Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
Stress Free, Secure Transactions
You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Product Description
Optically fast refractor telescopes used for astrophotography are often plagued by significant field curvature, which is especially noticeable when using CCD/CMOS imagers and DSLRs with APS-C sized and full-frame sensors. This manifests in stars that are out of focus on the periphery of the image frame. Orion's handy field flattener solves this problem by providing excellent field correction while preserving the focal length attributes of your telescope. With the field flattener, stars will appear in sharp focus across the entire frame.
Designed for use with refractors with focal lengths of 400mm to 660mm and focal ratios of f/5 to f/7.5, the Orion Field Flattener for Short Refractors lets you enjoy the full imaging potential of your fast refractor telescope. Fully multi-coated, 38mm clear aperture optics and a glare-reducing threaded interior ensure maximum image contrast.
We've upgraded the design of the Orion Field Flattener for Short Refractors to accommodate interchangeable thread-on camera adapters. And now we include both male M42 (standard T thread) and M48 (wide T thread) camera adapters (previously included only M42 adapter). The M48 adapter is recommended for use with full-frame camera sensors. Depending on which adapter you use, you will need the corresponding T-ring (M42 or M48) for your specific camera model (sold separately).Both the M42 and M48 adapters come with a thread-on aluminum cap.
The Orion Field Flattener for Short Refractors has fully multi-coated 2-element optics and a clear aperture of 38mm. It is compatible with 2" focuser drawtubes and its barrel is conveniently threaded for use with 2" filters. Backfocus distance of 55mm is required to achieve proper focus. This flattener is for photographic use only.