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Filters

Items 1 - 25 of 75

Optolong OIII CCD 12nm Filter - 31mm Unmounted - OIIICCD12NM-31U

SKU: OTL-OIIICCD12NM-31U
  • Filter Type: OIII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
$130.00 $99.95
 
Astronomik 31 mm CLS Light Pollution Filter

Astronomik CLS Light Pollution Filter - 31 mm Round - CLS-31

SKU: ASF-CLS-31
  • Filter Type: CLS/LPR
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$95.95
 

Optolong OIII CCD 6.5nm Filter - 31mm Unmounted - OIIICCD65-31U

SKU: OTL-OIIICCD65-31U
  • Filter Type: OIII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
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$189.00
 
Optolong SII Unmounted Filter

Optolong SII CCD 12nm Filter - 31mm Unmounted - SIICCD12-31U

SKU: OTL-SIICCD12-31U
  • Filter Type: SII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$153.00 $125.00
 
Optolong SII Unmounted Filter

Optolong SII CCD 6.5nm Filter - 31mm Unmounted - SIICCD65-31U

SKU: OTL-SIICCD65-31U
  • Filter Type: SII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$193.00
 
Optolong H-Alpha Unmounted Filter

Optolong H-Alpha 7nm CCD Filter - 31mm Unmounted - HAL7-31U

SKU: OTL-HAL7-31U
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$190.00
 

Optolong LRGB CCD Filter Set - 31mm Unmounted - LRGB-31U

SKU: OTL-LRGB-31U
  • Filter Type: RGB
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$291.00
 

Optolong UBVRI Filter Set - 31mm Unmounted - UBVRI-31U

SKU: OTL-UBVRI-31U
  • Filter Type: Photometric (UBVIR, Johnson-Cousins)
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$740.00 $481.00
 
Optolong UVIR Cut Unmounted Filter

Optolong UV-IR Cut Filter - 31mm Unmounted - UVIR-31U

SKU: OTL-UVIR-31U
  • Filter Type: UV/IR/Luminance
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$55.00 $44.00
 
Astronomik 31 mm Round Mounted MC Clear Glass Filter

Astronomik MC Clear Glass Filter - 31 mm Round - C-31

SKU: ASF-C-31
  • Filter Type: Clear
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$49.95
 

Astronomik CLS-CCD Light Pollution Filter - 31 mm Round - CLSCCD-31

SKU: ASF-CLSCCD-31
  • Filter Type: CLS/LPR
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$109.95
 
Astronomik 31 mm Round H-Alpha 12 nm CCD Filter

Astronomik H-Alpha 12 nm CCD Filter - 31 mm Round - HA12-31

SKU: ASF-HA12-31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$169.95
 
Astronomik 6 nm H-Alpha Filter in 31 mm Format

Astronomik H-Alpha 6 nm CCD Filter - 31 mm Round - HA6-31

SKU: ASF-HA6-31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$249.95
 
Astronomik 31 mm Round LRGB Filter Set

Astronomik LRGB Filter Set - 31 mm Round - LRGB-31

SKU: ASF-LRGB-31
  • Filter Type: RGB
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$319.95
 
Astronomik 31 mm Round UHC Filter

Astronomik UHC Filter - 31 mm Round - UHC-31

SKU: ASF-UHC-31
  • Filter Type: UHC
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$109.95
 
Astronomik OIII 12 nm CCD Filter - 31 mm Round

Astronomik OIII 12 nm CCD Filter - 31 mm Round - OIIICCD-31

SKU: ASF-OIIICCD-31
  • Filter Type: OIII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$169.95
 
Astronomik 31 mm Round SII 12 nm CCD Filter

Astronomik SII 12 nm CCD Filter - 31 mm - SII-31

SKU: ASF-SII-31
  • Filter Type: SII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$169.95
 

ZWO LRGB Filter Set - 31mm Unmounted - LRGB-31

SKU: ZWO-LRGB-31
  • Filter Type: RGB
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
$169.00
 

ZWO H-Alpha 7nm CCD Filter - 31mm - HA31

SKU: ZWO-HA31
  • Filter Type: H-Alpha
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$149.00
 

ZWO SII 7nm Filter - 31mm - SII31

SKU: ZWO-SII31
  • Filter Type: SII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$149.00
 

ZWO OIII 7nm Filter - 31mm - OIII31

SKU: ZWO-OIII31
  • Filter Type: OIII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$149.00
 

ZWO 31mm Narrowband Filter Set - OIII, Ha, SII - NBSET-31

SKU: ZWO-NBSET-31
  • Filter Type: Narrowband Set
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$425.00
 
Baader Planetarium 31 mm Round Unmounted UV-IR Cut Luminance Filter

Baader 31 mm UV-IR Cut L-Filter - FUVIR-RD31

SKU: BAD-FUVIR-RD31
  • Filter Type: UV/IR/Luminance
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
$60.00
 
Astronomik OIII 6 nm CCD Filter - 31 mm Round

Astronomik OIII 6 nm CCD Filter - 31 mm Round - OIIICCD6-31

SKU: ASF-OIIICCD6-31
  • Filter Type: OIII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$249.95
 
Astronomik 31 mm Round SII 6 nm CCD Filter

Astronomik SII 6 nm CCD Filter - 31 mm - SII6-31

SKU: ASF-SII6-31
  • Filter Type: SII
  • Filter Size: 31 mm
  • Filter Shape: Round
  • Filter Insert Style: Drop-In
Free shipping Free shipping
$249.95