1.25" 1.6X Extender-Q for Takahashi refractors

by Takahashi Print

What would you like to print?
(Reviews and Documents/Videos will not be printed)

Basic Product Information
Full Description
Tech Details
Supplied Accessories
Recommended Accessories

More product information
The 1.25” Extender-Q is a visual and photographic amplification device designed for use with older Takahashi FSQ-106N and Sky 90 refractors. It changes the FSQ-106N from a 530mm f/5 to an 850mm f/8 and provides a 44mm image circle with a 3° field. The Sky 90 changes from a 500mm f/5.6 to an 800mm f/9. However, tests have shown that the Extender-Q will give you similar 1.6x magnification and focal ratio results with every Takahashi refractor, and not just the fast focal ratio FSQ-106 and Sky 90.

The Extender-Q threads into the Takahashi focuser drawtube before the 1.25” eyepiece adapter and so cannot be used with non-Takahashi scopes.

This extender is not a simple two-lens achromatic Barlow lens, but rather a sophisticated optical amplification device using five lenses in three groups that functions as both a visual Barlow and a photographic tele-extender. Its five-element optical system is fully multicoated for maximum light transmission and contrast. The Extender-Q produces a flat, color free, extremely high contrast image that can be used for high magnification lunar and planetary visual observation or photography and CCD imaging.

An additional advantage of the Extender-Q is that it corrects the image in the ultraviolet portion of the spectrum that is invisible to the eye, but is easily recorded by CCD cameras. Stars that radiate strongly in the ultraviolet appear closer to their naked-eye visual appearance when imaged on a CCD camera through the Extender-Q. They do not have a bloated appearance on photos due to their normally invisible UV component being recorded by the CCD camera and added to the visual image. This feature only adds to the photo/visual capabilities of Takahashi scopes.

The Extender-Q threads into the focuser drawtube, in place of the 1.25” eyepiece adapter (which is unthreaded from the focuser drawtube and reinstalled on the end of the Extender-Q). Several extension tubes in the Extender-Q body add the needed extra light path distance to allow eyepieces and a 1.25” star diagonal to focus. An optional 2” adapter #TEQ0002, shown below, threads into the end of the Extender-Q in place of the 1.25” adapter to let you use a 2” star diagonal and 2” eyepieces with the Extender-Q.

The maximum length of the Extender-Q (5.5”) is only used for photography and straight-through visual observing. With a star diagonal, two of the extender tubes in the Extender-Q body are removed, shortening the Extender-Q length to 3”. Rubber grip rings on each section make it easy to assemble and disassemble the unit.

Number of optical elements:
Barrel Size:
The industry standard diameter, as of 2011, is 1.25" and is the most common.  Other sizes available are .965" and 2".
The weight of this product.
13 oz.
5 years
There are currently no Cloudy Nights reviews associated with this product

User Ratings/Reviews from our Customers (www.astronomics.com)
Overall Product Rating: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics(0.00)   # of Ratings: 0   (Only registered customers can rate)

Visual Accessories
Barlow Lenses (1)
2" Diagonal adapter for 1.25" Extender-Q
by Takahashi
This product does not have supplied accessories... or supplied accessories have not been assigned.
No documents have been associated with this product.
No videos have been associated with this product.
There are currently no formulas associated with this product
Takahashi - 1.25" 1.6X Extender-Q for Takahashi refractors

Click icon(s) below & hover image above for zoom

Takahashi - 1.25" 1.6X Extender-Q for Takahashi refractors
   · No ratings/reviews   Only registered users can submit ratings - Register Here
Our Product #: XTND-Q
Manufacturer Product #: TEQ0001
Price: $530.00  FREE ground shipping - Click for more info
Congratulations. Your order qualifies for free ground shipping within the 48 contiguous United States.

 E-mail this product to a friend E-mail this product to a friend

Your Email:  
Your Friend's Email:  
Confirm Friend's Email:  

  200 characters or less

An email containing a link to this product has been sent to the email address you provided.

Clear Skies!

 Have a question? Do you have a question about this product?
 Found a better price? Found a lower price? Click to let us know... or call 800-422-7876 before you buy.

If you’ve found a lower delivered price on this product, let us know about it below. We’ll do our best to meet or beat that price and will get back to you within one business day with our best offer. Thanks for giving us the opportunity to give you a better deal.

Your Name:  
From Who:  
Context:  Magazine AdOnline
Website Address:  
Cut and paste the web address into the box above
Your Email:  
Confirm Email:  

We’ll do our best to meet or beat that price and will get back to you within one business day with our best offer. Thanks for giving us the opportunity to give you a better deal.

Clear skies,

This dual purpose Takahashi optical system is both a 2” 1.6x Barlow and a field flattening photographic tele-extender designed for use with Takahashi FSQ-106/Sky 90 refractors . . .

. . . our 38th year