Full-Frame FOV: | 6.23° x 4.15° |
APS-C FOV: | 4.08° x 2.72° |
Prime Focus Magnification: | 8x |
Light Area: | 19.6cm² |
Light Gathering Power: | 51x |
Angular resolution: | 2.79" (Rayleigh) |
Angular resolution: | 2.32" (Dawes) |
Limiting magnitude: | 11.0 |
Type | Doublet Apochromat |
Aperture | 50mm |
Focal Length | 330mm |
Focal Ratio | 6.6 |
Optics | Air-spaced ED |
Draw Tube | 31.7mm (1.25") |
Focuser | CNC machined, dual speed, 360° rotation |
Weight | 1.27kg |
Accessories | dovetail |
Notes |
page 1
Full-Frame FOV: | 5.71° x 3.80° |
APS-C FOV: | 3.74° x 2.50° |
Prime Focus Magnification: | 8x |
Light Area: | 28.3cm² |
Light Gathering Power: | 73x |
Angular resolution: | 2.33" (Rayleigh) |
Angular resolution: | 1.93" (Dawes) |
Limiting magnitude: | 11.4 |
Type | Doublet Apochromat |
Aperture | 60mm |
Focal Length | 360mm |
Focal Ratio | 6.0 |
Optics | FPL-53 / lanthanum glass doublet lens. |
Draw Tube | 50.8mm (2.00") |
Focuser | Rack & pinion focuser, dual-speed, scale, 60mm travel |
Weight | 1.5kg |
Accessories | |
Notes | M54x0.75 connection thread, 2" and 1.25" receptacles, back focus 135mm from 2" receptacle, OTA length 230mm retracted |
page 2
Full-Frame FOV: | 6.23° x 4.15° |
APS-C FOV: | 4.08° x 2.72° |
Prime Focus Magnification: | 8x |
Light Area: | 28.3cm² |
Light Gathering Power: | 73x |
Angular resolution: | 2.33" (Rayleigh) |
Angular resolution: | 1.93" (Dawes) |
Limiting magnitude: | 11.4 |
Type | Doublet Apochromat |
Aperture | 60mm |
Focal Length | 330mm |
Focal Ratio | 5.5 |
Optics | FPL-53 glass, fully multi-coated |
Draw Tube | 50.8mm (2.00") |
Focuser | Rack & pinion, dual-speed, rotatable, 60mm travel |
Weight | 1.8kg |
Accessories | dovetail, carry bag |
Notes | discontinued |
page 3
Full-Frame FOV: | 5.71° x 3.80° |
APS-C FOV: | 3.74° x 2.50° |
Prime Focus Magnification: | 8x |
Light Area: | 28.3cm² |
Light Gathering Power: | 73x |
Angular resolution: | 2.33" (Rayleigh) |
Angular resolution: | 1.93" (Dawes) |
Limiting magnitude: | 11.4 |
Type | Lens |
Aperture | 60mm |
Focal Length | 360mm |
Focal Ratio | 6.0 |
Optics | Two-element ED lens |
Draw Tube | 50.8mm (2.00") |
Focuser | Push-pull tube, 66mm travel |
Weight | 1.22kg |
Accessories | dovetail, tube rings, 2-element 1x corrector |
Notes | OTA length 305mm, back focus 55mm |
page 4
Full-Frame FOV: | 5.71° x 3.80° |
APS-C FOV: | 3.74° x 2.50° |
Prime Focus Magnification: | 8x |
Light Area: | 28.3cm² |
Light Gathering Power: | 73x |
Angular resolution: | 2.33" (Rayleigh) |
Angular resolution: | 1.93" (Dawes) |
Limiting magnitude: | 11.4 |
Type | Doublet Apochromat |
Aperture | 60mm |
Focal Length | 360mm |
Focal Ratio | 6.0 |
Optics | FPL-53 / lanthanum glass doublet lens. |
Draw Tube | 50.8mm (2.00") |
Focuser | Rack & pinion focuser, dual-speed, scale, 60mm travel |
Weight | 1.5kg |
Accessories | |
Notes | M54x0.75 connection thread, 2" and 1.25" receptacles, back focus 135mm from 2" receptacle, OTA length 230mm |
page 5
Full-Frame FOV: | 6.85° x 4.56° |
APS-C FOV: | 4.49° x 3.00° |
Prime Focus Magnification: | 7x |
Light Area: | 28.3cm² |
Light Gathering Power: | 73x |
Angular resolution: | 2.33" (Rayleigh) |
Angular resolution: | 1.93" (Dawes) |
Limiting magnitude: | 11.4 |
Type | Quadruplet Apochromat |
Aperture | 60mm |
Focal Length | 300mm |
