Celestron Ultima 100ED vs Celestron Regal 100 F-ED

[Giorgi]

Ultima 100ED
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Aperture (mm) - 100 mm (3.94 in)
Focal Length (mm) - 540 mm (21 in)
Focal Ratio - 5.4
Angle - 45 °
Eyepiece 1 - 8-24 Zoom
Magnification 1 - 22-66x
Finderscope - Sighting tube
Other Equipment - Tripod Balancing Platform
Carrying Case - Soft Case
Highest Useful Magnification - 236 x
Lowest Useful Magnification - 14 x
Limiting Stellar Magnitude - 12.5
Resolution (Rayleigh) - 1.39 arc seconds
Resolution (Dawes) - 1.16 arc seconds
Light Gathering Power (Compared to human eye) - 204 x
Angular Field of View - 1.8° - 1°
Linear Field of View (@1000 yds) - 95ft @ 22x 53ft @ 66x
Eye Relief - 18 mm @ 22x
Near Focus - 33ft @ 22x
Optical Coatings - Multi-Coated
Optical Tube Length - 19 in (483 mm)
Weight (oz) - 72 oz (2041 g)
Camera Adaptable - Built-in T-thread on Eyepiece
Tripod Adaptable – Yes
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Regal 100 F-ED
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Optical Design –Refractor
Aperture (mm) - 100 mm (3.94 in)
Focal Length (mm) - 540 mm (21 in)
Focal Ratio - 5.4
Magnification 1 - 22x-67x
Highest Useful Magnification - 236 x
Lowest Useful Magnification - 14 x
Limiting Stellar Magnitude - 12.5
Resolution (Rayleigh) - 1.39 arc seconds
Resolution (Dawes) - 1.16 arc seconds
Light Gathering Power (Compared to human eye) - 204 x
Angular Field of View - 1.9°/ 0.9°
Linear Field of View (@1000 m) - 33 / 17 m (108 ft)
Linear Field of View (@1000 yds) - 100 / 50
Eye Relief (mm) - 20 mm (0.79 in)
Near Focus - 26 ft (7.92 m)
Prisms - BaK-4
Optical Tube Length - 20 in (508 mm)
Weight (oz) - 89 oz (2523 g)