Explore Scientific 3" Field Flattener & .7X Focal Reducer - FFFR507X-00

$479.99
Article number: FFFR507X-00
Availability: More on the Way to us
Delivery time: More on the Way to Us

 Explore Scientific’s 3” Field Flattener .7x Focal Reducer is a multi-faceted accessory designed to enhance your astrophotography experiences. As a field flattener, this piece addresses the edge-of-field aberrations caused by curved focal planes to ensure your night at the eyepiece will result in crisp, true images.

When you attach the Explore FFFR507X-00 to your Explore 127 or 152 refractor telescope, it will improve the flatness of the field & reduce the telescope's effective focal ratio by .7X. A flat field translates to sharper, more pinpoint stars out to the furthest reaches of the field of view, and reducing the focal length creates a wider field of view and, when imaging, allows for shorter exposure times. The back focus is 55 mm as measured from the rear flange.

The Explore Scientific 3” Field Flattener & .7X Focal Reducer is fully multi-coated for a high level of clarity and brightness, and comes with a M42x0.75 adapter to help you attach your DSLR or CCD camera. If attaching a DSLR, please note that you will still need a T-ring for your camera brand. The extra photo at left shows all of the components…the focal reducer/field flattener body, a 3” nosepiece, and the M42 adapter.

  • Diameter: 78.3 mm
  • Weight: 1.4 lb.
  • Height: 90.1 mm
  • Back Focus: 55 mm from rear flange
  • Thickness of M42 Adapter: 6.25 mm
  • As a focal reducer, this device will reduce your f-ratio by .7, which results in a wider field of view, brighter images and less exposure time. Recommended for our 127mm and 152mm refracting telescopes, this field flattener/focal reducer boasts fully multi-coated optics and comes with 2 adapters to accommodate different focuser sizes.

    While technically this was designed for the F/8 system, through user experiences and our subsequent testing we have concluded that our 3" Flattener / Reducer performs very well with our F/7.5 refractors.

Description 3" Field Flattener .7x Focal Reducer for ED APO 152mm F/8 and ES Refractors down to F/7.5
  Item Number FFFR507X-00
  Weight 1.4lb; .64kg
  Diameter 78.3mm
  Height 90.1mm
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