Astrograph for digital photography
supplied by Jiří Drbohlav

Newton-lens photocorrector with a closed tube
Optical system is designed to pass the light through a corrector first and then is reflected from a primary mirror. The biggest advantage of this system is closed tube, corrected star images at the edge of the photo field.
This photo astrograph is built for digital cameras (Canon, Nikon), CCD and the design field diameter is 28 mm .
This visual system minimalize sphere aberation, coma, astigmatism and flat field.
The star size at the field edge is comparable to the star size at the axis.

Parameters and prices:

Diameter: 135 mm 175 mm 220 mm
Speed and focus: 4,2 / 550 4,2 / 750 4,5 / 1000
Price (Euro): 850 1 300 1 820

Sample:

Click on the preview to get the detailed description and photos made by that device.
Newton-lens photocorrector 135 mm Some photos taken by the astrograph of 220 mm / 4,5
Newton-lens photocorrector 135 mm Some photos taken by the astrograph of 220 mm / 4,5
Photos taken with the astrograph d=135 mm / f=500 mm and the photocamera Canon EOS 400D (the author: Pavel Rosa)
M81 M27 NGC2244 M51
Galaxies M81 a M82 The planetary nebula M27 The nebula NGC 2244 The Galaxy M51
M81 M8 + M20 NGC6960 M31
The planetary nebula NGC 7293 Nebulae M8 a M20 The nebula NGC 6960 The Galaxy M31
M42 M57 M45 M33
The nebula M42 The planetary nebula M57 Pleiades The Galaxy M33
M37
The stellar cluster M37

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