Quote:
Originally Posted by Bart B.
The correct name for that adjustment on binoculars and spotting scopes is focus.
There's no reticle in them so it's impossible to see if any slight focus error exists. Therefore, there's no parallax.
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Don't confuse marketing lingo with function. I have seen more that a few scopes that have "side focus", "range finding focus", and "adjustable objective lenses", which are all paralax adjustments under other names. It does not matter what something is called. It matters what it does.