TMB152s with >97% do exist, but that is not a good criteria to
discriminate between two scopes.
The 97% and the 95% scope will show virtually identical images, not
to mention that there is no way to be certain that the 95, 96, and 97
strehl scopes are actually different since the measurement was
generally a one-shot process and therefore not necessarily accurate
in the absolute. Accordingly, I have seen lower strehl scopes
outperform (to my eye) higher strehl scopes.
--- In tmboptical@y..., "doc_bob12000" <doc_bob12000@y...> wrote:
> have a lens with a Strehl higher than .97?
> I have beem looking to purchased a used 152 and all 3 parties I
> contacted had Strehl values in the .95x range.
> Is this typical of the TMB152s?
> Please do not take offense -- I am merely looking for a superb
> with which to use for planetary observations.
> Any help would be appreciated.