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Explore Scientific

Explore Scientific Field Flattener for f/5 to f/7 Refractors — Edge-to-Edge Sharp Stars for Astrophotography

Explore Scientific Field Flattener for f/5 to f/7 Refractors — Edge-to-Edge Sharp Stars for Astrophotography

Regular price $139.99
Regular price Sale price $139.99
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The Explore Scientific Field Flattener for f/5 to f/7 Refractors corrects the natural curvature of a refractor's focal plane, so stars stay pinpoint-sharp all the way into the corners of your frame. It's a key astrophotography accessory for clean, professional-looking wide-field images with ED and apo refractors.

Who it's for

Astrophotographers using f/5 to f/7 refractors who want flat, edge-to-edge sharp stars. New to imaging? See our astrophotography for beginners guide.

Key features

  • Flattens the field for edge-to-edge pinpoint stars
  • Matched for f/5 to f/7 refractors
  • Keeps the native focal length (no reduction)
  • Essential for clean wide-field astrophotos

Specifications

Type Field flattener
Matched for f/5 to f/7 refractors
SKU ES-FF2F5/F7

Frequently asked questions

Flattener or reducer?
A flattener keeps your telescope's native focal length while making stars sharp to the corners; a reducer also shortens the focal length for a wider, faster field. Choose a flattener for framing/scale.

Will it fit my refractor?
It's matched to f/5–f/7 refractors. Confirm the required back-focus/spacing for your camera to get the flattest field.

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Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
Orders are usually processed within 1–2 business days, and standard delivery takes 4–8 business days after that. You'll receive a shipping confirmation email with your tracking number as soon as your order ships. Free standard shipping applies to the 48 contiguous US states. For full details, visit our Shipping Policy.
You have 30 days from delivery to request a return. Items must be unused, unassembled, and in their original packaging with all accessories. To start a return, email info@telescopewolves.com with your order number — returns sent without approval can't be accepted. For change-of-mind returns, you cover return shipping and a 5% restocking fee applies. Refunds go back to your original payment method. See our full Refund Policy for details.
Yes! If you find a lower advertised price on an identical, new, in-stock item from an authorized online retailer within one month of your purchase, we'll refund you the difference (item price plus shipping, excluding taxes). Just email info@telescopewolves.com with your order number and a link or screenshot of the lower price. Learn more on our Price Match Guarantee page.
All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
Please inspect your order as soon as it arrives. If anything is damaged, defective, or incorrect, email info@telescopewolves.com within 48 hours of delivery with your order number, a short description, and photos of the item, and we'll arrange a replacement or refund.
Absolutely. Our team is available Monday to Friday, 9am–5pm EST. The best way to reach us is by live chat or by email at info@telescopewolves.com. You can also visit our Contact Us Page.