APM 280/2500 APO Triplet w/ CNC LW II Tube & 3.5" Feather Touch Focuser

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APM 280/2500 APO Triplet w/ CNC LW II Tube & 3.5" Feather Touch Focuser
Item # AM-280/2500-CNC
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  • The observatory-class APM 280mm (11") f/8.9 Refractor sports triple air-spaced super ED APO optics and you won't believe the views!
  • Newly designed lightweight tube assembly that will easily handle visual and imaging equipment.
  • The APM 280/2500 is standard with a fully rotatable, zero image shift Starlight 3.5" Feather Touch Focuser.
  • Fully rotatable, with zero image shift, and comes with a 3.5" to 2" and 2" to 1.25" adapter.
  • The APM 280mm (11") f/8.9 Refractor comes complete with tube rings, a 50mm finder bracket, 80mm extension tube and rail with weights for eyepiece balancing.
  • The APM 280/2500 telescope typically arrive approximately 18-24 months after order is placed, but we suggest you contact OPT for the latest delivery times.


APM 280/2500 APO Triplet with CNC LW II Tube and 3.5" Feather Touch Focuser

The APM 280 is an observatory-class triple-air-spaced super ED APO refractor will offers the observer professional results, both optically and photographically. With this instrument you will cross new observing thresholds! See planetary details with your own two eyes that are similar to those shown on the finest CCD images, or, explore the deep regions of space and capture images that will rival those of professional instruments.

The super strong, lightweight CNC LW II tubes incorporated into the design of the APM 280/2500 refractor are manufactured in Germany of the best materials and with fine attention to details and overall mechanical quality. The dew shield slides smoothly over the optical tube assembly without scratching the paint. The tube's internal baffles are matched for a large usable photographic field.

The Starlight Instruments Feather Touch focuser included with the APM 280/2500 APO is a full 3.5". It rotates smoothly and with zero image shift. This zero shift rotation is very important when your camera has already achieved its best focus and you would like to rotate it to the best possible position. The 50mm quick release finder bracket and dovetail base are mounted on the fully rotatable focuser, allowing you to rotate your finder, just like your camera, to the best position. The Feather Touch focuser comes with large anodized knobs, an attached 3.5" to 2" adapter and a 2" to 1.25" clamp-style adapter to protect your eyepieces and diagonals from scratches.

The included tube rings in the APM 280/2500 APO package are flat on both sides and have five tapped 1/4-20 inch holes perpendicular to the tube line with one centered. The middle two hole's center to center spacing is 60mm (2.362") and the outer two hole's spacing is 3.2" (Astro-Physics standard).

APM Telescope 280/2500 APO Triplet Refractor Features

  • Quick release 50m finder bracket and retractable dew shield included.
  • Feathertouch focuser is rotatable, offers choice of two speeds, and includes an indexed drawtube and internal brake
  • Observatory-class instrument weighs 143 lbs and is suitable on a semi-portable equatorial mount and tripod or in your own dome!
  • CNC tube rings with flats on both ends.
  • 3.5 -2-1.25" eyepiece adapters with brass compression rings.
  • Triplet air-spaced Super ED APO with advanced multi-coatings.
APM Telescopes Product Number: 280/2500-CNC

Please Note: This optical tube assembly is rather front-heavy. For an additional fee, the factory will install additional weight to the rear portion of the tube, at the balancing point of your choice. If you are interested in this upgrade, please contact OPT and we will investigate your options and pricing for you. Since this telescope is custom made, the manufacturer will take any requirements you might have into account before building your telescope.
Additional Information

Additional Information

SKU AM-280/2500-CNC
Manufacturer APM
Telescope Series APM CNC LW II
Optical Design Refractor - Apochromatic
Mount Type None - Optical Tube Only
Warranty Not Supplied By Manufacturer
Telescope Focal Length 2500mm
Telescope Aperture 11"
Telescope Focal Ratio f/8.8
Tube Color or Finish Gloss White
Highest Useful Magnification Not supplied by manufacturer
Limiting Stellar Magnitude 14.5
Optical Tube Outer Diameter Not supplied by manufacturer
Finder Included None
Eyepiece(s) Included None
Length of Optical Tube Not supplied by manufacturer
Optical Tube Weight Not supplied by manufacturer
Total Telescope Weight 143 lbs.
Included Items

Included Items

  • 280mm f/8.9 Optical Tube
  • 3.5" Starlight Feather Touch Focuser
  • Set CNC Tube Rings
  • 3.5" Extension 4" Long
  • 3.5" to 2" Adapter
  • 2"/1.25" Adapter
  • 50mm finder Bracket
  • 2 Steel Rails
  • 4 Magnetic Weights for Eyepiece Balancing
  • Dust Caps
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