Optolong SII 6.5nm Narrowband Filter 36mm Unmounted (OPT-SII-65NM-36)

Optolong SII 6.5nm Narrowband Filter 36mm Unmounted (OPT-SII-65NM-36)Optolong improved narrowband SII6. 5nm filter (Sulfur II for CCD) is designed for nebula observation allowing 6. 5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.

In this way you can use the ED telescopes during the day

including three essential essays on binocular

98") with included adapters Phone Clamp Style: Easy load with internal spring Phone Clamp Range: 65mm - 90mm (2

The most popular cameras used for Prime Focus are Full-Size and APS-C sized Digital SLRs

An even lower eyecup with foldable winged eye shield especially serves for wearers of eyeglasses

The sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths

molded rubber grip ring for non-slip handling during observing sessions

If the balance is off on one-side or the other

depending on the type of glass

camping gear

5 mm NUMBER OF LENS ELEMENTS 8 NUMBER OF GROUPS 5 BACKFOCUS GAIN W

Removing the LS50FHa Solar Filter for night use