Focal Ratio | 5.0 |
Optics | 2-element FPL53 objective, 2-element corrector |
Draw Tube | 63mm (2.48") |
Focuser | Rack & pinion, 20mm travel, rotatable, tilter, dual-speed, scale |
Weight | 2kg |
Accessories | dovetail, bar/handle, finder shoe |
Notes | OTA length 270mm, 44mm image circle, back focus 41~61mm |
page 6
Full-Frame FOV: | 7.50° x 4.99° |
APS-C FOV: | 4.91° x 3.28° |
Prime Focus Magnification: | 6x |
Light Area: | 29.2cm² |
Light Gathering Power: | 76x |
Angular resolution: | 2.29" (Rayleigh) |
Angular resolution: | 1.90" (Dawes) |
Limiting magnitude: | 11.4 |
Type | Doublet Apochromat |
Aperture | 61mm |
Focal Length | 274mm |
Focal Ratio | 4.5 |
Optics | FPL-53 doublet with 3-element flattener |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, rotatable, scale, 55mm travel |
Weight | 2.25kg |
Accessories | dovetail |
Notes | FL=336mm (F5.5) w/o 0.81x flattener, Ø44mm image circle, back focus 55mm from M48 thread, OTA length 264mm retracted |
page 7
Full-Frame FOV: | 4.89° x 3.26° |
APS-C FOV: | 3.20° x 2.14° |
Prime Focus Magnification: | 10x |
Light Area: | 33.2cm² |
Light Gathering Power: | 86x |
Angular resolution: | 2.15" (Rayleigh) |
Angular resolution: | 1.78" (Dawes) |
Limiting magnitude: | 11.6 |
Type | Quadruplet Apochromat |
Aperture | 65mm |
Focal Length | 420mm |
Focal Ratio | 6.5 |
Optics | FPL-53 glass, internal ED flattener |
Draw Tube | 50.8mm (2.00") |
Focuser | Rack & pinion, dual-speed, 360° rotatable, scale, up to 3kg gear load |
Weight | 2.8kg |
Accessories | dovetail |
Notes | Image circle Ø44mm, length 340mm with retracted dew hood, discontinued |
page 8
Full-Frame FOV: | 4.89° x 3.26° |
APS-C FOV: | 3.20° x 2.14° |
Prime Focus Magnification: | 10x |
Light Area: | 38.5cm² |
Light Gathering Power: | 100x |
Angular resolution: | 2.00" (Rayleigh) |
Angular resolution: | 1.66" (Dawes) |
Limiting magnitude: | 11.7 |
Type | Doublet Apochromat |
Aperture | 70mm |
Focal Length | 420mm |
Focal Ratio | 6.0 |
Optics | 2-element with ED FPL51 |
Draw Tube | 50.8mm (2.00") |
Focuser | Crayford, dual-speed, 360° rotation |
Weight | 2.2kg |
Accessories | Mount plate with photo thread, 2" to 1.25" adapter, soft case |
Notes | No dovetail |
page 9
Full-Frame FOV: | 4.34° x 2.89° |
APS-C FOV: | 2.84° x 1.90° |
Prime Focus Magnification: | 11x |
Light Area: | 38.5cm² |
Light Gathering Power: | 100x |
Angular resolution: | 2.00" (Rayleigh) |
Angular resolution: | 1.66" (Dawes) |
Limiting magnitude: | 11.7 |
Type | Quadruplet Apochromat |
Aperture | 70mm |
Focal Length | 474mm |
Focal Ratio | 6.8 |
Optics | Lanthan Elements, fully multi-coated |
Draw Tube | 63.5mm (2.50") |
Focuser | Crayford, dual-speed, 360° rotation |
Weight | 2.5kg |
Accessories | 1.25" reducer, carrying case |
Notes | Integrated two element corrector, image circle 32mm, mounting foot for photo tripods (no dovetail)、mechanical length 310mm |
page 10
Full-Frame FOV: | 4.89° x 3.26° |
APS-C FOV: | 3.20° x 2.14° |
Prime Focus Magnification: | 10x |
Light Area: | 38.5cm² |
Light Gathering Power: | 100x |
Angular resolution: | 2.00" (Rayleigh) |
Angular resolution: | 1.66" (Dawes) |
Limiting magnitude: | 11.7 |
Type | Doublet Apochromat |
Aperture | 70mm |
Focal Length | 420mm |
Focal Ratio | 6.0 |
Optics | Multi-coated ED objective, FK61 glass element |
