Oh boy, some of you crack me up.
Of course that
in an ideal world you'd have a 40x spotting scope, a 10x35 pair of binocs and your old lady playing spotter, but the question is, if you are
forced by less than ideal circumstances to use a scope for thread ID, then what type of scope would be most practical.
Some of you shouldn't be so quick to be so sanctimonious, my high priests of impeccable firearm safety.
For example, let's say that it is Hurricane Katrina II, no intrepid law enforcement is around to come to help, and some dangerous looking dudes around 100 yards away or more are converging on your position, or are even taking pot shots your way and for some reason you can't retreat (wounded, or sick family member, etc.) and you forgot your 40x spotting scope, you lost or cracked your 10x35 binoculars, and your spotter with the telescope took a wrong turn and didn't make it. Are you telling me that you would refuse to use your rifle mounted scope to ID the nature of the threat?!
For a real life example, during the Rodney King riots some of the Korean liquor store owners were up on their roofs returning fire with handguns at longer range threats that were shooting at them and converging on their stores to destroy their life's work and possibly their very lives. How much better it would have been had they had long guns with good optics that could answer questions like: "gee is that person behind that bush 75 yards away just some kid playing with a stick/toy gun or a gang banger trying to maneuver on my position", or, "gee is that shadow in that window a block away the thug shooting covering fire for the thugs trying to firebomb our liquor store, or merely an innocent person".
In those types of extreme situations, a good scope can help you realize that a previously identified "threat" might instead be a total innocent. But darn, if you just so happen to have your 40x spotting scope, or even your 10x35 Binoculars, that of course have been grafted to your shanks, then by all means, use those instead
.