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Stellarvue

Stellarvue 80 mm Apochromatic Triplet with Feather Touch focuser

$1,595.00

Stellarvue 80 mm Apochromatic Triplet with Feather Touch focuser

$1,595.00
SKU:
SV80ST-25FT
Shipping:
Free Shipping
Quantity:
This product is available for pre-order only
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Product Description

NOTE: This telescope is currently waitlisted but wait times are now relatively short. Telescopes are now assembled and tested but we are awaiting the arrival of backordered Feather Touch focusers. We maintain a running order of about two dozen of each focuser from Starlight Instruments and they are catching up. They are delivering focusers regularly now so if you want this version of the telescope, preorder now and you will be placed in line to get one soon. Your telescope will be completed when the focuser arrives. We do have the other version of this telescope in stock since it uses our own 2.5" dual speed focuser. But if you prefer the Feather Touch, order now. The sooner you pre-order, the sooner you will receive your telescope. 

This is the Stellarvue 80 mm f-6 apo triplet made using the 2.5" Feather Touch focuser. It uses the sharpest and highest contrast 80 mm apochromatic triplet lens we have ever offered. The focuser is threaded for photographic field flatteners sold below and has 1 1/4” and 2” compression ring visual adapters. This telescope also comes with heavy duty dual rings and a C19 heavy duty travel case.

Additional Info

The Stellarvue SV80ST features an 80 mm f-6 (480 mm focal length) fully multi-coated, 3 element objective lens with an Ohara FPL-53 center element.

zygo-testing-80st-lensesStellarvue Zygo Test Report

 

 

 

 

 

 

 

 

Fully multicoated apo triplet objective: The high Strehl, apochromatic triplet objective is triple tested at Stellarvue to ensure that it performs perfectly. Lenses are better than .95 Strehl, the same as our former Russian made Lomo lenses. We are now taking the time to provide interferometric test reports with each of our triplet refractors showing how the lens in your telescope actually performs. Hitting a Strehl ratio of .95 means your telescope will perform perfectly.

Each lens focuses light precisely and in addition the extreme broadband coatings on each surface enhance it even further. Using it visually, the stars appear vivid and the background, velvet black. Since these coatings transmit more than 99% in the visual spectrum and far above and below it, reflections seen on ccd images are eliminated. The relatively fast speed and high strehl optics make the 80 apo an excellent wide field imaging telescope while the visual performance is simply stunning.

Tube and dew shield: The standard model (SV80ST2-25FT) comes with an aluminum tube and dew shield that is finished in Stardust White. Fittings are black  anodized aluminum. The dew shield retracts reducing the length of the telescope when being stored. Extending the dew-shield minimizes dewing of the objective at night and serves as a glare shade during the daytime.

Internal tube treatment:  The inside of the main tube assembly is painted "ultra flat black" and is baffled to eliminate tube wall reflections.

Difference between aluminum and carbon fiber tubes: The aluminum tube of the SV80ST cools down faster than a carbon fiber tube and it can be machined more precisely. This is important in such a short, high end apo triplet.

2.5" Feather Touch focuser: This model comes with the Feather Touch 2.5" focuser with 2" and 1.25" compression ring visual adapters. 

Mounting Rings: The SV80ST2 comes with beefy, aluminum, dual hinged rings. Astro-photographers prefer individual hinged rings since they can be widely separated which eliminates flexure. 

Supplied accessories: Telescope comes with mounting rings, 2.5” focuser, 2” and 1.25” adapter, caps and case. In addition to the supplied accessories, you will need a star diagonal or erecting prismeyepiece(s) and a mount. You may also want to purchase a reflex or optical finder scope

Light gathering and magnification power: The purpose of a telescope is  to gather light and magnify the apparent size of the object being viewed. An 80 mm telescope gathers 131 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 our 80 apo 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 states that the maximum power for telescopes of this size is about 186 power for a 80 mm telescope, under good conditions but it is well known that highly accurate apo triplet refractors can exceed Dawes limit. The real limit to you observing will be the atmosphere and the amount of light you will need to properly illuminate the field. 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.

 

Specifications:

Product Specifications:  SV80ST2-25SV 80mm Apochromatic Triplet

 

Description

Objective

80mm diameter, 480mm focal length (f6), apochromatic triplet with Ohara FPL-53 center element

Tube Assembly

Machined aluminum tube - instrument white outside, ultra flat black inside

Dimensions

The main tube is 90 mm in diameter. The complete telescope is 18 3/4” long with dew shield extended and 16” long when retracted.

Weight

The optical tube assembly weighs about 5.8 lbs. The dual rings weigh about 1.2 pounds total.

Dewshield

3.94" diameter fully retracting dewshield with cap

Focuser

2 1/2” dual speed Feather Touch rack and pinion focuser threaded for field flatteners, with 2" and 1 1/4” compression ring adapters. 

Finder

Optional

Rings

Stellarvue R90SET precision hinged rings. Each ring has five 1/4-20 holes top and bottom with one in the center and two spaced 1.5” and 60mm apart.

Plate/Rail

Optional

Case

C19 Heavy Duty airline carry-on case

Diagonal

Optional

Field Flattener

Optional

Light Gain

131x (human eye = 1)

Theoretical Resolution

1.5 arc sec (Dawes Limit)

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