1.25" GSO Optical IR Blocking IR Cutoff Filter For Sale
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1.25" GSO Optical IR Blocking IR Cutoff Filter:
$32
1.25" GSO Optical IR Blocking IR Cutoff Filter
1.25" GSO Optical IR Blocking IR Cutoff Filter
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Quick Overview
Product Name:
1.25" GSO Optical IR Blocking/IR Cutoff Filter for Telescopes
Item Condition:
Brand New
Item Ships in US Via:
USPS First Class or Priority Mail with delivery confirmation
1. Detailed Product Description
An infrared filter (also called an IR Block filter) is a very important accessory for imaging with today's CCDs, digitial cameras or webcams. Imaging sensors in these cameras are sensitive to visible light as well as to infrared wavelengths. As a result, images of stars might be bloated and lunar and planetary images will be soft.
GSO's IR Blocking filter is recommended for use with CCD, video & webcams for sharper images. It threads on to any CCD camera, eyepiece, or adapter that accepts 1.25" filters. Such filters are required when imaging with refractor telescopes. Compound reflectors (like Schmidt-Cassegrain and Maksutov-Cassegrain telescopes) will also benefit from an IR-block filter to some extent. Even imaging through Newtonian telescopes will benefit since IR filters will reduce "IR bleed". As an added advantage, use of this filter also acts as a dust cover for the sensitive CCD chip in imaging devices.
This filter has an extremely sharp cutoff at 690nm, yet it transmits all the visible red wavelengths (including the important 656nm H-alpha emission line) and prevents IR wavelengths from blurring fine detail in your digital images. GSO does not provide a transmission curve for its filter but we had one tested at the physics lab of a local college. The tested unit had peak visible light transmission of over 95%.
The filter cell is beautifully machined and black-anodized with threads on both sides (male on one side and female on the other), so you can stack this filter with other 1.25" filters. Its clear aperture is a full 26mm. The filter glass is scratch resistant and the filter can be used with a telescope of any f-ratio. The glass substrate is of very high optical quality, so it can be used in front of a lens without degrading the image quality. In fact, the GSO filter is a more expensive coated "dichroic" filter that displays a pinkish reflecting tint, as opposed to cheaper "absorbing glass" IR block filters which exhibit a greenish tint.
The GSO IR Blocking filter ships in a protective, foam-lined, plastic storage case.
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.
Text and photos - Copyright Agena AstroProducts. Reproduction without permission prohibited.
2.1 Payment and Shipping Methods
- We only accept PayPal and major credit cards (Visa, MC, American Express, Discover) through PayPal.
- All orders are shipped via US Postal Service (USPS) only.
2.2 Checkout
- Please pay within 5 calendar days after you commit to buy. After 7 days, our software will automatically start the eBay cancelation process if payment is not received.
2.3 Combining Multiple Items
- You can combine shipping for items purchased from our listings on eBay within 3 days. To get combined shipping, first purchase your items, and then check out and pay for all items together via eBay in one transaction. 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. Please check the eBay FAQ/Help sections if you are not sure how to check out and pay for several items together.
2.4 Sales Tax
- 9.75% sales tax will be added to all orders shipped to a California address.
3.1 Shipping
- Orders weighing 13 oz. or less can be shipped via USPS First Class or Priority Mail. Orders weighing more than 13 oz. are shipped via USPS Priority Mail.
- Most orders ship on the next business day (excludes weekends and holidays) after payment is received.
- You will receive an automatic shipping notification email as soon as your order ships along with your delivery confirmation (tracking) number.
3.2 Delivery Time
- First Class Mail takes 4-7 business days to arrive after we ship your package. Priority Mail takes 3-5 business days.
- These are typical delivery times and are NOT guaranteed by the US Postal Service. In shipping thousands of orders over 7+ years, our experience is that about 95% of orders arrive within this timeline. However, delays of up to 2-3 weeks can occur sometimes, even for Priority Mail service.
- Please contact us if you have not received your first class package in 3 weeks, or your priority mail package in 2 weeks, and we will work with you to resolve the issue.
3.3 Order Tracking / Delivery Confirmation
- USPS Delivery Confirmation (tracking) is included for all US shipments and this number will be sent to you when your order ships. This serves as proof of mailing and provides very basic tracking information via USPS's website. However, the USPS is not as prompt or detailed as UPS/Fedex, and can take several says to update this information on their site.
