Telescopes Canada

Baader 2" Solar-Telecompressor 0.4X for Solar Spectrum Filters, 2" SD-threads - 2459260

Zoom the image with the mouse

Baader 2" Solar-Telecompressor 0.4X for Solar Spectrum Filters, 2" SD-threads - 2459260

Availability On Back Order - Ask Us For Details or

Enter Your Email Below to be Notified When In Stock

Product Type Accessory

Vendor Baader Planetarium

Product ID 2459260

$501

We will price-match Canadian astronomy dealer pricing

Ask a Question About This Product

Highlights

Alike the TZ-3 telecentric, also the RG 0.4x Telecompressor features 46mm clear aperture throughout, perfectly suitable even for large SolarSpectrum RG46 Research Grade H-alpha Filters
Working distance: 74mm (Distance to the camera sensor), optimized for videography and full solar disc imaging. Ø 16 mm corrected image field in conjunction with the TZ-3
mounts straight onto the body of the SolarSpectrum filter and reduces f/30 f/ratio back to f/10, thanks to the factor of 0.4
2" male threads on both sides, fitting the SolarSpectrum Universal Flange Adapter #2958240 (included as standard on both sides of the SolarSpectrum H-alpha filters)
The RG 0.4x Telecompressor serves to adjust the focal length in order to improve poor seeing conditions and / or to enlarge the field of view for photographic- or lucky imaging applications

Suitable for all SolarSpectrum H-alpha Filters - with 2" male threads on both sides

Possible adaptations consisting of Baader T-Adapter, Zeiss T-2 changer system, T-2 Prism and Baader Eudiascopic eyepiece f = 30 mm

Solar Spectrum H-alpha filters require parallel light with a ray path of at least f/30. This is achieved by a focal length with our telecentric systems (and possibly also by dimming the lens with the iris). Because of the focal length extension in many telescopes the sun is not completely visually apparent when using eyepieces with f = 30 to 35 mm.

Note: both Baader Solar Spectrum Telecompressors are mounted straight onto the Solar Spectrum body rear end and reduce the f/30 ratio by a factor of 0.4x (#2459260) respectively 0.7x (#2459259). As a result, a much larger portion of the solar surface comes into view, depending on the size of the Etalon mounted inside the Solar Spectrum filter.

A telecompressor is used to adjust the focal length to possibly poor seeing conditions and / or enlarging the field for photographic- or webcam applications.

To attach the telecompressor use our 2″ Universal flange (# 295 8240); it gets attached with four screws directly onto the filter housing (see illustration), the telecompressor is mounted directly into the 2″ thread of the universal flange. The main thread of the compressor also is a 2″ male thread. This can be changed if necessary with parts from our T-2 accessories system either to a T-2 internal or external thread.

Application examples of the 0.7x Telecompressor:

The picture shows one possible combination, consisting of Baader T-Adapter (BTA # 240 8160 Part 21), Zeiss T-2 exchange system consisting of changer and change ring (# 245 6321 Part 6 and Part 7), one of our T-2 prisms and a Baader Eudiascopic eyepiece f = 30 mm.

The astro-images show the effectivness and the enlarging of the field of view with the 0.7x solar spectrum telecompressor on a 6 “refractor at f = 2250mm, dimmed down to 75mm, thus at f/30. The comparisons show the operation of the SolarSpectrum telecompressor. Primary focal length of the photographing lens is 2250 mm, reduced to 1700mm telephoto compressor The advantages: significantly larger field of view and reduce of the necessary exposure times!

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Typographical Errors and Order Cancellations

Telescopes Canada reserves the right to cancel an order due to an error in pricing by Telescopes Canada or one of our suppliers, equipment being no longer obtainable, or other events which are out of our control.