Feature(may vary by option.)

●Visual and photographic filters for contrast enhancement at all Newtonian and SC-mirror telescopes.
●The effect of the element neodymium as filter material is very impressive. When added to optical glass it boosts contrast, increases the red colour in the image (especially for Mars & Jupiter)
●Plane-optical polished; can be used [well before the focal point.] without any loss of sharpness as a single filter in front of a binocular or for afocal projection with digital cameras.
●Scope of delivery: NEODYMIUM 1 1/4 inch(Moon & Skyglow) filter, filter box

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Description

Neodymium Moon and Sky-glow filter with built-in IR blocker and PG-coating

- a selective contrast filter, particularly suitable for all reflecting telescopes

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    - blocks particular regions in the visible spectrum where street lamp lighting and sky-glow due to scattered light are particularly irritating

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      - selective blocking reduces glare, but without reducing the ability to see important colour and brightness differences

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        - light transmission in the selected spectral ranges is over 95 %

          - Fits in all standard filter threads; and can be combined, for example, with the plane-optical polished Baader IR cutting filter! So blur from unfocused infrared can be prevented - an absolute must for digital astrophotography

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          - plane-optical polished; can be used without any loss of sharpness as a single filter in front of a bino-viewer or for afocal projection with digital cameras (far away from the focal point!)

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            - stars appear much sharper when it is used with a DSLR camera due to the blocked IR range of the spectrum

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              - no drop in sharpness with magnifications above 200X, in contrast to flame polished filter glasses

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                - substrate (glass melt): neodymium doped coloured glass

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                  - coating: 7-ply multi-layer hard coating / bullet-proof dielectric IR blocking coating

                  - Hardened on both sides (ion beam hardened), absolutely scratch-resistant, water-resistant coating - can be cleaned as often as required