Player One Astronomy Photosphere 7.5 nm S-series 1.25" / 31.8 mm filter

Player One Astronomy Photosphere 7.5 nm S-series 1.25" / 31.8 mm filter

Player One S series filter using high quality optical glass substrate and multi-layer composite coating technology, which has excellent optical performance in astrophotography.

1.25" Photosphere 7.5 nm filter (Photosphere enhanced filter).

Photosphere filter is an assistant filter, telescope must use baader film or Herschel wedge for adequate reduction of sun light, then you can use this filter for imaging.

Photosphere filter is a narrowband filter, CWL is 540nm, bandwidth 7.5 nm

Where should I setup my photosphere filter?

Usually, we recommand to setup your photosphere filter on T-mount, this also can help you against dust drop on camera glass.

• Specifications: 1.25", thread M28.5*0.6
• Frame thickness: body 5 mm+ thread 2 mm, a total of 7 mm
• Thickness of filter lens: 2 mm
• Bandwidth: 7.5 mm
• CWL (center wavelength): 540 nm
• PV: 1/4 lambda
• Transmittance: ~97%
• Blocking depth: OD4