Center (this is Rigel) without and with the flattener. The stars aren't perfectly round due to my imprecise polar alignment.
| without flattener | with flattener |
 |  |
And the edge (not extreme edge)
| without flattener | with flattener |
 |  |
Monday, February 14, 2011
William-Optics 0.8X Reducer/Flattener II
I got this flattener sometime in September last year due to the amazing egg stars (field curvature) of my William-Optics Zenithstar 70ED small refractor. I haven't gotten around to making a before-and-after comparison until now.
Center (this is Rigel) without and with the flattener. The stars aren't perfectly round due to my imprecise polar alignment.
And the edge (not extreme edge)
Center (this is Rigel) without and with the flattener. The stars aren't perfectly round due to my imprecise polar alignment.
And the edge (not extreme edge)
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1 comment:
Good side-by-side illustration of what a flattener can do.
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