Televue Big Barlow (DISPLAY-MINT IN BOX)

The glass on this high quality Barlow is in great condition, no visible spots on the multi-coated glass.

Televue Big Barlow is a telescope accessory designed and manufactured by Tele Vue Optics, a reputable company known for producing high-quality eyepieces, Barlows, and other telescope accessories. 

The term "Barlow" generally refers to a type of lens system used in telescopes to increase the effective focal length of the telescope. This increase in focal length results in higher magnification when used in conjunction with an eyepiece. Televue, being known for its commitment to optical excellence, typically produces Barlows that aim to maintain image quality and minimize optical aberrations.

Here are some general features and characteristics you might expect from a Televue Big Barlow, based on their reputation and typical design principles:

1. Quality Optics: Televue is known for using high-quality optics in their products, which can contribute to sharp and clear views through your telescope.

2. Multi-Element Design: Televue Barlows often feature multi-element lens designs to maintain optical performance and minimize chromatic aberrations.

3. Compatibility: Televue Big Barlows are likely designed to be compatible with various telescopes and eyepieces, providing flexibility for astronomers.

4. Build Quality: Televue products are generally known for their sturdy build quality. The construction materials and design contribute to durability and longevity.

5. Threaded Barrels: Televue Barlows often feature threaded barrels, allowing you to attach them securely to your telescope and eyepieces.