Lumicon
The LP1020 Step Ring has 49mm exterior/male threads and 48mm interior/female threads, both with thread-pitch of 0.75mm.
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#56, Green Filter, 1.25". Wratten No. 56 Equivalent.
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T-ring for Nikon SLR / DSLR cameras.
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Optional T-Thread Adapter for photographic use with 2" Multiple Filter Selector to maintain low profile. Note: Some Newtonians and short focal length Refractors may have trouble reaching focus with this accessory.
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SCT Female - 2" Female Adapter.
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The Lumicon 1.25" 90 degree Correct Image Diagonal provides a corrected image (left/right; up/down) for finder and spotting scopes. May also be used on refractors and SCTs. Includes filter threads.
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The Lumicon Dust Seal keeps dust and insects out of your telescope. The filter used is a plane-parallel polished surface substrate that blocks ultraviolet radiation but passes all visible light with minimal absorption, no aberration, and no noticeable internal reflection. The filter mounts on the back of your SCT and accepts all attachments. Fully Multi-Coated.
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The Lumicon Dust Seal keeps dust and insects out of your telescope. The filter used is a plane-parallel polished surface substrate that blocks ultraviolet radiation but passes all visible light with minimal absorption, no aberration, and no noticeable internal reflection. The filter mounts on the back of your SCT and accepts all attachments. Fully Multi-Coated.
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Lumicon Minus Violet and Infrared Blocking Filters are used primarily to "bracket" the color-corrected band of refracting telescopes. The Minus Violet and Infrared Blocking Filters can also be used as "visible" filters in RGBV (red-green-blue-visible) astrophotography with reflecting telescopes. The larger Minus Violet filters are for telephoto lenses.
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