BAADER PLANETARIUM AA2458421 Focusing Square Filter Po 50X50MM 3MM Optically

( Brand: Baader Planetarium ), ( Manufacturer Part Number: AA2458421 ), ( Type: Telescopes Astronomy ), ( Vendorproductnumber: Fc-sq50 )

Review BAADER PLANETARIUM Clear Focusing 50x50mm Square Filter 3mm Thick Optically Po

The Baader Planetarium AA2458421 is a high-performance, 50mm x 50mm square filter designed specifically for astronomical observations. This filter boasts an outstanding 3mm thickness, providing exceptional optical quality and durability.

The heart of this filter is its advanced optical design, which is optimized for use with 50mm x 50mm imaging systems and telescopes. The 3mm thickness ensures that the filter can effectively block unwanted light pollution while transmitting the desired wavelengths, resulting in enhanced contrast and improved image clarity.

This Baader Planetarium filter is made from Schott B270 glass, which is renowned for its exceptional flatness, low scatter, and high transmittance. The filter's edges are precision ground and polished to ensure a perfect fit with imaging systems and telescopes.

The AA2458421 is coated with Baader's proprietary Multi-Coating (MRC-nano), which is a state-of-the-art, broadband multilayer coating that provides exceptional reflection control and reduces unwanted reflections and ghost images. This coating is applied using a unique, vacuum deposition process that ensures consistent quality and longevity.

Additionally, the filter is treated with Baader's Iron-Neutral Density (IND) coating, which effectively blocks unwanted light pollution while maintaining the desired color balance. This coating is particularly effective in urban environments where light pollution is a significant issue.

The Baader Planetarium AA2458421 is also compatible with the company's FOCUSer2 filter holder system, which enables easy filter swapping and offers additional benefits such as improved filter positioning and image stabilization.

In summary, the Baader Planetarium AA2458421 is a high-performance, 50mm x 50mm square filter that offers exceptional optical quality and durability. Its advanced optical design, Schott B270 glass construction, and proprietary coatings make it an ideal choice for astronomical observations in urban environments where light pollution is a significant issue.

The Baader Planetarium AA245-8421 is a 50mm x 50mm, 3mm thick, square optical flat filter designed for use in telescopes to improve image quality by reducing and eliminating various types of optical aberrations. Here are some pros and cons of buying this filter:

1. Improves image quality: This filter can help to reduce and eliminate various types of optical aberrations, leading to improved image quality in your telescope.

2. Reduces coma: Coma is a type of optical aberration that can cause star images to appear as comas or smears instead of points. This filter is effective at reducing coma, resulting in sharper and more defined star images.

3. Eliminates field curvature: Field curvature is another type of optical aberration that can cause images to be out of focus at the edges of the field of view. This filter can help to eliminate field curvature, resulting in a flatter and more even focus across the entire field of view.

4. High-quality glass: The filter is made from high-quality Schott B270 glass, which is known for its excellent optical properties.

5. Optically flat: The filter is optically flat, meaning that its surface is perfectly parallel and perpendicular to the edge, ensuring consistent focus across the entire field of view.

1. Expensive: The Baader Planetarium AA245-8421 is a high-end filter and comes with a premium price tag.

2. Requires a telescope with a compatible thread size: The filter requires a telescope with a Crayford or Ritchey-Chretien focus mechanism and a compatible thread size (M48 or T2) to attach it.

3. May not be necessary for all telescopes: Depending on the quality of your telescope and the types of aberrations that are present in your images, you may not need to invest in this filter.

The Baader Planetarium AA245-8421 is a high-quality, optically flat filter designed to improve image quality in telescopes by reducing and eliminating various types of optical aberrations. While it comes with a premium price tag, it can be a worthwhile investment for those who require the highest level of optical performance from their telescope. If you have a high-end telescope with a Crayford or Ritchey-Chretien focus mechanism and are experiencing issues with coma or field curvature, then this filter may be a good investment for you. However, if you have a lower-end telescope or are not experiencing significant issues with optical aberrations, then you may not need to invest in this filter.

If you are a serious astronomer or astrophotographer with a high-end telescope and a need for the highest level of optical performance, then the Baader Planetarium AA245-8421 is a worthwhile investment. However, if you are just starting out in astronomy or astrophotography, or have a lower-end telescope, then you may not need to invest in this filter at this time. Instead, consider focusing on improving your observing skills and learning more about your telescope and the various types of optical aberrations before investing in more advanced accessories like this filter.

Details:

Part: FC-SQ50, Clear Focusing 50x50mm Square Filter - Limited 2-Year Manufacturer Warranty. Memory cards and any other Blister Pack items are not returnable once opened. Diorama has no control over these charges and cannot predict what they might be. No guarantees for other times.

Full Wave length Throughput, Unmounted for Versatile Use, Par focal with Baader LRGB Filters, Allows Sharp Focus Before Imagine, Anti-Reflection Fully Coated. Its square shape and adjustable nature make it versatile easy to use with a variety of camera lenses. Because of its superior design and craftsmanship, the Alpine Astronomical Baader Clear Focusing 50x50mm Square Filter is an essential tool for photographers seeking to enhance their image quality. This 3mm thick, optically polished filter is expertly engineered by Baader Planetarium, a brand renowned for its high-quality optical products.

WHO WE ARE: Diorama is one of the nations largest Photographic retail and mail order suppliers. Printers are not returnable once the Toner Cartridges have been installed or released. These charges must be borne by the recipient. Items must be in the original, undamaged manufacturers packaging with all materials, including instruction booklet's, packing inserts, and blank warranty cards.

The Baader Clear Focusing Filters optically polished surface guarantees exceptional optical clarity, blocking certain wave lengths of light while allowing specific ones to pass through. Items with free shipping are only shipped to the 48 contiguous USA. The filters clear focusing feature allows photographers to achieve precise focus before introducing colored and specialty filters, ensuring sharp, distortion-free images every time.

part #: aa2458421 prices

• $58.85-$107.00

specifications telescuper:

• brand: Baader Planetarium
• mpn: Aa2458421
• type: Telescopes Astronomy
• vendorproductnumber: Fc-sq50

returns telescuper:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller
• method: Money back

general telescuper:

• Cameras Photo > Binoculars Telescopes > Telescopes
• condition: New

seller telescuper:

• city: Chattanooga, Tennessee
• rating: 99.4%
• # reviews: 597882

shipping telescuper:

• carrier: UPS
• transit: 2-5 Days
• cost: $0.00
• class: One-day
• service: UPS Next Day Air
• type: Fixed

offer telescuper:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• sold: 0
• started: September 10, 2025

payments telescuper:

• other
• wallet: Paypal
• credit card: Discover

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