Baader T-2 90° Prism Star Diagonal Body w/ Carl Zeiss Spec Prism T2-01B 2456095

Description

Baader T-2 90° Prism Star Diagonal Body w/ Carl Zeiss Spec Prism T2-01B 2456095
Description
Ordering Info
USA Shipping
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1. PRODUCT DESCRIPTION
Please note that this listing is for the item shown in the first two photos ONLY. The additional items shown in photo 3 are illustrative only and are NOT included.
Precision-engineered star diagonal with Zeiss-spec prism offers minimal light scatter for high-contrast planetary views at high magnification
Baader BBHS reflective coating on reflective surface of prism for maximum reflectivity and long life; other faces of prism are multicoated for maximum transmission
Configurable with 1.25” and 2” Baader T-2 nosepieces, 1.25” eyepiece holders, and other accessories (not included with this diagonal body) to suit a wide range of telescopes and applications
Full 34mm clear aperture
Offers a compact size and short optical path where space is at a premium and short back focus is essential
Superb mechanical fit and finish
Note:
This Baader T-2 90-degree prism diagonal (with Zeiss-spec prism) consists of a diagonal body with prism ONLY and includes no nosepiece or eyepiece holder. It has standard T/T-2 threads at the input face (with female T/T-2 thread on the telescope side) and at the output face (with male T thread on the eyepiece side). This lets you add Baader Planetarium T-2 adapters and accessories to configure the diagonal to your needs.
A Fully Customizable Diagonal Body
One of the key features of this Baader T-2 diagonal – and all Baader diagonals, whether they use prisms or mirrors - is the large free aperture and the flexibility to directly adapt to almost any telescope system, without the restriction of a 1.25" barrel size which may cause vignetting in long focal length 1.25" eyepieces or when using the diagonal with a binoviewer. That is precisely why Baader offers the body of all their T-2 System diagonals without adapters. The clear aperture of this diagonal body is 34mm.
Baader Planetarium has worked hard to make the finest and most precisely-engineered prism-based star diagonals on the market today.This mid-sized and highly flexible Baader T-2 90° Zeiss-spec prism diagonal body is ideal for high-power planetary viewing or for systems where back-focus or space is limited and a full aperture 2" diagonal will not work or is not flexible enough.
The right-angle prism in this diagonal body is produced by the same factory that made these prisms for Zeiss, and it’s the identical prism that Zeiss supplied for use with their exquisite APQ telescopes. The famous Baader Planetarium 7-Layer Multi-Coatings ensure the image is bright and contrast and the oversized prism provides an oversized full clear aperture of 34mm / 1.34".
Highest Contrast and Short Optical Path Length
Like all prism-based star diagonals, it has a short optical path length. It exhibits minimal light scatter and provides high contrast images. Its reflective properties do not degrade with age. The prism is mounted in a precisely machined aluminum housing to ensure the glass remains in the correct location and orientation for maximum performance and long life.
Note:
This diagonal body uses a prism made under license for Baader by the same production facility that made this item for Zeiss and to the same exacting Zeiss specifications. This "Zeiss-spec" prism was made for Baader and it is not an actual Zeiss-branded prism.
Most prism diagonals, including the Baader T-2 diagonal with a standard prism (Baader part T2-01C or 2456005), rely on total internal reflection at a 45-degree angle within the prism to direct light to the eyepiece. This approach results in high reflectivity without the need to use a reflective coating. However, when relying on total internal reflection, the reflectivity can degrade if dew or dust gets on the surface of the diagonal hypotenuse. That’s why this T-2 diagonal with the Zeiss-spec prism employs a Baader BBHS (Broad-Band Hard Silver) coating on the hypotenuse. This hard and long-lived silver coating enhances reflectivity, even at angles other than 45 degrees, so the product has enhanced performance and long life.
This diagonal works well for observing nearly all celestial objects. But since it minimizes scattered light and wavefront error, it’s especially good for high-contrast and high-magnification planetary and double-star observation.
The smaller size of this diagonal is a great advantage with smaller fork-mounted compound telescopes where larger 1.25” and 2” diagonals cannot ‘swing through’ the fork.
Configuration Suggestions
You can configure the T-2 Zeiss-spec prism diagonal to exactly suit your viewing requirements. The input and output T/T-2 threads integrate with the full range of Baader Astro T-2 System components and other T-threaded adapters. The telescope side can be configured to fit 2" or 1.25" focusers, as well as directly onto telescopes with specific threads such as original M44 Zeiss threads, Vixen OTAs, or Russian Maks.
The eyepiece side can be configured with 1.25" eyepiece holders. Or it can be used with Baader's quick change ring #6 to mount the Mark V binoviewer to achieve the shortest possible backfocus distance between telescope and binoviewer. It’s also the perfect diagonal for the Baader / Zeiss Giant Binoviewer (it replaces the normal prism diagonal) as well as the Baader Maxbright Binoviewer. With the right accessories, this diagonal also integrates well into digital imaging applications.