Draw Tube | 50.8mm (2.00") |
Focuser | Crayford, dual-speed, 360° rotation, scale |
Weight | 2.1kg |
Accessories | No dovetail, but adapter bracket for camera tripods |
Notes | 305mm transportation length, Focuser travel: 85mm |
page 11
Full-Frame FOV: | 5.87° x 3.91° |
APS-C FOV: | 3.85° x 2.57° |
Prime Focus Magnification: | 8x |
Light Area: | 38.5cm² |
Light Gathering Power: | 100x |
Angular resolution: | 2.00" (Rayleigh) |
Angular resolution: | 1.66" (Dawes) |
Limiting magnitude: | 11.7 |
Type | Quadruplet Apochromat |
Aperture | 70mm |
Focal Length | 350mm |
Focal Ratio | 5.0 |
Optics | 4-element design in two groups, triplet FPL53 lens, fluoride glass corrector |
Draw Tube | 76.2mm (3.00") |
Focuser | Rack & pinion, 30mm travel, rotatable, tilter, dual-speed, scale , 6kg load |
Weight | 3kg |
Accessories | dovetail, tube rings, finder shoe |
Notes | OTA length 325mm retracted, 44mm image circle, back focus 76mm |
page 12
Full-Frame FOV: | 4.57° x 3.04° |
APS-C FOV: | 2.99° x 2.00° |
Prime Focus Magnification: | 10x |
Light Area: | 39.6cm² |
Light Gathering Power: | 103x |
Angular resolution: | 1.97" (Rayleigh) |
Angular resolution: | 1.63" (Dawes) |
Limiting magnitude: | 11.8 |
Type | Quadruplet Apochromat |
Aperture | 71mm |
Focal Length | 450mm |
Focal Ratio | 6.3 |
Optics | FPL-53 triplet objective with corrector lens |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion with 2" and 1.25" ring clamps, scale, 360° rotatable, 55mm travel, compression ring, ~4kg load |
Weight | 3.2kg |
Accessories | dovetail, finder shoe, tube rings |
Notes | 4-element quadruplet design with Ø44mm image circle, 115mm backfocus from 2" ring clamp, tube length 365mm, identical with the Sharpstar 71SDQ. |
Status | discontinued |
page 13
Full-Frame FOV: | 4.76° x 3.17° |
APS-C FOV: | 3.12° x 2.08° |
Prime Focus Magnification: | 10x |
Light Area: | 40.7cm² |
Light Gathering Power: | 106x |
Angular resolution: | 1.94" (Rayleigh) |
Angular resolution: | 1.61" (Dawes) |
Limiting magnitude: | 11.8 |
Type | Doublet Apochromat |
Aperture | 72mm |
Focal Length | 432mm |
Focal Ratio | 6.0 |
Optics | FPL-53 and lanthanum glass elements, fully multi-coated |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed |
Weight | 2.18kg |
Accessories | dovetail |
Notes | back focus of 135 mm, tube travel: 73 mm, transport length 31 cm |
page 14
Full-Frame FOV: | 5.14° x 3.42° |
APS-C FOV: | 3.37° x 2.25° |
Prime Focus Magnification: | 9x |
Light Area: | 40.7cm² |
Light Gathering Power: | 106x |
Angular resolution: | 1.94" (Rayleigh) |
Angular resolution: | 1.61" (Dawes) |
Limiting magnitude: | 11.8 |
Type | Doublet Apochromat |
Aperture | 72mm |
Focal Length | 400mm |
Focal Ratio | 5.6 |
Optics | FPL-53 glass |
Draw Tube | 50.8mm (2.00") |
Focuser | Rack & pinion, dual speed, scale, 70mm travel, up to 4kg gear load |
Weight | 2kg |
Accessories | Tube ring with photo tripod connection |
Notes | Image circle Ø44mm, M54 thread (M54x0.75 male), length 320mm with retracted dew hood |
page 15
Full-Frame FOV: | 4.92° x 3.27° |
APS-C FOV: | 3.22° x 2.15° |
Prime Focus Magnification: | 10x |
Light Area: | 45.4cm² |
Light Gathering Power: | 118x |
Angular resolution: | 1.84" (Rayleigh) |
Angular resolution: | 1.53" (Dawes) |
Limiting magnitude: | 11.9 |
