Takahashi TOA 130 and 150



Spot diagrams of Takahashi TOA 150 in near-UV (393 nm) - Source : Takahashi

Spot diagrams of Takahashi TOA 130 in near-UV (393 nm)

OSLO simulations based of Vlademir Sacek OSLO model (https://www.telescope-optics.net/semiapo_and_apo_examples.htm)

According to the approximate OSLO model, the Takahashi TOA 130 is diffraction limited at 393 nm up to 0.258° (= 4.5 mm)  away from the optical axis. This is enough to cover the solar disk:

Spot diagram up to 10 mm from optial axis at 393 nm:


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