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Meade 16" f/8 ACF Optical Tube Assembly

B&H # MEF8ACF16 Mfr # 1608-80-00
No Longer Available

The Meade Instruments 16" f/8 ACF Optical Tube Assembly (OTA) features a 16” aperture, f/8 optical system with Meade’s Advanced Coma Free (ACF) optics and high-contrast baffling that ensures crisp, pinpoint imaging to the very edge of the field. The OTA features an internal zero image shift 3” Crayford-style 10:1 focusing system with a 2-speed, 7:1 reduction control that rigidly holds the OTA’s primary mirror, eliminating the need for a mirror lock, and provides smooth, precise focusing. The OTA has a focal length of 3,251mm.

The OTA includes a Meade Series 5000 HD60 25mm eyepiece and a 2” Series 5000 enhanced 99% reflectivity diagonal. It also comes with an 8 x 50mm refractor viewfinder with quick-release mounting bracket. An optional 2” diameter, 3-element f/5 focal reducer/field flattener (sold separately) lets you gain even wider, flatter fields with faster exposures, even on larger sensors.

The OTA comes with a precision-machined Losmandy-style dovetail rail mated to the tube with wide-stance radius blocks for steady mounting and front and rear dust covers.

OTA with 16" clear aperture, f/8 optical system, and Meade's ACF optics
High-contrast baffling ensures crisp, pinpoint imaging to the very edge of the field
Internal zero image shift Crayford-style focusing system with a 2-speed, 7:1 reduction control
3,251mm focal length
Low-expansion borosilicate glass primary mirror
Secondary Mirror: Low-expansion borosilicate glass that is individually figured with the primary mirror for minimum correction
Correcting Plate/Lens: Aspheric high-spectral transmission Borofloat glass from Schott AG Germany
Meade Series 5000 HD60 25mm eyepiece
Series 5000 2" diagonal with enhanced 99% reflectivity
1.25" adapter that holds the eyepiece upright for easy viewing, and provides for comfortable right-angle viewing
Viewfinder: 8 x 50mm refractor
Precision-machined Losmandy-style dovetail rail mated to the tube with wide-stance radius blocks
Optical Design Advanced Coma-Free
Clear Aperture 16"
Focal Length 3,251 mm
Focal Ratio f/8
Optical Coatings UHTC
Resolving Power Dawes Limit: 0.46 arcseconds
Viewfinder 8 x 50 mm refractor with cross hairs
Eyepiece HD-60 25 mm long eye relief eyepiece
Diagonal Series 5000 2" with enhanced 99% reflectivity
Back Focus Distance Optimal: 3.5" (88.9 mm) at f/5
Focus System Internal Crayford-style, zero image-shift primary mirror focus with dual speed 7:1 control
Mounting OTA: Losmandy-style mounting plate
Material Optical Tube: Aluminum
Dimensions (LxDiameter) 32.0 x 17.5" (81.2 x 44.4 cm)
Weight 90.0 lb (40.8 kg)
Meade 16" f/8 ACF Optical Tube Assembly
  • Meade Series 5000 HD60 25mm Eyepiece
  • Series 5000 2" Diagonal
  • 1.25" Adapter
  • 8 x 50mm Viewfinder
  • Limited 1-Year Warranty
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