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The reason the Ha scopes are not more expensive is because they are able to use a smaller internal etalon than front mounted filters. The etalon inside the Lunt 60mm scope is 35mm in diameter, but you still get equivalent performance to a 60mm front mounted filter.
I've compared the 60mm pressure tuned Lunt scope and their 50mm front mounted filter and the contrast and detail was best in the 60mm scope. The scopes are better value imo since you can get more aperture for your money.
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