Meade F/8 ACF™ Optical Tubes


Award-winning Advanced Coma-Free™ (ACF™) optics.

Building on Meade’s award-winning Advanced Coma-Free™ (ACF™) optics, this optical tube employs a fast f/8 optical system with high-contrast baffling that insures crisp, pinpoint imaging to the very edge of the field. Features an internal zero image shift Crayford-style focusing system with a two-speed 7:1 reduction control that provides smooth, precise focusing at any magnification. Includes precision machined Losmandy-style dovetail rail mated to the tube with wide-stance radius blocks for rock-steady mounting, and front and rear dust covers.

The "advanced" in Advanced Coma-Free

Building from a classic RC design, Meade has created a new design with the same coma-free pinpoint star images and flatter field also reduces the astigmatism and eliminates diffractions spikes found in classical RCs. The ACF is the perfect platform for the demanding researcher and imaging enthusiast with telescopes available in apertures of 10 inches, 12 inches, 14 inches, and 16 inches.

Coma Killer

What is coma? It’s an optical aberration. Precisely defined, coma is a distortion in which the image of a star cannot be focused to a point, but takes on the shape of a comet.



Meade Ultra-High Transmission Coatings (UHTC™)

Increases total light transmission and image brightness by nearly 20% over Meade’s standard coatings. Objects such as stars, galaxies and nebulae will appear significantly brighter.







Models and Prices

ACF 10" OTA ACF 12" OTA ACF 14" OTA ACF 16" OTA
Opticstar Retail Price £2,700.00 £4,020.00 £6,199.00 £9,125.00
Product Code 1008-80-01 1208-80-01 1408-80-01 1608-80-01
Optical Design Advanced Coma-Free (ACF)
Clear Aperture 10" 12" 14" 16"
Focal Length 2,032mm 2,438mm 2,845mm 3,251mm
Focal Ratio f/8 f/8 f/8 f/8
Resolving Power
(Dawes' Limit)
0.456 arc-seconds 0.380 arc-seconds 0.326 arc-seconds 0.285 arc-seconds
Oversized Primary Mirror Yes Yes Yes Yes
Focuser Mechanism Internal Crayford-style, zero image-shift, dual speed 7:1 focuser
Dovetail Losmandy®-style with ultra stable radius blocks
Viewfinder not included
Eyepiece(s) not included
Diagonal not included
Weight 15kg (33 lbs) 19kg (41 lbs) 29kg (63 lbs) 33kg (70 lbs)
Transit weight 19kg (42.5 lbs) 26kg (58 lbs) 27kg (60 lbs) 57kg (125 lbs)

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