SharpStar 2.5" Field Flattener

• SharpStar 2.5" barrel Field Flattener
• Ideal for use with most APO Refractors
• Fully illuminates Full-Frame sensors on most refractors
• Back Focus is 55 mm
• Has an M69 male thread to mate with cameras

This SharpStar 2.5" Field Flattener is made to be ideal for use with your APO Refractor telescope to provide a fine flat image field for doing astro-imaging. It is designed to fully illuminate standard Full-Frame sensors on most refractor telescopes, whether APO-designs or not. It also comes with a 36.5mm adapter with a M48x0.75 thread to easily attach a camera to obtain a back focus of 55mm. It mates perfectly with your 2.5" accessory barrel on your focuser or other equipment. An M68 male thread and an M63 female thread are on the telescope side of this Field Flattener Lens.

The 2.5" Field Flattener Lens from SharpStar has a back focus distance of 55 mm which is a commonly-encountered back focus requirement with many astro-imaging cameras available today. It also offers an M69 male thread to mate with cameras. This Field Flattener from SharpStar has a beautiful appearance as well as high optical quality, to further enhance your personal astro-imaging and telescope equipment.

Specifications: