Cassegrain?
Cassegrain - . , . - , . , , .
Cassegrain 1672 , . , , . , , , , .
, . , , . . , , , . .
Cassegrain . Ritchey-Chr╘tien 1910 Chr╘tien. , . Ritchey-Chr╘tien , , , . Ritchey-Chr╘tien - .
. Dall-Kirkham 1928 . Dall-Kirkham , . , , , . , .
, Cassegrain catadioptric. , . ( ) , . Maksutov-Cassegrain, 1957, , , . , , .