Telescope-Service: Antares / Sky Instruments

Telescope-Service and Antares / Sky Instruments have had a long-standing relationship for many years. The Canadian company Sky Instruments and its Antares brand stand for good quality products at reasonable prices and often resemble a nice alternative to the typical Chinese products of other brands. We can offer all products of this company. Below you will find a selection of the most popular products.

Easy Payment: We offer our customers several easy and fast payment methods. You will receive exact payment details when ordering or on request!


Speers Waler Eyepieces 1.25" barrel size 80° apparent FOV !	Speers Waler Zoom 5-8 mm focal length over 80° apparent FOV !	8x50 Finderscope - 90° angled - Illuminated erect image with 1.25" illuminated eyepiece	Focal Reducer for SCTs f/6.3 focal reducer and field flattener for Schmidt-Cassegrains

2" Focal Reducers 0.5x and 0.7x suitable for Refractors, Maksutovs, Cassegrains....

From top left to below right: SW 7.5 , SW 10 , SW 14 , SW 18 , SW 24 (discontinued)

SWLinsen.jpg (35966 Byte)

General lens layout of the Speers Waler eyepieces

Speers Waler wide angle eyepieces combine a very high contrast, light transmission and field sharpness, even on fast telescopes. Comparative tests with much more expensive eyepieces of similar field of view always give good marks to the Speers Walers.

Speers Walers are suitable for the following telescopes:
The eyepieces can be well used on Newtonian telescopes down to f/4.5. The eyepieces are suited without reservations for all common refractors, Schmidt-Cassegrains, Maksutovs, ...

Optical Properties:
With their 8-lens optical design the Speers Waler eyepieces offer a well corrected field of view of 80°. The eye relief is good and kidney-beaning is barely existent.

-- The eyepieces are fully multi-coated and have blackened lens edges
-- Each eyepiece comes with removable rubber eyeguard to keep out stray light

Applications:
Speers Waler eyepieces are very versatile. With their ultra-large field of view they are of course ideally suited for deep sky observing. Dobsonian users in particular value the large field - it means that they need to move the telescope less frequently!

But Speers Walers are also very well suited for observations of the moon and planets. Contrast and image sharpness are very good.

Prices:

Item No.	Focal Length	apparent FOV	Barrel Size	No. of Lenses	Eye Relief	Price - SEK incl. VAT
An Sw 4	4.9mm	82°	1.25"	8	13mm	1950,-
An Sw 7	7.2mm	82°	1.25"	8	15mm	1950,-
An Sw 9	9.4mm	82°	1.25"	8	17mm	1950,-
An Sw 13	13.4mm	82°	1.25"	8	18mm	1950,-
An Sw 17	17.2mm	82°	1.25"	8	19mm	1950,-

This image shows the old Speers Waler Zoom

-- the well proven optics will not be replaced or changed
-- the mechanics are improved for smoother adjustment
-- the eyepiece will get a click-stop mechanism

estimated retail price .................................. 3300,- SEK
We will gladly reserve an eyepiece for you!

Two high quality 8x50 finderscopes - available in black or white colour

The Most Important Properties

-- achromatic multi-coated 50mm objective
-- 90° angled view -- erect and correct image or erect and mirror reversed
-- illuminated reticle eyepiece

The Illuminated Reticle Eyepiece Can Also Be Used Separately In a Telescope!
You can take the eyepiece out of the finderscope and put it into the 1.25" holder of your telescope. Then you own a good quality reticle eyepiece for star alignment, centering of objects or as guiding eyepiece (either with a Barlow lens, or for short photographical focal lengths ............................ Further Information (German presentation)

Schmidt Cassegrains are among the most popular telescope types on the market. The main reason for this is their compactness and their low price due to large volume production.

Optically these telescopes are a compromise, though. The focal length is relatively long, resulting in quite long exposure times and a curved field of view. These are big disadvantages for astro-imaging. The usable field of view is small and the edges are not sharply depicted.

The solution for this problem: The four-lens "Schmidt Cassegrain Corrector".

Larger Usable Field of View .... both photographically and visually (visually only with 1.25" eyepieces)

Shorter Exposure Times .... exposure times are much shorter than without the reducer

Field Flattening Function .... Schmidt Cassegrains have a curved field. The result is that if stars in the center are properly focused the stars at the edge will not be focused. This four-lens corrector flattens the field, resulting in better image sharpness throughout the entire field.

Adaptor schematic - item numbers can be found in the price table to the right.

Specifications:

Reducing factor: 0.63x
Example: ... 2000mm focal length are changed to 1260mm, f/10 is changed to f/6.3

four lens design - fully multicoated

SC thread on both sides

Many Possible Adaptations:

We offer a large number of adaptors for the SCT corrector (see left image). For long exposures we recommend to use the Radial Guider

Prices:

Item No.	Short description	Price - SEK incl. VAT
An Red SC	0.63x Reducer with SC thread on both sides	1530,-
TS 2 - SC	2" barrel for telescope side of the reducer	260,-
TS SC - T2	T2 adaptation for camera side of the reducer	365,-
T2	T-rings for most common SLR cameras. Please specify camera type when ordering!	190,-
Radial	Celestron Radial Guider - off axis guider with SC thread on the side of the telescope and T2 thread on the side of the camera	1840,-

Examples of Use:
With their 2" filter thread the reducers fit into any 2" eyepiece with 2" filter thread.
Likewise they fit into most 2" focal adaptors with the 2" filter thread (M48x0.75)

Prices:

AN RED 0,5 ....................................... 510,- SEK
AN RED 0,7 ....................................... 510- SEK

Fitting Adaptors:

TS FA 2 ..... 2" focal adaptor with T2 camera thread
TS 2-1 .... adaptor 2" on 1.25" with filter thread