[Maine-birds] binocular recommendations?

I have been using some inherited 30-year-old Zeiss 10x40s. (Dialyt 10x40 B T*)   They are very bright and good for anything further than 16 feet away, but have no close focus and are on the heavy side.

I know there have been a lot of improvements in binoculars in recent decades. 

Questions:

Is it worth buying something newer?

And how much would it cost?  (I am looking to stay under $500.)

Thanks,

Anne

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