Type | Triplet Apochromat |
Aperture | 76mm |
Focal Length | 418mm |
Focal Ratio | 5.5 |
Optics | Multi-coated FPL53 APO Triplet lens |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, scale, rotatable |
Weight | 3.2kg |
Accessories | 3-element 0.82x ED flattener with 2" filter thread, dovetail, handle, finder shoe |
Notes | Length 333mm retracted, 44mm image circle, back focus 55mm from M48 thread, 1.25" and 2" interfaces |
page 16
Full-Frame FOV: | 4.28° x 2.85° |
APS-C FOV: | 2.80° x 1.87° |
Prime Focus Magnification: | 11x |
Light Area: | 50.3cm² |
Light Gathering Power: | 131x |
Angular resolution: | 1.75" (Rayleigh) |
Angular resolution: | 1.45" (Dawes) |
Limiting magnitude: | 12.0 |
Type | Triplet Apochromat |
Aperture | 80mm |
Focal Length | 480mm |
Focal Ratio | 6.0 |
Optics | FPL-53 elements, fully multi-coated |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual speed, reinforced plain bearings |
Weight | 3.14kg |
Accessories | dovetail, 1.25" adapter |
Notes | back focus 135mm from the 2" connection and 170mm from the female M63 thread |
page 17
Full-Frame FOV: | 3.67° x 2.44° |
APS-C FOV: | 2.40° x 1.61° |
Prime Focus Magnification: | 13x |
Light Area: | 50.3cm² |
Light Gathering Power: | 131x |
Angular resolution: | 1.75" (Rayleigh) |
Angular resolution: | 1.45" (Dawes) |
Limiting magnitude: | 12.0 |
Type | Doublet Apochromat |
Aperture | 80mm |
Focal Length | 560mm |
Focal Ratio | 7.0 |
Optics | FPL-51 ED element, fully multi-coated |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed |
Weight | 2.81kg |
Accessories | dovetail, reduction from 2" to 1.25" |
Notes | Back focus 123mm from 2" receptacle, 160mm from the connection thread without receptacle |
page 18
Full-Frame FOV: | 3.67° x 2.44° |
APS-C FOV: | 2.40° x 1.61° |
Prime Focus Magnification: | 13x |
Light Area: | 50.3cm² |
Light Gathering Power: | 131x |
Angular resolution: | 1.75" (Rayleigh) |
Angular resolution: | 1.45" (Dawes) |
Limiting magnitude: | 12.0 |
Type | Doublet Apochromat |
Aperture | 80mm |
Focal Length | 560mm |
Focal Ratio | 7.0 |
Optics | FPL-51, fully multi-coated |
Draw Tube | 50.8mm (2.00") |
Focuser | Crayford, dual-speed |
Weight | 3kg |
Accessories | dovetail, 1.25" reducer |
Notes |
page 19
Full-Frame FOV: | 3.78° x 2.52° |
APS-C FOV: | 2.47° x 1.65° |
Prime Focus Magnification: | 13x |
Light Area: | 50.3cm² |
Light Gathering Power: | 131x |
Angular resolution: | 1.75" (Rayleigh) |
Angular resolution: | 1.45" (Dawes) |
Limiting magnitude: | 12.0 |
Type | Quadruplet Apochromat |
Aperture | 80mm |
Focal Length | 544mm |
Focal Ratio | 6.8 |
Optics | Air-spaced FPL-53 triplet objective + 2-element field corrector |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, scale, 90mm travel |
Weight | 3.5kg |
Accessories | dovetail, 2" to 1.25" adapter |
Notes | 45mm image circle, 155mm back focus from M68 thread, 135mm from the 2" receptacle, up to 5kg focuser payload |
page 20
Full-Frame FOV: | 4.11° x 2.74° |
APS-C FOV: | 2.69° x 1.80° |
Prime Focus Magnification: | 12x |
Light Area: | 50.3cm² |
Light Gathering Power: | 131x |
Angular resolution: | 1.75" (Rayleigh) |
Angular resolution: | 1.45" (Dawes) |
Limiting magnitude: | 12.0 |
Type | Triplet Apochromat |
Aperture | 80mm |
Focal Length | 500mm |
