Bintel Field Flattener for ED72 And ED80


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SKU: K1.0x-DAU

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  • Helps solve field curvature on small, fast refractors
  • For refractor telescopes with focal lengths of 400mm to 660mm
  • For focal ratios of f/5 to f/7.5
  • Works with 2″ focuser
  • Accepts 2″ filters
  • 38 mm clear opening

High quality, fast refractors have a lot going for them when it comes to astrophotography but they come with a downside – field curvature. This is where the image comes to sharp focus on a curved surface. The problem is that the sensors in cameras are flat. The larger the sensor – like those used in cameras with APS-C sized or larger sensors or DSLR cameras – the more effect is noticed.

A field flattener brings the image to focus on a flat surface, like your camera’s sensor. At the same time, the basic optical performance of your telescope remains the same.

You will need 55mm of backfocus.

The Bintel T-thread Spacer Ring Kit (sold separately) is recommended to achieve proper distance for use with CMOS imagers.

Use with a DSLR only requires a T-ring for the camera (T-ring sold separately).

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