Eyepiece Calculator

Eyepiece: Choose one of these or enter your own specs. -- Anacortes Telescope -- 11mm Bird's Eye View 1.25" 15mm Bird's Eye View 2.0" 16mm Bird's Eye View 1.25"   -- Baader Planetarium -- Hyperion Modular 3.5mm Eyepiece Hyperion Modular 5mm Eyepiece Hyperion 8mm Eyepiece Hyperion 13mm Eyepiece Hyperion Modular 17mm Eyepiece Hyperion Modular 21mm Eyepiece Hyperion Modular 24mm Eyepiece Hyperion Aspheric 31mm Eyepiece Hyperion Aspheric 36mm Eyepiece   -- Celestron -- 5mm Ultima LX Eyepiece 1.25" - 2.0" 8mm Ultima LX Eyepiece 1.25" - 2.0" 13mm Ultima LX Eyepiece 1.25" - 2.0" 17mm Ultima LX Eyepiece 1.25" - 2.0" 22mm Ultima LX Eyepiece 2.0" 32mm Ultima LX Eyepiece 2.0" Axiom LX 7mm Eyepiece 1.25" Axiom LX 10mm Eyepiece 1.25" Axiom LX 15mm Eyepiece 1.25" Axiom LX 19mm Eyepiece 2.0" Axiom LX 23mm Eyepiece 2.0" Axiom LX 31mm Eyepiece 2.0" Omni Plossl 6mm 1.25" Eyepiece Omni Plossl 9mm 1.25" Eyepiece Omni Plossl 12mm 1.25" Eyepiece Omni Plossl 15mm 1.25" Eyepiece Omni Plossl 20mm 1.25" Eyepiece Omni Plossl 25mm 1.25" Eyepiece Omni Plossl 32mm 1.25" Eyepiece Omni Plossl 40mm 1.25" Eyepiece   -- Meade -- Series 4000 QX 15mm Eyepiece Series 4000 QX 20mm Eyepiece Series 4000 QX 26mm Eyepiece Series 4000 QX 30mm Eyepiece Series 4000 QX 36mm Eyepiece Series 4000 Super Plossl 6.4mm Eyepiece Series 4000 Super Plossl 9.7mm Eyepiece Series 4000 Super Plossl 12.4mm Eyepiece Series 4000 Super Plossl 15mm Eyepiece Series 4000 Super Plossl 32mm Eyepiece Series 4000 Super Plossl 40mm Eyepiece Series 4000 Super Plossl 56mm Eyepiece Series 5000 Plossl 5.5mm Eyepiece Series 5000 Plossl 9mm Eyepiece Series 5000 Plossl 14mm Eyepiece Series 5000 Plossl 20mm Eyepiece Series 5000 Plossl 26mm Eyepiece Series 5000 Plossl 32mm Eyepiece Series 5000 Plossl 40mm Eyepiece Series 5000 Super Wide 16mm Eyepiece Series 5000 Super Wide 20mm Eyepiece Series 5000 Super Wide 24mm Eyepiece Series 5000 Super Wide 28mm Eyepiece Series 5000 Super Wide 34mm Eyepiece Series 5000 Super Wide 40mm Eyepiece Series 5000 Ultra Wide 8.8mm Eyepiece Series 5000 Ultra Wide 14mm Eyepiece Series 5000 Ultra Wide 18mm Eyepiece Series 5000 Ultra Wide 24mm Eyepiece Series 5000 Ultra Wide 30mm Eyepiece   -- Orion -- 6.3mm Sirius Plossl 1.25" Eyepiece 7.5mm Sirius Plossl 1.25" Eyepiece 10mm Sirius Plossl 1.25" Eyepiece 12.5mm Sirius Plossl 1.25" Eyepiece 17mm Sirius Plossl 1.25" Eyepiece 20mm Sirius Plossl 1.25" Eyepiece 25mm Sirius Plossl 1.25" Eyepiece 32mm Sirius Plossl 1.25" Eyepiece 40mm Sirius Plossl 1.25" Eyepiece 6mm Expanse Wide Field 1.25" Eyepiece 9mm Expanse Wide Field 1.25" Eyepiece 15mm Expanse Wide Field 1.25" Eyepiece 20mm Expanse Wide Field 1.25" Eyepiece 16mm Edge-On Flat Field Eyepiece 1.25" 19mm Edge-On Flat Field Eyepiece 1.25" 27mm Edge-On Flat Field Eyepiece 1.25" 26mm Q70 2" Super Wide Angle Eyepiece 32mm Q70 2" Super Wide Angle Eyepiece 38mm Q70 2" Super Wide Angle Eyepiece 35mm DeepView 2" Eyepiece 42mm DeepView 2" Eyepiece   -- Pentax -- SMC XO 5mm Eyepiece 1.25" SMC XW 3.5mm Eyepiece 1.25" SMC XW 5mm Eyepiece 1.25" SMC XW 7mm Eyepiece 1.25" SMC XW 10mm Eyepiece 1.25" SMC XW 14mm