Mr. One Day...'s advice on buying binoculars is excellent.
Just adding some more points:
- the advantage of a wide objective lens (the objective lens is the big one) is in the field of view. Small, pocket, binoculars are functionally useless for hunting - at least in my experience - because it is like looking through a straw trying to pick up what you are looking for.
- in the old days, the way of checking the quality of the lenses was to look through the binoculars from the objective lens. That way any defect would be apparent. With modern computer-milled lenses, the quality is nowadays taken for granted.
- the advantage of after-sales repairs. Swarovski has an excellent reputation for no-quibble, free, repairs: NB. some of their new binoculars are sold without this lifetime warranty. Zeiss, I have had trouble with on a telescopic sight and eventually gave up on them. Leica seems to have a poor reputation.
Theoretically, at least, this ought to mean that one can buy a second-hand pair of Swarovskis confident that if something does go wrong, they will be repaired for free.
- the idea that one should buy the best binoculars, and buy them once, is sound enough if you are going to get a lot of use out of them and hunting is your passion. Otherwise, if they are going to spend most of the time sitting in a drawer, what is the point?
- there is a difference between the various models of binoculars - such as the Leica Trinovid HD, BN, and BA models, as they iteratively improved over time - but the improvement is so minor as to be irrelevant. Meanwhile, very good second-hand examples of the older models can be picked up for fractions of the price of the latest model (see below).
Going back to Mr. jpr9954's original post, he was wondering whether to upgrade and to what, and he could not afford a new pair of Leicas or Swarovskis.
My advice would be for him to look at the second-hand market. This would include eBay and the
invaluable and
liveauctioneers websites. Incidentally, looking at the realised prices, if he is prepared to put up with the aggravation of shipping and customs, he will find cheaper prices on the (British)
saleroom.com: here's a pair of
Zeiss 10x40s at an estimate of $100 (they won't go for that), and some
Leica 10x42s at a more realistic $300-odd. NB - always ask for a condition report before bidding, and be aware of the commission charged.
As I say, there seem to be any number of retirees who take up the hobby of gawping at birds and spend a fortune on binoculars and telescopes, which then turn up in essentially new condition at their estate sales.