Focal Ratio | 6.3 |
Optics | FPL-53, air-spaced |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, scale, rotatable |
Weight | 3.48kg |
Accessories | dovetail, carry case |
Notes | carbon tube, accepts Riccardi 0.75x reducer, full frame illumination |
page 21
Full-Frame FOV: | 5.84° x 3.89° |
APS-C FOV: | 3.82° x 2.55° |
Prime Focus Magnification: | 8x |
Light Area: | 50.3cm² |
Light Gathering Power: | 131x |
Angular resolution: | 1.75" (Rayleigh) |
Angular resolution: | 1.45" (Dawes) |
Limiting magnitude: | 12.0 |
Type | Quadruplet Apochromat |
Aperture | 80mm |
Focal Length | 352mm |
Focal Ratio | 4.4 |
Optics | FPL53 triplet with 3-element corrector |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, rotatable, scale |
Weight | 3.5kg |
Accessories | dovetail, M48 tilting device, 19mm M48 extension, hard aluminum case |
Notes | Tube length 380mm retracted, image circle 42mm, back focus 55mm from the 48mm thread, 74mm w/o extensions |
page 22
Full-Frame FOV: | 4.43° x 2.95° |
APS-C FOV: | 2.90° x 1.94° |
Prime Focus Magnification: | 11x |
Light Area: | 58.1cm² |
Light Gathering Power: | 151x |
Angular resolution: | 1.62" (Rayleigh) |
Angular resolution: | 1.35" (Dawes) |
Limiting magnitude: | 12.2 |
Type | Quadruplet Apochromat |
Aperture | 86mm |
Focal Length | 464mm |
Focal Ratio | 5.4 |
Optics | Special FDC-100 glass, Pezval, doublet with int. 2-element corrector |
Draw Tube | 76.2mm (3.00") |
Focuser | Rack & pinion, 40mm travel, dual-speed, scale, rotation, ~6kg gear load |
Weight | 4kg |
Accessories | dovetail, carry case |
Notes | Image circle 60mm, backfocus 55mm to 95mm (from 2" adapter), 102 mm from M82 thread, OTA length 360mm with retracted dew shield |
Status | discontinued |
page 23
Full-Frame FOV: | 3.55° x 2.36° |
APS-C FOV: | 2.32° x 1.55° |
Prime Focus Magnification: | 13x |
Light Area: | 78.5cm² |
Light Gathering Power: | 204x |
Angular resolution: | 1.40" (Rayleigh) |
Angular resolution: | 1.16" (Dawes) |
Limiting magnitude: | 12.5 |
Type | Quadruplet Apochromat |
Aperture | 100mm |
Focal Length | 580mm |
Focal Ratio | 5.8 |
Optics | FPL-53 air-spaced triplet objective, Petzval design, int flattener |
Draw Tube | 101.6mm (4.00") |
Focuser | Rack & pinion, dual-speed, scale, rotation, ~6kg gear load, 40mm travel |
Weight | 5.3kg |
Accessories | dovetail, carry case |
Notes | Image circle 49mm, backfocus 125mm to 145mm |
page 24
Full-Frame FOV: | 2.88° x 1.92° |
APS-C FOV: | 1.89° x 1.26° |
Prime Focus Magnification: | 17x |
Light Area: | 81.7cm² |
Light Gathering Power: | 212x |
Angular resolution: | 1.37" (Rayleigh) |
Angular resolution: | 1.14" (Dawes) |
Limiting magnitude: | 12.5 |
Type | Doublet Apochromat |
Aperture | 102mm |
Focal Length | 714mm |
Focal Ratio | 7.0 |
Optics | FPL-53 apo element, lanthanum element |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, 360° rotation |
Weight | 4.1kg |
Accessories | dovetail |
Notes | M63x1 thread (female) for threaded adaptions and 2" / 1.25" for pushed adaptions |
page 25
Full-Frame FOV: | 2.88° x 1.92° |
APS-C FOV: | 1.89° x 1.26° |
Prime Focus Magnification: | 17x |
Light Area: | 81.7cm² |
Light Gathering Power: | 212x |
Angular resolution: | 1.37" (Rayleigh) |
Angular resolution: | 1.14" (Dawes) |
Limiting magnitude: | 12.5 |
Type | Doublet Apochromat |
