Explore Scientific 2" Field Flattener for ED APO Refractors

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Explore Scientific 2" Field Flattener for ED APO Refractors
Item # ES-FFEDAPO-00
5 Questions(s)

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  • The Explore Scientific 2" field flattener was designed to be compatible with any ED refractor that will accept 2" accessories.
  • Corrects the natural field curvature exhibited by refractor optical designs.
  • Crisp, sharp images from edge to edge - a must have accessory for the astrophotographer.


Explore Scientific 2" Field Flattener for ED APO Refractors

One of the truths of refractor optical design is a curved focal plane.  While the center of the view remains crisp and clear the edges of that view become increasingly out of focus.   Even the most precision ground optics will exhibit curvature but while this is typically not an issue for the observing astronomer - who's target is typically in the center of the field of view - blurry edges can be a huge issue for the astro photographer.    With the addition of this field flattener, aberrations that are caused by this curvature are corrected! Your images will be tack sharp from edge to edge.  Created using fully multi-coated optical glass to maintain optical integrity, the Explore Scientific will slide securely into the 2" opening of your telescope.

Manufacturer Product Number: FFEDAPO-00
Additional Information

Additional Information

UPC Code 812257014736
Manufacturer Explore Scientific
Barrel Size 2"
Warranty Lifetime Warranty
Included Items

Included Items

  • 2" Field Flattener
Questions & Answers

Product Questions

Is the male thread on the "Explore Scientific 2" Field Flattener For ED APO Refractors" M42 or M48 ?
How many lens elements does this unit have?
Most field flatteners are designed for a specific scope or a certain range of focal lengths. It looks really short and that would be a big plus. Will it work with my 130mm f/7 ? and how about my faster f/6 and f/5 scopes ?
is the telescope tube end internally threaded to accept 2" filters?
I would like to know if this flattener will be really good to astrophotography use with my Explore Scientific 80 mm F6 apo.
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