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Message: <blockquote data-quote="APSmith" data-source="post: 1312243" data-attributes="member: 52350">I think I have found a problem with my original post.From Criteria #1 of my original post: "Sweet spot/FOV size (overall field -not just % of view)" I wasn't at all trying to say that Sweet Spot should be 100% (or 90%) of the FOV.  In fact, I consider that notion to be quite unrealistic.  What I was trying to convey was that both the Sweet Spot and the overall FOV would be important in the survey; but the Sweet Spot as a percent of the FOV is not so important (since FOV varies), but rather the actual angular size of the Sweet Spot irrespective of the overall FOV.  I apologize for the confusing language.  I would prefer to have measurements to go by (athough they can be misleading as well).  I understand that impressions are not always accurate and certainly not technically precise.  However, a consensus of impressions can be gleaned from research/surveys that in a lot of ways is more meaningful that the numbers.APS</blockquote>