Aperture | 102mm |
Focal Length | 714mm |
Focal Ratio | 7.0 |
Optics | FPL-51 element, fully multi-coated |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed |
Weight | 3.98kg |
Accessories | dovetail, reduction to 1,25" |
Notes |
page 26
Full-Frame FOV: | 3.95° x 2.63° |
APS-C FOV: | 2.59° x 1.73° |
Prime Focus Magnification: | 12x |
Light Area: | 81.7cm² |
Light Gathering Power: | 212x |
Angular resolution: | 1.37" (Rayleigh) |
Angular resolution: | 1.14" (Dawes) |
Limiting magnitude: | 12.5 |
Type | Quadruplet Apochromat |
Aperture | 102mm |
Focal Length | 520mm |
Focal Ratio | 5.1 |
Optics | FPL-53 air-spaced triplet lens, 3-element flattener |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, scale, rotation, |
Weight | 4.5kg |
Accessories | dovetail, carry case |
Notes | Backfocus 55mm to 78mm, image circle 42mm, not suitable for star diagonals |
page 27
Full-Frame FOV: | 2.94° x 1.96° |
APS-C FOV: | 1.92° x 1.28° |
Prime Focus Magnification: | 16x |
Light Area: | 89.9cm² |
Light Gathering Power: | 234x |
Angular resolution: | 1.31" (Rayleigh) |
Angular resolution: | 1.08" (Dawes) |
Limiting magnitude: | 12.6 |
Type | Triplet Apochromat |
Aperture | 107mm |
Focal Length | 700mm |
Focal Ratio | 6.5 |
Optics | FPL-53, air-spaced, fully multi-coated |
Draw Tube | 76.2mm (3.00") |
Focuser | Rack & pinion, dual-speed, scale, rotatable, 110mm travel |
Weight | 6.5kg |
Accessories | dovetail, tube with 2x detachable segments threaded between focuser and tube, carry case |
Notes | backfocus 60mm to 230mm, connections: M78x1-M74x1-M68x1-2"-1.25", accepts 0.75x Riccardi reducer, full frame illumination |
page 28
Full-Frame FOV: | 2.67° x 1.78° |
APS-C FOV: | 1.75° x 1.17° |
Prime Focus Magnification: | 18x |
Light Area: | 95.0cm² |
Light Gathering Power: | 247x |
Angular resolution: | 1.27" (Rayleigh) |
Angular resolution: | 1.05" (Dawes) |
Limiting magnitude: | 12.7 |
Type | Doublet Apochromat |
Aperture | 110mm |
Focal Length | 770mm |
Focal Ratio | 7.0 |
Optics | 2-element ED objective |
Draw Tube | 63.5mm (2.50") |
Focuser | Crayford, dual-speed |
Weight | 6.8kg |
Accessories | dovetail |
Notes |
page 29
Full-Frame FOV: | 3.12° x 2.07° |
APS-C FOV: | 2.04° x 1.36° |
Prime Focus Magnification: | 15x |
Light Area: | 95.0cm² |
Light Gathering Power: | 247x |
Angular resolution: | 1.27" (Rayleigh) |
Angular resolution: | 1.05" (Dawes) |
Limiting magnitude: | 12.7 |
Type | Doublet APO |
Aperture | 110mm |
Focal Length | 660mm |
Focal Ratio | 6.0 |
Optics | FPL51 and Lanthanum glass 2-element APO |
Draw Tube | 68mm (2.68") |
Focuser | Rack & pinion, dual-speed, rotatable, scale |
Weight | 10kg |
Accessories | |
Notes | Back focus 40mm |
page 30
Full-Frame FOV: | 3.16° x 2.11° |
APS-C FOV: | 2.07° x 1.38° |
Prime Focus Magnification: | 15x |
Light Area: | 132.7cm² |
Light Gathering Power: | 345x |
Angular resolution: | 1.07" (Rayleigh) |
Angular resolution: | 0.89" (Dawes) |
Limiting magnitude: | 13.1 |
Type | Quadruplet Apochromat |
Aperture | 130mm |
Focal Length | 650mm |
Focal Ratio | 5.0 |
Optics | FPL-53 triple-element, air-spaced, 3-element flattener |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack & pinion, dual-speed, scale, rotation, |
Weight | 9.16kg |
Accessories | dovetail, carry case |
