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allhoest

Pousser la focale du 250 en Ha. Ou il faudrait dire pousser le F/D.

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Le T250 solaire est taillé à F7, pour être combiné à une télécentique x4 et atteindre un F/D de 28.

Pour espérer un meilleur contraste, et aussi une meilleure résolution, le F/D a été poussé à 35.

La focale résultante est proche de 9m.

L'image est une mosaïque de 3 champs primaires.
 

20170927-20170829_01_S02_21_03_09h5m_...

 

Alexandre
2017Aug29
Solar newton T250
Telecentric x4 + GWK x1.25
Solar spectrum
ZWO ASI174

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