Eyepiece 1.25" SMC XW 20mm Eyepiece 1.25" SMC XW 30mm Eyepiece 2.0" SMC XW 40mm Eyepiece 2.0"   -- Stellarvue -- 9mm FMC Plossl Eyepiece 1.25" 12mm FMC Plossl Eyepiece 1.25" 23mm FMC Plossl Eyepiece 1.25" 32mm FMC Plossl Eyepiece 1.25" 15mm FMC Wide Field Eyepiece 1.25" 20mm FMC Wide Field Eyepiece 1.25" 30mm FMC Wide Field Eyepiece 2.0" 42mm FMC Wide Field Eyepiece 2.0"   -- Takahashi -- LE 10.0mm Long Eye Relief Eyepiece LE 12.5mm Long Eye Relief Eyepiece LE 18mm Long Eye Relief Eyepiece LE 24mm Long Eye Relief Eyepiece LE 30mm Long Eye Relief Eyepiece LE 50mm Long Eye Relief Eyepiece LE 2.8mm ED Long Eye Relief Eyepiece LE 3.6mm ED Long Eye Relief Eyepiece LE 5mm ED Long Eye Relief Eyepiece LE 7.5mm ED Long Eye Relief Eyepiece   -- Tele Vue -- 3mm Radian Eyepiece 4mm Radian Eyepiece 5mm Radian Eyepiece 6mm Radian Eyepiece 8mm Radian Eyepiece 10mm Radian Eyepiece 12mm Radian Eyepiece 14mm Radian Eyepiece 18mm Radian Eyepiece 2mm-4mm Nagler Zoom Eyepiece 2.5mm Nagler Type 6 Eyepiece 3.5mm Nagler Type 6 Eyepiece 4.8mm Nagler Type 1 Eyepiece 5mm Nagler Type 6 Eyepiece 7mm Nagler Type 6 Eyepiece 9mm Nagler Type 6 Eyepiece 11mm Nagler Type 6 Eyepiece 12mm Nagler Type 4 Eyepiece 13mm Nagler Type 6 Eyepiece 16mm Nagler Type 5 Eyepiece 17mm Nagler Type 4 Eyepiece 20mm Nagler Type 5 Eyepiece 22mm Nagler Type 4 Eyepiece 26mm Nagler Type 5 Eyepiece 31mm Nagler Type 5 Eyepiece 8mm Plossl Eyepiece 11mm Plossl Eyepiece 15mm Plossl Eyepiece 20mm Plossl Eyepiece 25mm Plossl Eyepiece 32mm Plossl Eyepiece 40mm Plossl Eyepiece 55mm Plossl Eyepiece 6mm ETHOS Eyepiece 8mm ETHOS Eyepiece 13mm ETHOS Eyepiece 17mm ETHOS Eyepiece 19mm Panoptic Eyepiece 24mm Panoptic Eyepiece 27mm Panoptic Eyepiece 35mm Panoptic Eyepiece 41mm Panoptic Eyepiece 8mm-24mm Zoom Eyepiece 1.25"   -- Vixen -- 6mm NPL Eyepiece 1.25" 10mm NPL Eyepiece 1.25" 15mm NPL Eyepiece 1.25" 20mm NPL Eyepiece 1.25" 25mm NPL Eyepiece 1.25" 30mm NPL Eyepiece 1.25" 40mm NPL Eyepiece 1.25" 12mm PL Plossl Eyepiece LVW 3.5mm 1.25" Eyepiece LVW 5mm 1.25" Eyepiece LVW 8mm 1.25" Eyepiece LVW 13mm 1.25" Eyepiece LVW 17mm 1.25" Eyepiece LVW 22mm 1.25" Eyepiece LVW 42mm 1.25" Eyepiece NLV Series 2.5mm Lanthanum Eyepiece 1.25" NLV Series 4mm Lanthanum Eyepiece 1.25" NLV Series 5mm Lanthanum Eyepiece 1.25" NLV Series 6mm Lanthanum Eyepiece 1.25" NLV Series 9mm Lanthanum Eyepiece 1.25" NLV Series 10mm Lanthanum Eyepiece 1.25" NLV Series 12mm Lanthanum Eyepiece 1.25" NLV Series 15mm Lanthanum Eyepiece 1.25" NLV Series 20mm Lanthanum Eyepiece 1.25" NLV Series 25mm Lanthanum Eyepiece 1.25" NLV Series 40mm Lanthanum Eyepiece 1.25" NLV Series 50mm Lanthanum Eyepiece 1.25"   -- William Optics -- 3mm SPL Super Planetary Eyepiece 1.25" 6mm SPL Super Planetary Eyepiece 1.25" 12.5mm SPL Super Planetary Eyepiece 1.25" 4mm UWAN Wide Angle 1.25" Eyepiece 7mm UWAN Wide Angle 1.25" Eyepiece 16mm UWAN Wide Angle 1.25" Eyepiece 28mm UWAN Wide Angle 2.0" Eyepiece 9mm SWAN Eyepiece 15mm SWAN Eyepiece 20mm SWAN Eyepiece 25mm SWAN Eyepiece 33mm SWAN Eyepiece
Focal Length:	mm
Apparent Field Of View:	°

Magnification:	x
True Field Of View:	°
Exit Pupil:	mm