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Baader 2" Rowe Coma Corrector For Newtonian Telescopes

# Rcc-i 2956800

USD $298.26

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SKU: N/A Cameras & Photo / Binoculars & Telescopes / Telescope Parts & Accessories / Telescope Eyepieces & Lenses

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Baader 2" Rowe Coma Corrector for Newtonian Telescopes # RCC-I 2956800
The new Baader Planetarium RCC-I (Rowe Coma Corrector) is designed specifically to correct Coma in fast Newtonian imaging systems.  The RCC is the ideal match for today's Digital SLRs and CCD Cameras. Long Back Focus:
  • The RCC-I triplet optical design has been optimized to work at a large 91.5mm back-focus distance, enabling the use of Off-Axis Guiders, Adaptive Optics, and Filter Wheels.  The RCC even allows users of DSLRs to incorporate off-axis guiding with the Baader RCC Off-Axis Guider.
  • No magnification increase:
  • Unlike most other coma correctors, the RCC-I does not impart a barlow effect - it works at 1:1, with no loss in imaging speed or reduction in field size.
  • Fast Imaging Speeds:
  •   The RCC-I has been optimized for Newtonians with focal ratios from f/3.5 to f/6 (nominally designed for f/4). 
  • Ease of Focus:
  • Addition of the RCC-I into the optical train extends the focal point slightly (approximately 5mm, in an f/4 system).  This important attribute ensures that your system will be able to reach focus without needing to shift the primary mirror or increase the size of the secondary mirror (of course, this assumes your system will already reach focus without the RCC).

  • The RCC-I inserts into 2" focusers and has external T-threads on the camera side for attachment to any other T-threaded accessory.  The RCC-I also includes a removable stop flange.  Removal of this flange allows the RCC to be fully inserted into 2" focusers.  The RCC is also threaded for standard 2"/48mm filters.
    The RCC is designed for a nominal 91.5mm distance from the mounting flange to the image plane (55mm is the standard dimension for all SLRs, measured from the front of their T-adapter to their image plane). The 91.5mm distance needs to be held to within +/-3mm for best image quality.  We sell a range of adapters and extension tubes that can be used to configure practically any imaging system to meet the 91.5mm requirement.  In particular, we recommend the Baader VariLock Variable Extension Tubes.
    Users of DSLRs will find the Baader RCC Off-Axis Guider to be the perfect compliment to the RCC-I. It is designed to have the proper spacing needed to meet the 91.5mm requirement, and offers precise axial and radial adjustments for ease of locating guidestars. Back Focus Example:
    Assume that you have a DSLR and the matching Baader RCC off-axis guider. That combination of equipment has a combined path length of 91.5mm (which is intentionally the back-focus spec of the RCC). If you attach a plain 2” nosepiece to the front of the Off Axis Guider + DSLR and then insert them into the 2” focuser of a Newtonian, your scope would need at least 91.5mm of back focus in order to reach focus on the chip of the DSLR. Now, remove the 2” nosepiece and replace it with the RCC-I. Re-insert the assembly fully into the focuser until the off axis guider seats against the focuser (the RCC inserts fully into the focuser since it is 2” OD), focus the camera, and you should find that the focuser would be racked out about 5mm farther than it was with just that plain 2” nosepiece.
    The weight of the RCC by itself is 142gm (5oz).
    China 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.
    You can pay via any payment method that Pricetronic accepts. B. Shipping Method:
    United States Postal Service (USPS) or United Parcel Service (UPS) at your choice and expense (our choice if the item has free shipping option). Pricetronic orders for items over $1,500 can only ship via UPS. C. Order Processing Time:
    Orders received by 12 noon Mon – Fri US Pacific Time generally ship on the same business day. Orders received after 12 noon PT or on weekends/holidays will ship by the next business day. D. Checkout:
    Please pay for the item(s) within 3 days from your account on Pricetronic or by using the link in the email you receive from Pricetronic. E. Shipping Discount:
    We offer combined shipping if you order multiple quantities/items and if items can be combined. Pricetronic will automatically show you the correct combined/discounted shipping costs when you check-out. F. Combining Purchases:
    You can combine shipping for items purchased from us on Pricetronic within 3 days. Buy the items individually and check out together for all items. Pricetronic will combine the shipping weights and show you the discounted shipping cost. You must check out for all items together via Pricetronic for this. We cannot combine shipping costs if you check out individually for your purchases. G. Sales Tax/VAT:
    Sales tax or VAT may be charged and collected by Pricetronic as required by law based on your ship-to address and local tax/VAT rates. Please check with Pricetronic.
    3. US SHIPPING A. Delivery Time:
  • USPS First Class shipments will generally take 3-5 business days to arrive after we ship it. Priority Mail shipments will generally take 2-3 business days. However, these delivery times are NOT guaranteed by the USPS. Delays of up to 2 (or sometimes even 3) weeks can occur in about 5% of the shipments due to Covid, operational, or other issues.
  • UPS shipments will generally take between 1 and 6 business days to be delivered depending on the method you select.
  • USPS and UPS do NOT offer any refunds for shipping/delivery delays for ANY reason (except for UPS Next Day Air service). Delays are out of our control once your order ships. B. Tracking/Delivery Confirmation:
    Pricetronic will update you once your order ships. You can see the order status or tracking information/link from your Pricetronic account at any time. C. USPS Tracking Limitations:
    Please note that is common for USPS tracking to show “Shipping Label Created, USPS Awaiting Item” or “Shipment Received, Package Acceptance Pending” even several days after your order ships. This does not mean that there is a problem with your order or that we have not handed over your package to USPS yet. This simply means that your package is en route without an outbound scan and tracking will not be updated until the package reaches a distribution center at your end several days later.
    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. B. Delivery Time:
    Please note that Pricetronic’s delivery estimates shown are generally too optimistic! 1. UPS (All Shipping Methods):
  • We strongly recommend the use of UPS for international orders due to issues related to the ongoing Covid situation. Delivery time usually varies between 3-7 business days depending on your country and the exact shipping method you select.
  • 2. USPS First Class International:
  • First class packages will usually be carried by GlobalPost (a USPS international delivery partner) for most of the way. Delivery at your end will be handled by your local postal service.
  • Delivery generally 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 very limited tracking available for 1 st class shipments and there is no inquiry/tracing service.
  • 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 6-8 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 or lack of tracking, DO NOT USE First Class mail - use Priority or Express shipping, or better still, UPS instead.
  • Packages are not considered lost unless 60 days have elapsed from the date of shipment.
  • 3. USPS Priority Mail International:
    Delivery takes about 2 weeks to most countries 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. Packages are not considered lost unless 60 days have elapsed from the date of shipment. 4. USPS Express Mail International:
    Delivery usually takes 5-10 business days after we ship your package. Packages are not considered lost unless 30 days have elapsed from the date of shipment. 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 claim if your package is delayed. Delays are quite common but losses are very rare, so your patience and understanding will be greatly appreciated. C. Brokerage Fees, Customs and Duties:
  • You are responsible for any carrier brokerage fees and duties/taxes that may be levied in your country. These are not included in our item price or shipping cost. UPS brokerage fees can be quite hefty.
  • 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 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.

    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. B. 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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