Explore Scientific 2" Field Flattener for Explore Scientific ED APO Telescopes
This item is discontinued by the manufacturer and is no longer available.
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Important Notes:
1) This field flattener is an excellent choice for cameras with cropped sensors: APS-C and smaller. It will not provide a flat field when used with full-frame cameras.
2) The working distance/backfocus requirement of this new version is 55mm (the working distance of the previous version FFEDAPO-00 was only 45mm). Hence, this item is designed to work with standard thickness T rings.
A curved focal plane is an inherent feature in most telescope designs and is nothing to note for general stargazers. But, for astrophotographers, the consequences of that same curved plane can ruin hours of patient imaging. Designed for refracting telescopes, Explore Scientific’s Field Flattener can tackle the edge-of-field aberrations caused by this necessary curvature to ensure your long night at the eyepiece will not be in vain. This accessory, which now has 55mm of backfocus (+/- 2mm), offers fully multi-coated optics and slides securely into the 2” eyepiece holder.
Optimized to work with Explore Scientific's f/6 - f/7 ED Apo refractor telescopes. Features a standard 2" nosepiece (with M48 female filter threads) on the telescope side and a male T / T2 thread (M42x0.75) on the camera side. Includes only one (lower) end cap.
Specifications
- Total length = 1.80" / 45.8mm
- Length of male T thread = 0.2" / 5mm
- Working distance = 2.17" / 55mm
- Length of 2" nosepiece = 1.22" / 31mm
- Maximum width = 2.08" / 52.9mm
- Weight = 4.2oz
Other Information
- Country of Manufacture: China
Important Notes:
1) This field flattener is an excellent choice for cameras with cropped sensors: APS-C and smaller. It will not provide a flat field when used with full-frame cameras.
2) The working distance/backfocus requirement of this new version is 55mm (the working distance of the previous version FFEDAPO-00 was only 45mm). Hence, this item is designed to work with standard thickness T rings.
A curved focal plane is an inherent feature in most telescope designs and is nothing to note for general stargazers. But, for astrophotographers, the consequences of that same curved plane can ruin hours of patient imaging. Designed for refracting telescopes, Explore Scientific’s Field Flattener can tackle the edge-of-field aberrations caused by this necessary curvature to ensure your long night at the eyepiece will not be in vain. This accessory, which now has 55mm of backfocus (+/- 2mm), offers fully multi-coated optics and slides securely into the 2” eyepiece holder.
Optimized to work with Explore Scientific's f/6 - f/7 ED Apo refractor telescopes. Features a standard 2" nosepiece (with M48 female filter threads) on the telescope side and a male T / T2 thread (M42x0.75) on the camera side. Includes only one (lower) end cap.
Specifications
- Total length = 1.80" / 45.8mm
- Length of male T thread = 0.2" / 5mm
- Working distance = 2.17" / 55mm
- Length of 2" nosepiece = 1.22" / 31mm
- Maximum width = 2.08" / 52.9mm
- Weight = 4.2oz
Important Notes:
1) This field flattener is an excellent choice for cameras with cropped sensors: APS-C and smaller. It will not provide a flat field when used with full-frame cameras.
2) The working distance/backfocus requirement of this new version is 55mm (the working distance of the previous version FFEDAPO-00 was only 45mm). Hence, this item is designed to work with standard thickness T rings.
A curved focal plane is an inherent feature in most telescope designs and is nothing to note for general stargazers. But, for astrophotographers, the consequences of that same curved plane can ruin hours of patient imaging. Designed for refracting telescopes, Explore Scientific’s Field Flattener can tackle the edge-of-field aberrations caused by this necessary curvature to ensure your long night at the eyepiece will not be in vain. This accessory, which now has 55mm of backfocus (+/- 2mm), offers fully multi-coated optics and slides securely into the 2” eyepiece holder.
Optimized to work with Explore Scientific's f/6 - f/7 ED Apo refractor telescopes. Features a standard 2" nosepiece (with M48 female filter threads) on the telescope side and a male T / T2 thread (M42x0.75) on the camera side. Includes only one (lower) end cap.
Specifications
- Total length = 1.80" / 45.8mm
- Length of male T thread = 0.2" / 5mm
- Working distance = 2.17" / 55mm
- Length of 2" nosepiece = 1.22" / 31mm
- