The SVR102T is an extremely high performance, light weight 4” f-7. (714 mm focal length) air-spaced apo triplet refractor. It comes standard with our new 2.5” Stellarvue dual speed, rack and pinion focuser with 2” and 1.25” adapters. Optional versions using either the 2.5” or 3” Feather Touch focuser are also available. This is our latest lens design featuring a certified, high Strehl objective. Dedicated photographic field flatteners make this not only the best 4” visual scope but an outstanding imaging platform as well.
The SVR102T-3FT is a special model that comes with the 3" Feather Touch focuser. 2" and 1.25" compression ring adapters are included for visual use. All other features are the same as with the standard version (SVR102T-25SV). The fully baffled, lightweight carbon fiber tube produces a telescope that is very light. The ota is 9 lbs and rings weigh an additional .8 pounds each. The focuser unthreads resulting in a tube assembly that is only 20.25” long, well within airline carry-on size limits.
The certified 101.5 mm clear aperture optic is essentially perfect and comes with our interferometric test report showing it is .95 Strehl or higher, which means you will see or image everything the atmosphere will allow. Like all Stellarvue telescopes, this instrument is triple tested, including a star test by Vic Maris. We are currently finishing the second run of these hand crafted telescopes. This particular version usually requires a pre-order as it takes time to receive the 3" Feather Touch focusers which are often delayed for 30 - 90 days. If you preorder, you will be in line to get the telescope as soon as more focusers become available.
The Stellarvue SVR102T has been designed as our best dual purpose 4” telescope for both visual and photographic use. It delivers stunning visual performance thanks to its high Strehl, fully multi-coated objective. Photographic performance with cameras is excellent with the addition of the photographic field flattener. This is among the sharpest 4” class telescopes ever offered.
Fully multi-coated apochromatic triplet objective: Using a 101.5 mm f-7 apochromatic triplet objective, with an Ohara FPL-53 center element, this telescope provides extremely high contrast and reflector-like color correction. This triple tested lens is as well corrected as any a 4" apo triplet we have offered and it comes with an interferometric report to prove it. To further enhance this high level of contrast, extreme broadband multi-coatings are used on all six air-to-glass surfaces. This boosts contrast, making the stars appear vivid and the background velvet black. These coatings transmit light above and below the visual spectrum. This is important to minimize reflections seen on ccd images.
Lightweight carbon fiber tube assembly: The thin wall carbon fiber tube looks sharp and matches the black anodized aluminum fittings giving this telescope a very high-end, classy look. The total weight of the ota with 2.5” focuser is only 8.8 pounds, making this the lightest 102 triplet we have ever made. The dew shield retracts reducing the length of the telescope when being stored. When the telescope is used, this dew shield may be extended to minimize dewing of the objective at night and to serve as a glare shade during the daytime. Since the focuser can be easily un-threaded, the telescope length can be reduced to airline carry on size. This means you can now carry your high end apo on the plane with you.
Internal tube treatment: The main tube interior is painted ultra flat black inside and is properly baffled to eliminate any tube wall reflections. Reflections in the optical path are further reduced using edge blackened objective elements. All of these methods are used to preserve the outstanding contrast of this exceptional apochromatic lens.
Dual speed, rack and pinion focusers: This telescope comes with three focuser options. All have a higher lifting capacity than Crayfords and the larger ID means the vignetting is eliminated. The ultra-smooth coarse/fine focus knobs (10:1 Ratio) and internal brake system give the user complete control when focusing and imaging. .
Aluminum hinged rings: The SVR102T comes with our American made cnc aluminum mounting rings. Each ring has five screws top and bottom. Threaded holes are 1/4-20. There is one center hole, two holes spaced 1.5" apart and two holes spaced 60 mm apart. Use the optional TP-10 rail for telescope mounts using the Vixen style rail or use the optional TP6 for mounts that use the larger Losmandy style rail.
Light gathering and magnification power: The purpose of a telescope is to gather light and magnify the apparent size of the object being viewed. A 4” refractor gathers 213 times the amount of light of the naked eye. This will reveal faint objects in space. Magnification power (the increase in relative size of the object being viewed) is dependent upon the eyepiece being used. Different eyepieces provide different magnification powers. Since this telescope uses a highly accurate, hand figured objective lens and is triple tested in the USA, these telescopes are free of coma and astigmatism seen in many import telescopes. This provides sharper details when viewing at higher powers. Dawes limit, which is the stated maximum power for telescopes under good conditions is about 250 power for a 4” telescope. But don't be surprised when you exceed this power on a steady night. This is a true apo triplet capable of very high power when conditions permit. Check the Recommended Accessories section to make the best choice for eyepieces.
Two year warranty and Stellarvue Service: Stellarvue telescopes and accessories are covered by a two year warranty. But it does not stop there. Since we are a telescope maker, we can repair your telescope for a nominal fee years after it goes out of warranty should you accidentally drop it. Buy a Stellarvue with confidence. Our customer care is legendary.