The SVX140T is a 140mm, f-6.7 apochromatic refractor made with a super low dispersion center element. We shortened the focal ratio specifically designing this telescope for imaging using our dedicated field flatteners. The performance of the SVX140T has been evaluated by Ryan Voykin of Dark Rangers Inc. Stellarvue SVX140T Review.
Optics: SVX140T-R is rated at .96 Strehl or higher as measured on our Zygo Phase Shifting Interferometer in red light. We hand figure the objective right here to minimize aberrations. Visit our SVX Optics Page to learn more about this process.
Coatings: Extreme broadband, full multi-coatings on each surface transmit more than 99.5% in the visual spectrum, as well as above and below it. The reason to extend beyond the visual spectrum has to do with imaging. CCD and CMOS detectors in cameras record beyond the visual spectrum. Broadband, full multi-coatings eliminate unwanted reflections seen on CCD images taken through telescopes that have inferior coatings.
Availability: We begin the production of all SVX objectives one year ahead of time so while it takes up to a year to perfect each objective, we usually have several lenses available when you order. This means we can generally deliver this telescope within one or two weeks depending on the availability of focusers. At the current time we have Feather Touch and Stellarvue focusers in stock. MoonLite Nitecrawler focusers only add a few weeks to the waiting period as a general rule. Call us for more specific information on delivery time estimates for the telescope and focuser you are looking for. (530) 823-7796.
What's included?
- SVX140T telescope
- CNC-machined tube rings
- Your choice between the Losmandy style TP013 or TP019, or the Vixen-Style TP012 mounting rail.
- The Stellarvue #HAN-1 handle is included.
- Three different precision focusers are offered. Each comes with 2" and 1.25" adapters.
- American made, waterproof SKB case with custom cut polyethylene foam interior that does not absorb moisture like polyurethane foam and is much more durable. This is the best foam material available for a heavy telescope.
Select the focuser you prefer: The SVX140T may be ordered with one of three different focusers. Simply select the one you prefer above. Here is a synopsis of the differences:
- The Stellarvue 3" focuser. This focuser has 4.5" of travel and 2" and 1.25" compression ring adapters. This is our brand focuser that is well known as a stable and smooth 3" focuser with a highly accurate 8 to 1 reduction that allows absolutely precise focusing. This is the same as used on our smaller aperture telescopes. Both Optec, Prima Luce and ZWO motors attach directly to this focuser allowing even more precise focusing.
- The Starlight Instruments 3.5" focuser, with 4.5" of travel and 2" and 1.25" compression ring adapters. This is an American-made focuser that is equally smooth to the focuser above but is larger. Both Optec and Starlight Instruments make motors for these focusers.
- The Moonlight Nightcrawler 3.5" focuser with various extension tubes and 2" and 1.25" adapters. This is an advanced, electronic, computerized focuser preferred by dedicated imagers. It is the most expensive upgrade, but for those who want perfection when it comes to imaging, this is considered one of the best. The downside is a very short focuser draw tube length which is great for imaging stability but requires various extensions when converting to visual use. Since most high-end imagers rarely or never look through their instrument, this is usually no big deal.
*Please note that the default color for the Nitecrawler will be RED unless specified otherwise. For a full list of available color options visit www.focuser.com.
The larger aperture of all of these focusers significantly reduces vignetting seen in smaller focusers when imaging.
The Stellarvue 3" focuser weighs 3.12 lbs, the Feather Touch 3.5" focuser weighs 5.8 lbs, and the Moonlight Nitecrawler 3.5" focuser (WR35) weighs 8 lbs.
We include American-made CNC mounting rings, a retracting dew shield, metal dust cap.
Optional Accessories:
Case: We now offer an American-made, waterproof hardcase with durable custom cut foam lining to protect your instrument against damage and the elements.
Mounts: For strictly visual use, we are developing a heavy-duty alt-azimuth mount that will hold the SVX140T with great stability. We expect to offer it later this year.
For imaging we recommend:
Losmandy G11G or
Paramount MYT. This is a great choice for accurate long-exposure imaging.
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:
Finder Scope: Optional. We recommend the F050W2 finder scope. The proper ring system for this finder is the R050DA ring system.
Diagonal: Optional. Please note: You can purchase our best 2" diagonal above and save $50.
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 at the top of the page. 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.
Optional Photographic Field Flatteners
Photographic Field Flattener: To image with this telescope use the SFFX-3 photographic Field Flattener. Prior to the development of these our generic flatteners varied in specification. We highly recommend these flatteners to convert your telescope into a large imaging platform.
Photographic Focal Reducer/Field Flattener: This photographic field flattener and reducer is made exclusively by Stellarvue. It is designed as a full-frame, dedicated reducer/flattener specifically for our SVX130T and SVX140T apo triplet refractors.
It reduces the f-ratio on the SVX140T from f-6.7 to f-5.4 reducing its focal length to 750 mm. As with all Stellarvue-designed photographic flatteners, these units have a very long back focus to accommodate using a variety of additional accessories. Stellarvue will match the camera thread and back focus of your imaging train as long as your camera thread is one of these: M42, M48, M-54, M-68, 2.156"-24, 3"-24.
Unlike former import reducer/flatteners we sold with a single extra low dispersion element, this unit uses two very low-dispersion, fluoro-phosphate glasses. All elements are fully-multicoated with broadband coatings designed for astro-imaging. The unit is large and designed to work with 3.5" focusers including Stellarvue telescopes sold with a 3.5" Feather Touch or the 3.5" Moonlight focuser.
SPECIFICATIONS:
Objective Lens:
Air-spaced, hand-figured 140 mm, 938 mm focal length (f-6.7) fully multi-coated, apochromatic triplet using a combination of extra low-dispersion and Lanthanum elements. Lens is mounted in an adjustable steel cell. Test report included.
Tube Assembly:
All aluminum, Instrument White, fully baffled.
Dew Shield:
7.33" diameter retracting aluminum dew shield in Instrument White with black anodized fittings.
Dimensions:
OTA: 6 1/8" diameter, 31" long with dew shield retracted and 36" long when extended.
Weight:
Telescope tube weighs 22 pounds. Rings weight 1.2 pounds each. Slightly heavier with the Moonlight focuser option.
Rings:
Very heavy-duty CNC mounting rings made using 6061 T6 aluminum plate. Five threaded 1/4-20 holes top and bottom spaced 1.5" and 60 mm apart with one in the center. 5 mm side hole for mounting a red dot or MRF finder.
Rail: Your choice between the Losmandy style TP013A or TP019, or the Vixen-Style TP012 mounting rail.
Handle: The Stellarvue #HAN-1 handle is included.
Case:
Included with this telescope, is our American-made, waterproof SKB hard case. We combine this case with a custom, durable polyethylene foam that does not absorb moisture or easily tear, as does softer and less durable polyurethane.
Star Diagonal:
Optional. Please note: You can purchase our 2" quartz dielectric diagonal upgrade for only $199 by selecting it at the top of the page. The upgrade diagonal is the same as the D1040Q deluxe dielectric diagonal, except it does not come with a 1.25" adapter since the telescope already comes with one.
Light Gain:
400 X! (human eye = 1)
Contrast & Color Correction (1-10): 10
Click here for our online operator's manual: SVX140T Manual
