Baader AstroSolar Filter for Binoculars / Camera Lens - 50mm Aperture # ASBF-50

Description

Baader AstroSolar Filter for Binoculars / Camera Lens - 50mm Aperture # ASBF-50
Description
Ordering Info
USA Shipping
International Orders
Returns
Our eBay Store
1. PRODUCT DESCRIPTION
Important Note: For safety reasons, we cannot accept returns of this item once the sealed filter box has been opened. Please measure your optical instrument's tube diameter accurately BEFORE ordering a filter to make sure that you order the correct size.
Baader # ASBF-50 AstroSolar solar filter for binoculars and camera lenses
50mm filter aperture
Includes mounting accessories (centering bolts, sliding washers, fasteners, and safety straps)
Filter can be attached to items with an outside diameter (not aperture) of 55 - 70mm (2.17 - 2.76")
Sold individually; you will need to buy two filters for binocular use
AS
B
F – Baader Solar Filters for Binoculars and Camera Lenses
Baader's ASBF line of solar filters permit safe visual observation with all types of binoculars or safe solar photography with all camera lenses. The ASBF filters are similar to the ASSF line of filters (for spotting scopes) except that the mounting cell is flat or cut on one side (see photos). This allows you to:
Use two filters in close proximity to each other on the two objectives of binoculars even for small inter-pupillary (IPD) distances
Rest a filter mounted on a camera lens on a flat surface without stressing the filter cell or the film, or
Mount a filter onto a finder close to the main telescope tube.
ASBF-50 Solar Filter Specifications
Item number: ASBF-50 or 2459325
AstroSolar film aperture: 50mm (1.97")
Outside diameter clamping range (with included 13mm bolts): 55 - 70mm (2.17 - 2.76")
Inside diameter clamping range (with included 13mm bolts): 81 - 96mm (3.19 - 3.78"). See additional info below.
Suited for aperture range: 40 - 60mm (1.57 - 2.36")
Outside diameter of filter cell: 110mm (4.33")
Weight: 2.4oz / 68g
Additional Filter Details and Features
Made of original Baader AstroSolar Safety Visual Film (ND 5.0), cell mounted, and quality inspected by skilled members of Baader's staff.
The AstroSolar filter material is mounted onto a plastic ring where the plastic ring itself works as stabilizing element for the filter cell. This still plastic ring is mounted onto the aluminum front frame. The thermal expansion coefficient of the plastic and the film are similar.
Clear white IR-rejecting front ring with reinforcing raised edges along the outer and inner circumference, designed to protect the solar filter material from contact with any sharp metal edge.
Includes 3 injection molded centering-bolts with threaded brass inserts to center the filter-cell in front of the tube opening (13mm diameter; 24mm length). This fastening system keeps the filter snugly in place and centers the filter. Each bolt features injection molded rubber grip-faces, shaped to easily slide onto any telescope tube but hard to come off.
No tool mounting and adjustment of the centering bolts to fit a wide variety of mechanical tube diameters. Bolts are made to contact the
outside
of the optical instrument tube for most applications.
For some optical items (such as refractor and Newtonian reflector telescopes), you may be able to attach the bolts on the
inside
of the instrument tube. However, this requires a clear depth of about 20mm on the inside for adequate engagement of the centering bolts which many instruments (like binoculars, camera lenses, and SCT/Mak-Cass telescopes) do not have.
Includes non-rotating sliding fasteners made from aluminum that hold the centering bolts.
Additional Phillips screws are integrated into the sliding fasteners so that the centering bolts can be firmly fastened with a screw driver if preferred by the user.
Index scale provided beside each adjustment slot - adjacent to each sliding fastener - for fast and repeatable adjustment of the filter cell onto different telescope tubes.
Black sliding washers supplied to securely cover the full length of the adjustment slots in the aluminum frame – for blocking sunlight from passing trough the filter cell beside the filter area.
Three security straps included to secure the position of the filter cell with Velcro-adhesive pads. A safety feature to absolutely ensure a secure fit in front of the telescope under virtually all circumstances.
Securely packed in a cardboard box with stiff cardboard inlay for safely shipping the filter; Instruction booklet included.
About Baader AstroSolar Film and Solar Filters
The world's finest objective solar filter material - Baader Planetarium's AstroSolar Safety Film - is now available in a complete range of high-quality mounted Baader Solar Filters. Their innovative design and construction enables each filter to fit a wide range of instruments - from high end telescopes, to spotting scopes, camera lenses, and even special versions to fit binoculars. Each filter is precisely mounted at Baader onto special cells, guaranteeing a stress-free mounting that preserves the full optical quality of the AstroSolar film.
Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass. However, this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar is mounted entirely stress free onto Baader's filters in order to perform like a high precision plane-optical window. Even though it may seem counterintuitive, Baader AstroSolar film must show slight ripples! When the film is put under stress by an improper cell mount, its optical quality is degraded and it performs just like a common coated glass-filter made of untreated float glass.
In its September 2000 issue, Sky & Telescope magazine proclaimed Baader Planetarium's AstroSolar Safety Film to be "the new standard in solar filters." AstroSolar Safety Film delivers white light views of the Sun that are unmatched by any other objective solar filter or material. The views through AstroSolar display fine solar details, including fine penumbral detail, solar granulation, and lighter colored faculae. The disk is set against a dark background, free of the haze and scatter that is common in typical 'mylar' films or inexpensive glass filters. The performance of Astro Solar Filter Film is even more remarkable when considering its very low cost.
What is even more important - with AstroSolar Film the Sun appears in its real color - neutral white (with only a slight bluish tinge). Other films and glass filters produce a blurry bluish or reddish/orange/yellow Solar image, thereby cutting part of the spectrum. Especially with an orange sun, it is very hard to see faculae regions which are visible predominantly in the blue portion of the spectrum.
Due to its neutral color balance, AstroSolar Film enables the use of various color (or interference) filters which allows the observer to concentrate on certain spectral passbands for investigations of different layers within the solar "atmosphere". It is also possible to further improve the stability and sharpness of the solar image through the use of the Baader Solar Continuum Filter (sold separately). Views of granulation and faculae are particularly enhanced through the use of this continuum filter, in combination with AstroSolar film.
Please note that you cannot see solar prominences with white light solar filters such as this - that requires the use of sophisticated and significantly more expensive narrowband solar filters or telescopes. Solar filters made with AstroSolar Film with a neutral density (ND) of 5.0 can be used for visual and photographic, imaging and video applications.
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.
Back to Top
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.
Back to Top
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.
Back to Top
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.
Back to Top
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.
Back to Top
Click any image below to view hundreds of products in our eBay Store...