>>3291731>>3291732Don't listen to idiots OP. The 80D has on chip ADCs and has DR comparable to many current Sony and Nikon crop bodies, which is better than many older FF bodies.
High ISO won't be as good as modern FF, but I can tell you that sensor is very good through 3200 and usable at 6400. For most photographers arguing about higher ISOs is a stupid pissing match because they never have a good use for them.