Vermessung 115 mm APO Refraktor

We had our APO 115mm refractor measured and analysed. Here you can find the results.

3-lenses, fully coated  115 mm aperture 800 mm focal lenght

Phase contrast

Ronchi

Interferogram

3 D Wavefront

Star-test with 20 µ pinhole in the focus with a 2,5mm eyepiece and the color filters.
For the F-line blue = 486.1 nm - For the F-line green. = 546.1 nm
For the F-line red = 656.3 nm
 

Measurement of the color-lenght-error
e - line / green 0
C - line / ret + 120
F - line / blue - 50
 

Intrafocal

K-Star

Extrafocal

Artificial Doppesstar 3,03“ distance (at 500x enlargement)
 

Strehl 0,98

3 D WAVEFRONT RELIEF
 

Height - graphic - highest peak 90nm

Spectrum after Rutherford and Vogel