Skip to content

Welcome guest

Please login or register
Skip to product information

Vixen Telescope SD103SII Optical Tube Assembly

$2,141.99

Olivia's profile picture

- Olivia 

This is an excellent telescope which is easy to use and will connect to a computer for tracking the cosmos. .| Verified Purchase"

Main Benefits:

  • Aperture & Focal Length: Aperture: 103mm Focal Length: 795mm Focal Ratio: f/7.7
  • Mount type: Not included: Requires a separate equatorial mount for tracking celestial objects.
  • Optics: SD (Super ED) glass lens: Effectively suppresses color fringing for sharp and accurate images. Improved spacers: Reduce diffraction around star images for more beautiful astrophotography. Multi-coated lens surfaces: Increase light transmission and reduce glare for improved image quality.

Get it between -

Features

  • High-performance SD glass lens that suppresses color fringing
  • Prepared to meet a wide range of purposes from visual observation to astrophotography
  • Available for full-frame DSLR cameras/CMOS cameras, suitable for high-quality astrophotography

Description

103mm aperture SD apochromatic refractor introducing a new spacer ring for more beautiful astrophotography


It is the successor to the favorably reviewed SD103S as a photo-visual optical tube that is the SD series of apochromatic refractors. With an aperture of 103mm and a focal length of 795mm, you can use it for a wide variety of purposes, from visual observation to astrophotography. We changed the spacers used around the outer periphery of the objective lens from three pieces of foil fragment to the shape of a ring to uniform the diffraction light of star image. It has obtained you a more beautiful star image. In combination with an optional SD Flattener HD Kit and an optional SD Reducer HD Kit, it develops into a high-performance astrograph providing an image circle of 44mm suitable for a camera/CMOS camera with a full frame imaging sensor.

Improved spacers for beautiful star images 

Vixen Telescope SD103SII Optical Tube Assembly
Vixen Telescope SD103SII Optical Tube Assembly
Vixen Telescope SD103SII Optical Tube Assembly


In the former SD103S optical tube, small fragments of tin foil are set at three places evenly around the lens as spacers. The small fragments that appear inside the effective aperture of the lens as protrusion generates diffractions around the star image by the light of incidence, resulting in three breaks radially around the star image. You get the star image beautifully as the diffraction light becomes uniform by exchanging the small fragments for a ring-shaped spacer.

High-performance SD glass lens that suppresses color fringing

Vixen Telescope SD103SII Optical Tube Assembly
Vixen Telescope SD103SII Optical Tube Assembly

In the refractor that gathers light using a lens, color fringing (chromatic aberration) occurs by the difference in refractive index from different wavelengths (colors) of the light that passes through the lens. Then, an invention was extra-low dispersion glass to eliminate the chromatic aberration. This glass shows less dispersion in different wavelengths of light, and its refractive index at a particular wavelength shows a value different from that of glass for general use. The SD103SII uses an SD glass (Super ED) lens made from FPL53 glass, a material that exhibits particularly excellent optical performance among ED glass. As a result, it successfully suppresses chromatic aberration at a high level and produces star images clearly and sharply. In the SD glass lens, g-ray, C-ray, F-ray, d-ray, and e-ray all come near the 0 value. That indicates the lens is excellent because the chromatic aberration is held at an extremely low level over all the visible colors. In particular, remarkably reduced aberration of the g-ray (purple) that is short wavelength enhances star images crisply.

Prepared to meet a wide range of purposes from visual observation to astrophotography

Vixen Telescope SD103SII Optical Tube Assembly


By setting a reasonable focal length (795mm) for the objective effective aperture (103mm), you can use it for a wide range of purposes, from planetary observations to photography of nebular and star clusters. The supplied flip mirror diagonal allows you to switch the optical path with a knob to straight through or vertical orientation quickly. Two eyepieces with different magnifications are usable quickly. You readily switch between visual observing and photography by attaching a camera on one side and an eyepiece on the other. The SD103SII is equipped with a standard dovetail attachment plate and a metal carry handle. Those accessories make you easily attaching to and detaching from the mount and transporting the optial tube.

Available for full-frame DSLR cameras/CMOS cameras, suitable for high-quality astrophotography

Vixen Telescope SD103SII Optical Tube Assembly


In combination with an SD Reducer HD Kit and an SD Flattener HD Kit (both sold separately), you will be ready to take high-quality astrophotography with a full-frame DSLR camera or CMOS camera.

7x50mm Finder II with Illuminated Reticle
(Eyepiece unit detachable*)

A finder scope/guide scope for astronomical telescopes with a magnification of 7x and a 50mm aperture. It has crosshairs and a built-in dark field illumination, which can illuminate the crosshairs in red for sighting easily in a dark field of view. The brightness of the illumination is adjustable step by step for your preference. The eyepiece unit is a detachable type with a 31.7mm sleeve, and you can use the finder scope as a guide scope by exchanging the eyepiece unit for a commercially available CMOS camera** with a 31.7mm sleeve.

