local pond.
After a lot of researching the market I have purchased an Opticron GS 52 ED which has a 12x-36x HD eyepiece, is extremely lightweight, portable, rubber armoured, nitrogen purged, 30 yr warranty and it cost just £389. The optical quality is excellent and is as good as the Kowa TSN 4 that I sold a while ago because it was too heavy and cumbersome for my needs (not a scientific assessment!).
David
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