- If you are unable to track the package using the information we provide even after 2-3 days, the USPS scanning systems may have missed scanning your package, especially on small boxes. This happens in about 15-20% of the cases, and you may see a message indicating that "the USPS was notified of the shipment, but this does not indicate receipt by the USPS or the actual mailing date." Rest assured that your package has shipped and will arrive in a few days, even though USPS may not be tracking it.
4.1 Shipping Cost, Handling Fees, and Processing Time
- To determine your shipping choices and shipping cost for this item, please go to the "Shipping and Payments" section near the top of this page and select your country from the drop-down list. eBay will calculate your actual USPS shipping costs for this item.
- For all international orders, we charge an additional handling fee equal to 3% of the purchase price of the item(s). This will be added to your order total when you check out.
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Most orders ship on the next business day (excludes weekends and holidays) after payment is received.
- You will receive an automatic shipping notification email as soon as your order ships.
4.2 Shipping Choices, Order Tracking, and Delivery Time
- You will have the following shipping service choices:
(1) USPS First Class International: Delivery takes about 3 weeks after we ship your package. This can often take 4-6 weeks to several countries. There is no tracking for First Class shipments. The USPS provides a customs form number which just shows the date on which the package was prepared and when it was delivered. This is not tracking, as many people incorrectly believe, and even this very basic information is not updated for several days.
(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 a few (not all) countries with Priority shipping.
(3) USPS Express Mail International: Delivery usually takes 5-8 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.
- These are typical delivery times and are NOT guaranteed by the US Postal Service. Delays of several weeks can sometimes occur. 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. In most cases, customs clearance takes 1-3 days, but can sometimes take 7-10 days. We have even seen this take 30 days for an Express Mail shipment once. Upon shipping your order, delivery delays are beyond our control, so please do not leave us negative feedback for this reason.
4.3 Customs and Duties
- You might be subject to import duties and taxes, which are levied once the package reaches your country. Additional charges for customs clearance must be borne by you; we have no control over these charges and cannot predict what they may be. Customs policies vary widely from country to country. You should contact your local customs office for further information.
5.1 14-Day Money Back Guarantee
- If you are not 100% satisfied with your purchase, simply ship the item back in new, unused condition within 14 days of receiving it.
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US customers will be given a full refund of the purchase price of the item. International customers will be given store credit only.
5.2 Return/Exchange Policy
- You must ship the returned items within 14 days of receiving it. No returns can be accepted after this period. Please contact us first before sending any items back.
- All items must be in new (mint), resellable condition and must not show any evidence of use or wear, dirt, or blemishes of any kind. Items must be returned in their original packaging and should include all supplied materials and accessories provided. Please handle the received items very carefully with all original packaging until you are sure you will keep the item.
- If the item shows signs of use or abuse, a restocking fee will be deducted depending on the condition of the returned item.
- You will be responsible for all return shipping costs and for ensuring that the return package reaches us safely. Shipping/insurance costs paid to send the item to you are not refundable.
- We request that you use due care and diligence to be certain that you want the product you are ordering. Ensure that the item you order will fit on or work with your telescope before ordering it. Ask us for any information or help you may need before the sale. Take advantage of the internet and research the product online. This is especially important for selecting eyepieces (especially wide angle ones) that will work well with your telescope, or for diagonals/barlows/focal reducers that require additional focus travel.
5.3 Contacting Us
- Please use the "Ask a Question" link above to contact us. We respond to ALL inquiries by the next business day. If you do not hear from us within 2 days please check your spam/junk folder and contact us via eBay again if necessary.
5.4 Feedback
- PLEASE contact us first in case of any problems. We will do our best to resolve any issues you might have.
- Our software automatically posts feedback every evening for those who have left feedback for us.
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Basic Ordering and Shipping Information
- Payment methods: Paypal and credit cards through Paypal only
- Shipping method: US Postal Service
- Shipping for multiple purchases can be combined during check-out
- 9.75% sales tax for orders shipped to California
- No handling fee for US shipments. 3% handling fee added for all international orders during check-out
- Orders processed and shipped quickly by the next business day
- Delivery times vary by shipping method selected, and international delivery delays are common
- Additional customs fees/duties may be charged in your country for international orders
- 14-day return/exchange policy
- Please read ALL the detailed information provided in ALL the tabs above before making any purchase
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