Before ordering a NextGEN telecompressor, determine the diagonal dimension of your CCD image chip. If it is less than 9 mm then you can use either the NGM 0.33X or the NGW 0.50X model. If it is over 9 mm but less than 17.5 mm, then only the NGW 0.50X is suitable. If a larger CCD is used, the corners will not be as sharp as the center and there may be some vignetting.

 

 

Before ordering a NGUW 0.62XL, determine the diagonal dimension of your CCD imaging chip. If it is over 18 mm,  then you will suffer image degradation and vignetting in the corners of the image.

 

 

 

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Go to the "Mounting Plates" page and select the adapter plate that fits your camera. If you do not see your camera listed, call or email Optec with a description of your camera.  See link to the page on the left in NextGEN Navigator

 

 

While it is recommended that filters should be mounted in front of the reducer, the NGM and NGW are compatible with the CFW-8/10 and other color filter wheels. Note that there are different mounting plates for the SBIG camera with and without filter wheel.

 

 

The NGM comes with a Violet Light Rejection filter as standard while the NGW does not.  The NGW has better color correction in the blue and normally does not require the Violet Light Rejection filter. That said, the modern CCD is very sensitive to deep violet and long wave UV, and it is difficult to fully correct for these wavelengths in any refractive optic. Better star images would be obtained in any telescope system that has refractive optics if the Violet Light Rejection filter is used. The Optec RGB filter set blocks deep violet light and a rejection filter is not needed.

Go to the "Mounting Plates" page and select the adapter plate that fits your camera. If you do not see your camera listed, call or email Optec with a description of your camera.  See link to the page on the left in NextGEN Navigator