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Ovni B + Apex ED x0.65

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#1 C. Thieullet

C. Thieullet

    Vendor - astromist

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Posted 12 July 2021 - 08:20 AM

Hello,

 

I made a successfull test with a Apex 0.65 focal reducer and an Ovni-B.

apm_maxload_encoder_overview.jpg

 

The optimal FOV of the apex is arround 22mm. Bigger than the clear aperture of the Ovni-B

In terms position, on my telecope, the focal is 1400mm (F5.5), so the apex should be at 55mm.

I am loosing close to 150mm of back focus.

ovnib_apex_x0.65_setup.jpg

I used a Baader prism. A 32mm clear aperture one. The optical path is 35mm.

So this allow to add a filter drawer.

On the other side I screw the Ovni-B M48 adapter as close as possible to the surface.

I should be close to 55mm because stars are pinpoint in the field.

 

Hope that's help

Cyrille

 


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