Notes | Backfocus 53mm to 74mm, image circle 42mm, OTA length 845mm, pho APO - no visual observing possible, M48 and M68 camera connectors |
page 31
Full-Frame FOV: | 3.43° x 2.28° |
APS-C FOV: | 2.24° x 1.50° |
Prime Focus Magnification: | 14x |
Light Area: | 176.7cm² |
Light Gathering Power: | 459x |
Angular resolution: | 0.93" (Rayleigh) |
Angular resolution: | 0.77" (Dawes) |
Limiting magnitude: | 13.4 |
Type | Newtonian (📷 optimized) |
Aperture | 150mm |
Focal Length | 600mm |
Focal Ratio | 4.0 |
Optics | Parabolic mirror, BK7, 94% reflectivity |
Draw Tube | 50.8mm (2.00") |
Focuser | UNCN2 Crayford, dual-speed |
Weight | 4kg |
Accessories | dovetail, 8x50 finder, 1.25" reducer with 2" filter thread |
Notes | Carbon fiber tube, secondary Ø70mm |
page 32
Full-Frame FOV: | 2.74° x 1.83° |
APS-C FOV: | 1.80° x 1.20° |
Prime Focus Magnification: | 17x |
Light Area: | 176.7cm² |
Light Gathering Power: | 459x |
Angular resolution: | 0.93" (Rayleigh) |
Angular resolution: | 0.77" (Dawes) |
Limiting magnitude: | 13.4 |
Type | Newtonian (📷 optimized) |
Aperture | 150mm |
Focal Length | 750mm |
Focal Ratio | 5.0 |
Optics | Parabolic mirror, BK7, 94% reflectivity |
Draw Tube | 50.8mm (2.00") |
Focuser | UNCN2 Crayford, dual-speed |
Weight | 4kg |
Accessories | dovetail, 8x50 finder, 1.25" reducer with 2" filter thread |
Notes | Carbon fiber tube, secondary Ø55mm |
page 33
Full-Frame FOV: | 2.29° x 1.52° |
APS-C FOV: | 1.50° x 1.00° |
Prime Focus Magnification: | 21x |
Light Area: | 176.7cm² |
Light Gathering Power: | 459x |
Angular resolution: | 0.93" (Rayleigh) |
Angular resolution: | 0.77" (Dawes) |
Limiting magnitude: | 13.4 |
Type | Newtonian (📷 optimized) |
Aperture | 150mm |
Focal Length | 900mm |
Focal Ratio | 6.0 |
Optics | Parabolic mirror, BK7, 94% reflectivity |
Draw Tube | 50.8mm (2.00") |
Focuser | UNCN2 Crayford, dual-speed |
Weight | 4kg |
Accessories | dovetail, 8x50 finder, 1.25" reducer with 2" filter thread |
Notes | Carbon fiber tube, secondary Ø46mm |
page 34
Full-Frame FOV: | 4.89° x 3.26° |
APS-C FOV: | 3.20° x 2.14° |
Prime Focus Magnification: | 10x |
Light Area: | 176.7cm² |
Light Gathering Power: | 459x |
Angular resolution: | 0.93" (Rayleigh) |
Angular resolution: | 0.77" (Dawes) |
Limiting magnitude: | 13.4 |
Type | Newtonian |
Aperture | 150mm |
Focal Length | 420mm |
Focal Ratio | 2.8 |
Optics | Hyperboloid, flat-field, integrated corrector |
Draw Tube | 63.5mm (2.50") |
Focuser | Rack and pinion, dual speed |
Weight | 5kg |
Accessories | Losmandy style dovetail, 1.25" adapter, transport case |
Notes | Carbon tube, image circle 45mm, secondary Ø70mm, back focus 55mm, female M63x0.75 thread, a male M48x0.75 thread |
page 35
Full-Frame FOV: | 3.43° x 2.28° |
APS-C FOV: | 2.24° x 1.50° |
Prime Focus Magnification: | 14x |
Light Area: | 186.3cm² |
Light Gathering Power: | 484x |
Angular resolution: | 0.91" (Rayleigh) |
Angular resolution: | 0.75" (Dawes) |
Limiting magnitude: | 13.4 |
Type | Newtonian (📷 optimized) |
Aperture | 154mm |
Focal Length | 600mm |
Focal Ratio | 3.9 |
Optics | Parabolic mirror, 94% reflection and protective quartz layer |
Draw Tube | 50.8mm (2.00") |
Focuser | Precise 2" MONORAIL |
Weight | 5.3kg |
Accessories | Dovetail, 2" extension tube 35mm, 8x50 finder |
