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Message: <blockquote data-quote="Kevin Purcell" data-source="post: 1505588" data-attributes="member: 68323">This way happiness lies ... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />Seriously it's us hypercritcal nutters who are slowly going mad.But perhaps the same is happening to spotters as bins (even though it is a bit tougher) that the quality of lower priced scopes is improving to "adequate" levels.I would expect the Pentax to have much better color control for both logitudunal CA and (depending on your EP) transverse CA. Color frining on the Yukon should be more of a problem (though the smaller objective may be running at a large f/number too so that would help that a bit).Start looking at crows and antennas and roof edges ... high contrast bright background with darker objects.And as AP says: contrast (how black blacks can be) depends on scatter in the scope (between the lenses and prisms and off the walls of the scope); brightness depends on transmission through the scope. Both depend on the quality of the lens AR coatings. This should also show up when viewing black objects against a bright background (crows on roof lines work well!).</blockquote>