Takahashi Mewlon 250 mm f/3-f/12

OSLO model :

From : Vladimir Sacek : http://www.telescope-optics.net.

Radius of the diffraction limited flat field :

0.031° at 400 nm.

0.04° at 550 nm. This is equivalent to a 250 mm f/4.1 Newtonian.

0.051° at 656 nm

Takahashi Mewlon 250 mm f/3-f/12 with AiryLab 2.7× telecentric (f-ratio = 32)

Radius of the diffraction limited flat field :

0.037° at 400 nm.

0.049° at 550 nm.

0.058° at 656 nm

Takahashi Mewlon 250 mm f/3-f/12 with 3.5× telecentric (f-ratio = 42)

Radius of the diffraction limited flat field :

0.055° at 656 nm

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Takahashi Mewlon 250 mm f/3-f/12 with 4.2× telecentric (f-ratio = 50)

Radius of the diffraction limited flat field :

0.052° at 656 nm

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