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Home Telescopes Altair Astro Telescopes Altair 60 EDF ED Doublet Refractor Telescope
The Altair 60 EDF is our most compact refractor telescope and has many features only found in premium instruments. It has improved optics in the form of an S-FPL53 based doublet objective lens providing superior colour correction, and a lighter more compact tube, CNC Rack & Pinion focuser with a rear camera rotator and triple thumbscrews to hold your camera or diagonal firmly in place.Latest Version with S-FPL-53 ED Lens, Optical Test Report, and rear Camera Angle Adjuster (CAA).Optical quality The telescope is guaranteed to arrive in perfect collimation. Every single optical tube comes with an optical test report and AtmosFringe analysis. Optical smoothness, figuring, and overall performance is very consistent and every lens has a unique serial number linked to the glass batch and test report. Altair Astro pioneered this approach and our customers always get the best quality. All Altair refractors are checked optically and tested and guaranteed to be in collimation - this assurance is provided at no additional cost to the customer.
Latest Version with S-FPL-53 ED Lens, Optical Test Report, and rear Camera Angle Adjuster (CAA).The Altair 60 EDF is our most compact telescope and has many features only found in premium instruments. It has improved optics in the form of an S-FPL53 based doublet objective lens providing superior colour correction, and a lighter more compact tube, CNC Rack n Pinion focuser with a rear camera rotator and triple thumbscrews to hold your camera or diagonal firmly in place. All Altair refractor 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. Optical qualityThe telescope is guaranteed to arrive in perfect collimation. Every single optical tube comes with an optical test report and AtmosFringe analysis. Optical smoothness, figuring, and overall performance is very consistent and every lens has a unique serial number linked to the glass batch and test report. Altair Astro pioneered this approach and our customers always get the best quality. Imaging friendly focuserThe micro CNC machined Rack 'n Pinion focuser has full tension-adjustment to handle heavy loads, like a large eyepiece, CCD or DSLR camera. The drawtube has 75mm travel and a graduated scale in mm. This is a straightforward focuser for imaging. There are no gimmicks - just remove the course focus knob and attach a Pegasus motor focuser coupler, mount the Pegasus motor unit on a dovetail bar under the focuser, and you are ready to go. AstrophotographyThe ED Doublet design offers very good colour correction, while keeping the optical tube extremely compact. The new S-FPL53 ED Doublet lens gives better colour correction in the blue regions of the spectrum than it's previous iterations. At F6 this telescope can be used with the optional 1.0x field flattener (FLAT-60) for wide field imaging with a 41mm image circle. Optimum spacing is 54.8mm from the rear flange of the flattener to the image sensor. Unlike other models, the Altair 60 EDF has a rear camera-rotator allowing easy framing of the object in the eyepiece or camera field of view. The single tube ring allows the whole tube to rotate, and can be locked with the stainless steel thumbscrew. Loosen the thumscrew and the telescope can be dismounted from the hinged for use with Altair Guide Scope Rings. The "mounting foot" terminates in a small dovetail plate with a flat base. The base has a standard 3-in-line hole pattern allowing attachment to most mounting systems on the market or to a camera tripod using M6 or 1/4" Photo Tripod Screws. The longer Starwave 200mm Vixen-style dovetail bar is recommended for imaging with an equatorial mount. The aluminium tube achieves thermal equilibrium very quickly, and the metal construction conducts heat easily to and from the front optics (essential for imaging and dew control). Better than FPL51. When it comes to astro imaging, the 60 EDF optical design has all the performance you need in a dual imaging and visual telescope, offering better colour correction than an FPL51 based doublet telescope with the same focal length and aperture thanks to the FPL53 ED lens element. Oversized lens. The lens actually has a larger diameter than 60mm, however, to improve performance and important thermal reliability, it has been optimised to 60mm clear aperture, this is common to all high end air spaced refractors, allowing the correct mechanical stability to house the lenses securely and precisely as they should be within the cell. Another benefit of this design is the minimising of any spacers affecting the diffraction pattern, essential for serious imaging applications. A far better approach than simply stretching the parameters in order to show extra aperture in a design where optical excellence is the real goal. This improves the edge performance of the optics, and gives better "Bokeh" with an optimum focal ratio of F6.0. (350mm focal length). Performance is better than multi-element camera lenses costing many times the price, even when they are stopped down to give better star-images. Of course, being a telescope, and lacking a diaphragm/iris also improves the image. Attaching a finder scope. A finder scope or RDF (Red Dot Finder) is a very good addition, making finding objects quick and easy. If you want a more accurate optical finder, we recommend the Altair 60mm RACI or Starwave 50mm Straight-through finder scopes, which can both be used for an auto-guiding with the Altair GPCAM for long exposure imaging. Altair 50mm or 60mm finder scope or compact Red Dot Finders (RDF) can be attached to the focuser by means of two screws. You will need a mount, eyepieces and a star-diagonal to use this high quality telescope. Included in the box- 60mm F6 ED Doublet refactor optical tube with retractable dewshield.- Dual Speed 1:10 ratio 2.5" Rack 'n Pinion (Geared) Focuser with brass rack gear and tension adjustment (ideal for imaging).- Improved retractable dew shield with a tighter fitting than the V1 (tension adjustable with 3 nylon tipped grub screws).- 2" to 1.25" eyepiece adapter with brass compression rings.- Tube ring with 3 standard M6 / 1/4" inline holes enabling the telescope to be balanced more easily for imaging, or dual-mounted as a guide scope.- Push-fit lens cap and rear 1.25" dust plug.Specification- 60mm FPL53 ED Doublet Lens assembly, 360mm focal length, housed in a fully collimatable, CNC machined cell.- Full multicoatings on all optical surfaces.- Highest practical magnification 95x, Limiting magnitude 11.59.- Light grasp approx. 73x human eye.- 23cm length, dewshield retracted, 30cm extended.- approx. weight 1.5kg (including ring and rear camera-rotator).
excellant excellent service from Harrison come within 2 dayd of ordering will be using Harrison again (21/12/2019) kriss - midlands