The effective optical path length of the base T-2 Prism Diagonal with Zeiss Prism is 38.5mm. The diagonal weighs just 5.4 oz (153g).
NOTE:
Like mirror-based star diagonals, but unlike diagonals with an Amici prism, this diagonal gives images that are upright but left-right reversed.
Manufacturer part number: T2-01B or 2456095.
Note:
Occasionally, the product you receive might have a slightly different cosmetic appearance or labeling than what is shown. This can often change from batch to batch according to the whims of the manufacturer. However, you will always receive a brand new, original product as described above.
Description copyright: Agena AstroProducts - Reproduction without permission prohibited.
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2. ORDERING INFORMATION
Payment:
We only accept Paypal and major credit cards through Paypal.
Shipping Method:
United States Postal Service (USPS), unless otherwise specified.
Checkout:
Please pay for the item(s) within 3 days from your account on eBay or by using the link in the email you receive from eBay.
Shipping Discount:
We offer shipping discounts if you order multiple quantities/items. eBay will automatically show you the correct, discounted shipping costs when you check-out.
Combining Purchases:
You can combine shipping for items purchased from us on eBay within 3 days. Buy the items individually, and check out together for all items. eBay will combine the shipping weights and show you the discounted shipping cost. You must check out for all items together via eBay for this. We cannot combine shipping costs after you check out individually for your purchases.
Sales Tax:
8.5% sales tax added if your Ship-To address is in California.
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3. US SHIPPING
Delivery Time:
Most orders ship within 1 business day of receiving payment. First Class shipments will take 3-5 days to arrive after we ship it. Priority Mail shipments will take 2-3 days. However, these delivery times are NOT guaranteed by the USPS. Delays of up to 2 weeks can occur in about 5% of the shipments.
Tracking/Delivery Confirmation:
eBay will update you once your order ships. You can see the order status or tracking information from your eBay account at any time.
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4. INTERNATIONAL ORDERING / SHIPPING
Shipping Cost:
Click on the "Shipping and Payments" tab above and select your country to see your shipping choices and cost. If you need a shipping cost estimate for multiple items, please contact us.
Delivery Time:
1) USPS First Class International:
Delivery takes about 3-4 weeks after we ship your package.
This can frequently take 4-6 weeks or more for several countries (8 weeks for Italy, Argentina, and South Africa; 8-12 weeks for Brazil)
.
THERE IS NO TRACKING FOR FIRST CLASS SHIPMENTS. The information shown in your eBay account is just a customs form number - it is NOT a tracking number as incorrectly indicated by eBay.
Once your package ships, we can do nothing but wait until your package arrives. Please do not become impatient and contact us in 2-3 weeks if your package has not arrived. If you don't receive the package in 6 weeks, contact us and we will work with you to resolve the issue. If you don't want to take the risk of this delay, then DO NOT USE First Class mail - use Priority or Express shipping instead.
(2) USPS Priority Mail International:
Delivery takes 1 - 2 weeks after we ship your package. This can sometimes take 3-4 weeks to several countries. The USPS provides some basic tracking information for Priority shipping.
(3) USPS Express Mail International:
Delivery usually takes 5-10 business days after we ship your package. You will receive a tracking number with which you can track your shipment from USPS.com. Note: If you use this option, you must send us your phone number when you check-out or else your shipment will be delayed. This is required for international postal forms.
Again, these delivery times are NOT guaranteed by the US Postal Service. The most common reason for delays is slow customs inspection and clearance in your country, and can be very long, even for Express mail packages. Upon shipping your order, delivery delays are beyond our control, so do not leave us negative feedback or file a Paypal claim if your package is delayed. Delays are quite common but losses are very rare, so your patience/cooperation will be greatly appreciated.
Customs and Duties:
You are responsible for any duties and taxes that may be levied in your country. These are not included in the item price or shipping cost. We have no control over these charges and cannot predict what they may be or if they will be levied upon delivery. Customs policies vary widely from country to country (Some countries such as UK are strict about imposing hefty customs duties). It is your responsibility to check with your country's customs office to determine what these additional costs will be prior to bidding or buying. Customs fees are normally charged by the delivery company or your country's postal service, or collected when you pick the item up. These fees are NOT additional shipping charges.
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5. RETURN/EXCHANGE POLICY
US Orders:
Returns must be shipped back
within 30 days
. All returned items must be in brand new, resalable condition with original manufacturer’s packaging. A minimum restocking fee of 10% will be deducted if there is any evidence of use or wear, dirt, scratches, missing packaging/parts, etc. We may levy a larger restocking fee if the condition warrants it, or even refuse returns entirely if returned in heavily used/abused condition. Shipping fees are non-refundable (for items with free or discounted fixed shipping, the actual outbound S&H cost we incurred will be deducted) and you are responsible for all return shipping costs. Please contact us first before returning an item.
International Orders:
No returns/exchanges accepted unless the item we shipped is defective. Please research the product and ask us any questions BEFORE you purchase to make sure you are buying the correct item for your needs.
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