We are making a few more of these instruments and they should be ready by the beginning of next year. Order now to reserve one of these before they are gone.
This is a very short run of our 130 mm apo triplet refractor using extra-low dispersion glass and hand figured in our shop to .95 Strehl. Using lightweight imported materials, we are able to offer these telescopes for a reduced price. A Zygo Interferometric test report is included. The difference between this telescope and our premier SVX telescope is:
1. We use ED glass on this telescope as opposed to SD glass: https://www.stellarvue.com/optical-glass-types/
2. We hand figure these objectives to .95 Strehl as measured on the Zygo interferometer. We center the correction in green. This makes these telescopes well suited for imaging since we reduce the astigmatism to levels that are significantly better than our previous (imported) EDT objectives. While we do not spend months perfecting this objective to .98 Strehl with green centering (as we do with all our SVX objectives), this is a significant improvement in optical consistency over mass-produced optics.
3. We use imported metal parts that are lighter than the cnc machined components on our SVX series. Threaded holes are metric M6X1 threads instead of 1/4-20 threads used on our cnc rings.
Optics: Stellarvue opticians figure objectives in our shop using the interferometer and a double pass autocollimater. Optics are figured to reduce aberrations and in the process they are brought up to higher than .95 Strehl as measured on the interferometer. The wavefront is then precision figured to center the optical correction in green light. This telescope with it's accurate figure is well suited for visual use and it makes an excellent imaging telescope with the addition of the SFFX-1 photographic field flattener.
Coatings: Each objective lens focuses light precisely, and the extreme broadband coatings on each surface enhance it even further. Since these coatings transmit more than 99% in the visual spectrum and above and below it, potential reflections are eliminated. Our SVA130EDT comes in a specially machined, temperature compensating steel lens cell that maintains the performance despite dropping temperatures. The cell is heavier than an aluminum cell but it does not expand or contract as much as aluminum when temperatures change.
- SVA130EDT telescope
- Light weight tube rings
- Choose one of four focusers: Stellarvue 2.5" dual speed focuser, Stellarvue 3" dual speed focuser, Feather-Touch 3" focuser or Moonlight 3.5" Nitecrawler Focuser
- 2" and 1.25" eyepiece adapters
- Finder-scope shoe
- TP010 Vixen-style mounting rail
The amount of glass we have is limited so we were only able to make a very small number of these telescopes. They are now available for as long as they last.
Optional Visual Accessories: You will need a star diagonal, eyepieces, mount, and tripod to observe with this telescope. You will find that a finder scope is helpful in locating objects. We recommend the following:
Diagonal: Optional. Please note: You can purchase our best 2" diagonal and save $50. Just select the option above and it will be supplied with the telescope for $199.
Eyepieces: Optional. We recommend our best eyepieces for this telescope: a complete set of the Stellarvue Optimus eyepieces. Save money when you select the complete set. This set comes with a large, thickly padded case that holds the Optimus set, two additional 1.25" eyepieces, a 2"-star diagonal, and two other items such as a photographic flattener and small camera. Select this option above and it will be supplied with the telescope at $100 off for $1346. Select "Add All Accessories" above and save $159. You get the case, eyepieces and 2" Quartz Star Diagonal for $1536.
Mounts: For visual use, the Celestron AVX mount with stainless tripod and go-to capability works great.
For imaging we recommend either the Losmandy GM811G, G11G or Paramount MYT. Select the mount you prefer above and save.
Optical Imaging Accessories:
Field Flattener: To image with this telescope at 910 mm f-7, use the SFFX-1 Photographic Field Flattener.
Objective Lens: Air-spaced 130 mm, 910 mm focal length (f-7) fully multi-coated apochromatic triplet. The front lens is a durable, conventional glass, the second is an extra-low dispersion glass and the third is a Lanthanum element.
Tube Assembly: All aluminum, Instrument White color, fully baffled, 5.5” diameter tube. Telescope is 29.5" long with dew shield retracted and 35" long when extended.
Dew Shield: 6 5/8" (168 mm) diameter, 9 5/8" long retracting aluminum dew shield in Instrument White with black anodized fittings.
Dimensions: OTA: 5.5" diameter, 29.5" long with dew shield retracted and 35" long when extended.
Weight: With Stellarvue 2.5" focuser, lightweight rings and rail, the SVA130EDT weighs only 19.4 pounds.
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