Vixen Telescope SD103SII Optical Tube Assembly
Vixen Telescope SD103SII Optical Tube Assembly
Vixen Telescope SD103SII Optical Tube Assembly

* Although you can insert 31.7mm eyepieces sold separately in the place of the eyepiece unit, this will not work as it does not reach focus.

** Regarding applicability with the CMOS cameras, you make sure that the distance from the 31.7mm visual back (rear end) on the scope body to the surface of an imaging sensor of a camera is about 15mm long or less.

Specs

Objective 103mm / SD apochromat, multi-coated SD(Super ED)glass lenses
Focal Length 795mm(F7.7)
Resolving Power 1.13 arc seconds, 11.8
Light gathering power 217x unaided eye
Focusing mechanism Rack-and-pinion, with lock knob
Adapter thread / Visual back 60mm and 42mm for T-ring / 50.8mm and 31.7mm push fit with flip mirror diagonal
Finder scope 7x50mm Finder II, dark field illumination, 7 degrees field of view
Accessories Tube rings, dovetail attachment plate, metal carry handle
Dimensoins / weight 115mm O.D. x 810mm long, 5.5kg (Net 3.6kg)

Warranty

Vixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type:

Vixen Electronic Parts: Limited One Year Warranty

Vixen Mechanical Parts: Limited Two Year Warranty

• Finding the perfect telescope shouldn't be expensive, so Telescopewarehouse offers a Price Match Guarantee.
• If you find a lower advertised price on the same telescope (new, in-stock, same accessories) at another authorized retailer, we'll match it!
• Just contact us with the proof and we'll adjust your price.
• Beyond price matching, we offer expert advice, free shipping, and hassle-free returns.
• Explore our selection and start your cosmic adventure with the best deal in the galaxy!

  • We ship to all locations within the United States.
  • Orders are typically processed and shipped within 1-2 business days.
  • We offer free shipping for all orders.
  • Your order will be delivered during 3-4 business days
  • No Compromises In Quality
  • 100% Satisfaction Guarantee
  • Free Shipping For Life
  • Try Completely Risk-Free Purchase

Vixen Telescope SD103SII Optical Tube Assembly

Additional Features

Prepared for astrophotography: Compatible with optional SD Flattener HD Kit and SD Reducer HD Kit for full-frame camera use.

Rack-and-pinion focuser: Provides smooth and precise focusing for both visual and astrophotographic applications.

Flip mirror diagonal: Quickly switch between visual observation and astrophotography.

7x50mm finder scope: Makes it easy to locate and center objects in the night sky.

Dovetail attachment plate: Allows easy mounting on compatible equatorial mounts.
Metal carry handle: Facilitates transport.

Vixen Telescope SD103SII Optical Tube Assembly

Capture the Universe's Splendor

Revel in the breathtaking beauty of celestial objects with unparalleled clarity and precision.

Immerse yourself in the intricate details of distant galaxies and elusive nebulae, bringing the cosmos to life before your eyes.

Vixen Telescope SD103SII Optical Tube Assembly

Embrace the Joy of Discovery

Embark on a journey of exploration, from visual observation to astrophotography, with a telescope designed to ignite your passion for the cosmos.

Connect with the universe on a personal level, experiencing the wonder of stargazing and sharing magical moments with loved ones.


6 Stellar Reasons to Buy Your Telescope From Us

FREE-SPACE-TELESCOPE

Expertly Curated Selection

american value

American Values, American Service

Communitiy

Community & Inspiration:

Specialized section

Specialized Selection

Secure Payment Options

Hassle-Free Returns & Warranty


WHAT CUSTOMERS LIKE YOU ARE SAYING

From Beginner to Moonwalker

"As a complete newbie to astronomy, I was overwhelmed by the options. Telescope Warehouse's friendly and knowledgeable staff guided me through the process, making me feel confident and excited. The free return policy gave me peace of mind, and the whole experience was smooth and hassle-free." - Ricardo Simpson., Los Angeles

From Skeptic to Starstruck

"I'm a seasoned astronomer with high standards, and Telescope Warehouse exceeded them all. Their collection of telescopes is truly impressive, meticulously curated with the discerning enthusiast in mind. My new telescope is an investment that will last a lifetime, and I owe it all to Telescope Warehouse." - Emily C., Houston

Cheering for the Stars

"I've been a telescope enthusiast for years, but buying online always felt risky. Telescope Warehouse changed everything! Their expert team helped me choose the perfect telescope for my needs, and their expertly curated stock ensured I got a top-quality instrument. Now, every night feels like a cosmic adventure thanks to Telescope Warehouse. American service at its finest!" - Sarah M., New York City


FREQUENTLY ASKED QUESTIONS

We ship only within USA. Please provide here you own shipping information, including times, prices, options etc.

All orders will be delivered during 2-5 business days.

