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Home Telescopes Altair Astro Telescopes Altair Wave Series 130 F7 ED Triplet APO
The Altair Astro 130mm F7 ED Triplet air spaced apochromat refractor uses a 905mm focal length lens cell with Japanese FPL51 ED glass from Ohara which is specifically selected to be free of internal stresses and striae which can affect optical quality in large size refractors. All Altair refractors models are checked optically and tested and guaranteed to be in collimation - this extra level of assurance is provided at no cost to the customer.
A larger aperture premium apo with dual speed Rack & Pinion focuser, Teflon-tipped adjustable rotator, CNC machined internal knife edge baffles, and a self centering 2" adapter. Both the Planostar 1.0x and 0.79x 3" flatteners and reducers can be attached directly to the focuser, by unscrewing the rear self centering assembly. New CNC machined tube rings, CNC machined dewshield with adjustable fit, and a longer dovetail bar are included for easier balancing. An aluminium push-fit dustcap is included for the front lens.Wave Series telescopes have rapidily gained a reputation for performance well above it's price range, especially with visual observers. This is due to a special optical testing and calibration process at the final stages of production, cluminating in the production of a laser interferogram image which is delivered with every telescope.Suitable for astro imaging or visual use, this is an extremely capable telescope in all areas. The telescope is ideal for serious planetary viewing, enabling faint and subtle details to be observed in high contrast. The moon, Jupiter and Saturn are very good targets for the Wave 130. The optical tube assembly can easily be carried by the Altair Sabre, SkyWatcher or Celestron GOTO mounts (please enquire about telescope/mount packages).A rigid aluminium tube gives the correct thermal properties for any large airspaced triplet refractor, allowing the use of dew control heaters to conduct heat to the optics, and of course quick thermal equalisation and relative freedom from tube currents. This is unlike carbon fibre or other non-metal composite materials which not only get brittle with age and eventually crack, but often hinder thermal equalization because they do not conduct heat away from the optics. Two lightened CNC machined tube rings give a stable mounting platform for astro photography, and a large dewshield (with improved mechanism) delays the onset of dew and keeps dust and pollen away from the objective. Wave Series hand-made, calibrated and tested optics The 130mm Wave Series triplet APO optics are carefully finished at the final stages of production and repeatedly tested until signed off by the optician in charge of the production run. Before anti-reflection coating, the lenses are placed on a testplate to assess the deviation from the ideal design curvature and sent back for figuring until the correct curvature is achieved. During assembly, the individual lenses are assembled in the lens cell, marked and rotated and re-centred with reference from a double pass autocollimator. Many iterations are required to get the best alignment and centering combination for each lens because there are 6 glass surfaces to deal with (triplets). Each lens cell is tested each time a small change is made in rotation or centering, or re-spacing. Sometimes this can result in small dust particles between the lenses which have no effect on the performance of the telescope whatsoever (because they are at the pupil), but are inevitable during this iterative process to achieve the highest quality possible for each lens. Especially at this size, it is preferable to have a lens which has been adjusted for optimum performance instead of a lens which is cosmetically perfect but has not been assembled to a high standard. Each lens cell has a serial number, guaranteeing it's originality as a genuine modified Altair Astro optic. Lens numbers start afresh with each major change in production. Once the optimum setup is reached, the lens is signed off, and our optician records a laser interferogram image in 532nm green light, which is included with each telescope. The interferogram image is run through AtmosFRINGE software, which is powerful Interferogram Analysis software used to extract quantitative wavefront measurements from a laser interferogram. The image is a snapshot in time of the lens after assembly. Altair Astro has been performing this QC process since 2008, and no other UK company to our knowledge is capable, nor even willing to perform this level of quality control, which is the essence of the Wave Series concept. This process is labour intensive and it can take a day or more to adjust one lens to optimum, therefore Wave Series telescopes cost a little more than other scopes of similar aperture. Altair Astro 130mm F6 ED Triplet APO Features: 130mm F7 multi coated objective lens FPL51 ED Optics using top quality ED glass from Ohara Japan. Highest practical magnification 250x, light grasp of 67% more than a 102mm (4") refractor. OTA weight with rings 8kg (without the optional finder). CNC Rack & Pinion dual speed focuser with 1:10 ratio coarse and fine knobs, a Self Centering compression ring for 2" accessories. 2" to 1.25" Self-Centering eyepiece adapter Tube rings with standard M6 hole pattern A Standard Vixen-format 1.75" dovetail bar is included for visual use, though we recommend changing to the Altair TMS Vixen or Losmandy-format tube rings for imaging because they are CNC machined from a higher grade of aluminium ally and will flex less. Case * Please note: The case is sold as "packaging only" and is provided with this telescope to protect it during shipping. The product guarantee does not extend to damage of the case during shipping, nor failure of the case, catches, zips, foam, or other fittings, and you are not being charged for the case when buying a telescope. If the case has absorbed damage, it is considered to have fulfilled it's function to protect the contents (which are of course guaranteed to arrive undamaged).