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APM/TS 107mm f/6.5 Super-Apo - 3" focuser

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With my Business Partner TS our high quality 107 mm triplet SD Apo comes now in a new configuration , in a light weight dual tube mode for universal use of any accessorie.


APM/TS 107mm f/6.5 Super-Apo - 3" CNC dual speed focuser / modular carbon tube
... three-element 107.2 mm f/6.5 FPL53 lens
... modular carbon fibre tube for optimized focus positions
... every single Apo is being tested on our optical bench before shipping

A three-element apochromatic refractor for astro imaging and visual observation in latest design and a proven lens with 107.3 mm aperture and 700 mm focal length. The carbon tube has three threaded segments; the two rear ones can be screwed off. So one can realize three focus positions e.g. for all kinds of reducer/correctors or binoviewers (without glass path corrector). With its weight of only 5.6 kgs, this telescope is suitable even for smaller mounts.

Quality: It features an Ohara FPL53 element for lowest color fringing and for maximum transmission and contrast, it has one of the best fully multi coatings available. Of course it is fully adjustable.


A large 3" CNC machined focuser, offers mechanical stability superior to most other focusers produced in far east. It holds even heavy cameras and accessories and offers threads for many common corrector/reducer lenses.

The modular carbon tube: a true innovation

Many advantages in one system. You can screw off the two rear segments and you get three focus positions behind the focuser. So the focuser can always be in an optimal position of best stiffness.

-- Shortest positon: Suitable for the 0.75x Riccardi reducer RIRED-M82 and for binoviewers (without glass path corrector)
-- Middle position: Suitable for the TS 2.5" flattener
-- Longest position: For visual observation with 2" diagonals

The connection threads are made of metal; a carbon thread would wear out quickly. The tube interior is laid out with black velours for best reflection suppression.


Photographical use: two focal lengths for astro imaging!

Depicted with the optional TS 2.5" flattener

525mm focal length / f/4.9 with RICCARDI Reducer: Illuminates even full size sensors up to 42 mm diameter. The reducer is threaded directly to the M82 thread of the focuser. Both tube segments must be removed. From the female M82 thread, the recommended distance to the sensor is 78.3 mm.

700mm focal length / f/6.5 with 2.5" TS flattener: Illuminates even full size sensors. No adapters are needed, the flattener fits directly into the focuser. One tube segment has to be screwed off. From the female M69 thread, the recommended distance to the sensor is 99 mm.

The fotographical 3" focuser:
It allows payloads up to approx. 6kgs.

Camera / eyepiece side adaptations:
-- M82x1 fem. thread , M68x1 fem. thread, M78 male thread , 2" eyepieces, 1.25" eyepieces
-- Focus range: 110mm
-- 360? rotation
-- 1:10 dual speed transmission

Technical details:
-- 3-element air spaced Apo, FMC
-- FPL53 element
-- Aperture: 107mm
-- Focal length: 700mm
-- Photographic speed: f/6.5
-- Telecope weight incl. CNC tube rings: 5.6 kgs
-- Transport tube length: 645 mm
-- Segment lengths: 2x 59mm
-- Dew cap diameter: 150mm
-- Carbon tube diameter: 113mm


Scope of delivery:

-- FPL53 Triplet Apo 107/700mm with carbon fibre tube
-- 2 tube modules for individual focus positions
-- 3" CNC focuser
-- 2" and 1.25" reducer
-- Finder shoe (Vixen standard)
-- CNC tube rings, Vixen GP style dovetail rail, handle
-- Transport case



International shipping : US $ 150.00 , include insurance

Delivery time : from Stock

Markus Ludes
APM-Telescopes/Germany