Options:

The Esprits give best perfomance when used with the dedicated flatteners, choose to add it from the options menu beneath the price.
They really excel when finetuned and collimated and we can do that individually for your instrument.
We also do photographic tests to check the regularity of the star halo. No other dealer will get you that service.
Here are more informations about what we do and how we take care of this fine lenses:

Esprit optimizing and testing

You may choose the optimization from the options menu (together with flattener), and if you prefer to get also an interferometric measurement
and documentation of the tests BEFORE you buy, please choose certificate + flattener.