| 1. | Another French design emerged in 1841, created by anastigmat lens in 1889.
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| 2. | It is a specific instance of the Dagor type double-meniscus anastigmat.
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| 3. | The SNAP will use an optical setup called the three-mirror anastigmat.
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| 4. | In fact, Paul Rudolph designed the Anastigmat with two cemented doublets in 1890.
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| 5. | When this element is a mirror, the result is a three-mirror anastigmat.
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| 6. | Unlike other triplets, the Leitz Anastigmat has the diaphragm between the first and second elements.
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| 7. | The design phase of the 5-mirror anastigmat was fully funded within the ESO budget.
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| 8. | When this element is a mirror, the result is a " three-mirror anastigmat ".
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| 9. | It is a 6-element, 2-group, symmetric anastigmat design somewhat related to the Goerz Dagor.
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| 10. | The lens has five elements in three groups the third group being three cemented elements and was initially called the Leitz Anastigmat.
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