We will send tracking information to the e-mail address associated with your order once the item has shipped. If you have not received your tracking information and it has been over 2 business day, please contact us at +1 845 -363-7517

We accept, Visa, MasterCard, Discover, and American Express but feel free to contact us for other payment options.

We will send tracking information to the e-mail address associated with your order once the item has shipped. If you have not received your tracking information and it has been over 2 business day, please contact us at (+1) 845 -363-7517

When ordering as a gift for someone, be sure to enter in your email address to receive all summary information but enter in the recipient’s name and shipping information. We will be sure to keep all prices and receipts out of the package.

If for any reason you are not completely satisfied with your purchase, within 30 days of placing your order, we will refund you for your purchase with no questions asked.

Aperture size is the diameter of the main lens or mirror in a telescope, and it is the most important factor in determining how much light the telescope can gather. More light means brighter and more detailed images. Generally, larger apertures are better, but they also tend to be more expensive and bulkier.

Magnification is important for making objects appear larger, but it does not create more detail. Aperture is more important for determining the overall quality of the image, including its brightness, resolution, and contrast. However, magnification can still be useful for getting a closer look at specific features of an object that you can already see with lower magnification.

All telescopes are affected by light pollution to some extent, but Dobsonians and reflectors are generally less affected than refractors. This is because refractors have more internal surfaces where light can bounce around and cause glare. If you live in an area with a lot of light pollution, you may want to consider a Dobsonian or reflector, or find a dark observing location.

The essential accessories for your telescope will depend on your specific needs and interests. However, some common recommendations include:
Extra eyepieces: This will allow you to change the magnification of your telescope to suit different observing conditions and objects.
A finder scope: This is a small, low-power telescope that helps you aim the main telescope at the correct area of the sky.
A collimation kit: This is used to adjust the alignment of the mirrors in a reflector telescope.
A star chart or planisphere: This will help you identify objects in the night sky.

Dobsonian telescopes are generally the easiest to set up, as they typically only require placing them on the ground and aligning the finder scope. Refractors and reflectors may require more assembly and alignment, but the process is not overly complicated. Many telescopes come with instructions and online resources can also be helpful.

You may need a few basic tools, such as a screwdriver or Allen wrench, to assemble some telescopes. However, you do not need any special knowledge to get started. There are many resources available to help you learn how to use your telescope, such as online tutorials, books, and astronomy clubs.

Here is a general guide to what you can expect to see under typical observing conditions with different telescope apertures:

50mm-70mm: You can see the phases of Venus, the moons of Jupiter, and some brighter deep sky objects like the Andromeda Galaxy and the Orion Nebula.
70mm-100mm: You can see more detail in the planets, including the rings of Saturn and the cloud bands on Jupiter. You can also see more faint deep sky objects.
100mm+: You can start to see more challenging deep sky objects, such as galaxies, nebulae, and star clusters. You can also see more detail in fainter objects like comets and asteroids.

We are often advised that you are able to see them through any small telescope, or even binoculars. But you really need a telescope with at least 40 times magnification to clearly see the detail of the rings as separate from the planet. And the bigger the telescope, the better.

For Galactic Observations: A reflecting telescope with a larger aperture (150mm-250mm) and a moderate focal length (750mm-1250mm) is ideal for capturing distant galaxies. Telescopes such as the Orion XT8 or the Celestron Advanced VX 8" offer excellent light-gathering capabilities and versatility.

Optical telescopes, for example, can see objects up to billions of light-years away, while radio telescopes can detect signals from even further distances. However, when it comes to observing the universe's earliest moments, telescopes can only see so far.

In general, a top-quality 4-inch refractor shows deep-sky objects about as well as a 5-inch reflector or catadioptric, and might even do a bit better on the planets. Most telescopes with apertures of 80 mm or less are refractors.

Refractor Telescopes: Refractors use lenses to gather and focus light, offering crisp and clear images. They are excellent for planetary observation due to their ability to provide high contrast and detailed views.

Some of the most newly detected objects may be over 13 billion light years away, as derived from a standard model of the Universe. However, a powerful new generation of telescopes, like the James Webb Space Telescope, will be needed to confirm the suspected distances of these objects.

The most important aspect of any telescope is its aperture, the diameter of its main optical component, which can be either a lens or a mirror. A scope's aperture determines both its light-gathering ability (how bright the image appears) and its resolving power (how sharp the image appears).

The telescope you want has two essentials: high-quality optics and a steady, smoothly working mount. And all other things being equal, big scopes show more and are easier to use than small ones, as we'll see below. But don't overlook portability and convenience — the best scope for you is the one you'll actually use.

With just a small or medium-sized telescope, skygazers can easily observe planets. You'll be surprised how much of our solar system you can see! And you don't need a dark sky to view all of our solar system's planets; even under city lights, Venus, Mars, Jupiter and Saturn can be easy to see with a telescope.

In summary: Refractors generally have the edge over reflectors for a quality image, both from the standpoint of lens/mirror quality and precision optical mountings, and lack of central obscurations.


Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

Your Cart

Your cart is currently empty