rocketman

[rocketman]

Hi Massimo,
first of all thank you for the precise and complete clarification.
My RC is not a lattice model but it is a closed tube, So now I ask, definitely would agree to remove the lens hood? This I ask because in the flat I have a strange vignetting that I can not solve and the last resort is just the hood. In the flat you see a black hole at the center and the edges of all white. Obviously I worked to rule out other causes, and none of the solutions has therefore worked my doubt focused on the lens hood.
Thank you
Antonino

[rocketman]

If the back focus we mean by the center of the mirror is 230 mm

[rocketman]

Hi Massimo,
the data I have known at the time of the system are as follows:

mirror Diameter: 510 mm
Diameter Secondary Mirror: 178 mm
Hole diameter primary mirror: 114 mm
Distance between primary and secondary: 1150 mm
primary hood Length: 350 mm
Primary hood diameter: 80 mm
Secondary hood Length: 95 mm
Secondary hood diameter: me 178 mm max 194 mm
Backfocus: 150 mm

I wonder what you think about and if it is possible to extract useful data to optimize the system.
Thank you

[rocketman]

Thank you for your prompt response.
Unfortunately I do not find the required data as the manufacturer of the mirror is not provided me with its datasheets.
Since I'm trying to optimize the system because I think there are several errors, both optical and mechanical to be corrected, I am now stuck. How I could rtovare the effective focal both the primary mirror and secondary?

[rocketman]

Thanks Massimo, se passi in zona fammi un fischio. Un caro saluto….

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