Notes | 0.5 mm thin stainless steel spider |
page 36
Full-Frame FOV: | 1.50° x 1.00° |
APS-C FOV: | 0.98° x 0.66° |
Prime Focus Magnification: | 32x |
Light Area: | 186.3cm² |
Light Gathering Power: | 484x |
Angular resolution: | 0.91" (Rayleigh) |
Angular resolution: | 0.75" (Dawes) |
Limiting magnitude: | 13.4 |
Type | Ritchey-Chretien |
Aperture | 154mm |
Focal Length | 1370mm |
Focal Ratio | 8.9 |
Optics | Hyperbolic primary, quartz glass, dielectric mirror coatings |
Draw Tube | 50.8mm (2.00") |
Focuser | Crayford, dual-speed |
Weight | 5.4kg |
Accessories | Dovetail, 2 x 25mm M90 extension rings |
Notes | back focus, 159 mm from 2" connection of the focuser |
page 37
Full-Frame FOV: | 4.69° x 3.12° |
APS-C FOV: | 3.07° x 2.05° |
Prime Focus Magnification: | 10x |
Light Area: | 186.3cm² |
Light Gathering Power: | 484x |
Angular resolution: | 0.91" (Rayleigh) |
Angular resolution: | 0.75" (Dawes) |
Limiting magnitude: | 13.4 |
Type | Newton Astrograph |
Aperture | 154mm |
Focal Length | 438mm |
Focal Ratio | 2.8 |
Optics | Mirrors 94% reflectivity |
Draw Tube | 50.8mm (2.00") |
Focuser | MONORAIL 2", dual-speed |
Weight | 5.3kg |
Accessories | dovetail, 4-element ED corrector, 2" extension tube 35mm length, clamp shells, 8x50 finder scope |
Notes | Backfocus 66.8 mm from M48 thread of the corrector, suitable for DSLRs up to APS-C sensor format |
page 38
Full-Frame FOV: | 2.02° x 1.35° |
APS-C FOV: | 1.33° x 0.89° |
Prime Focus Magnification: | 24x |
Light Area: | 506.7cm² |
Light Gathering Power: | 1,317x |
Angular resolution: | 0.55" (Rayleigh) |
Angular resolution: | 0.46" (Dawes) |
Limiting magnitude: | 14.5 |
Type | Newtonian (📷 optimized) |
Aperture | 254mm |
Focal Length | 1016mm |
Focal Ratio | 4.0 |
Optics | Parabolic primary |
Draw Tube | 50.8mm (2.00") |
Focuser | Monorail, dual-speed |
Weight | 14.8kg |
Accessories | 35mm 2" expansion tube for visual, 8x50 finder |
Notes | Secondary Ø88mm, 25mm 100% illuminated image circle |
page 39
Full-Frame FOV: | 1.71° x 1.14° |
APS-C FOV: | 1.12° x 0.75° |
Prime Focus Magnification: | 28x |
Light Area: | 725.8cm² |
Light Gathering Power: | 1,886x |
Angular resolution: | 0.46" (Rayleigh) |
Angular resolution: | 0.38" (Dawes) |
Limiting magnitude: | 14.9 |
Type | Newtonian (📷 optimized) |
Aperture | 304mm |
Focal Length | 1200mm |
Focal Ratio | 3.9 |
Optics | Parabolic primary, BK7 glass, GSO Optics, quartz layer |
Draw Tube | 50.8mm (2.00") |
Focuser | Monorail, dual-speed |
Weight | 20.8kg |
Accessories | dovetail, 35mm 2" extension tube for visual, 8x50 finder |
Notes | 104mm secondary mirror |
page 40
Full-Frame FOV: | 1.69° x 1.12° |
APS-C FOV: | 1.10° x 0.74° |
Prime Focus Magnification: | 28x |
Light Area: | 730.6cm² |
Light Gathering Power: | 1,898x |
Angular resolution: | 0.46" (Rayleigh) |
Angular resolution: | 0.38" (Dawes) |
Limiting magnitude: | 14.9 |
Type | Newtonian (📷 optimized) |
Aperture | 305mm |
Focal Length | 1220mm |
Focal Ratio | 4.0 |
Optics | Parabolic primary, quartz layer |
Draw Tube | 50.8mm (2.00") |
Focuser | Monorail, dual-speed, scale |
Weight | 21kg |
Accessories | dovetail, 2" extension tube 35mm for visual, primary fan with battery holder, 8x50 finder |
Notes | Secondary Ø88mm, quartz layer, backfocus for popular eyepieces and for astrophotography |
page 41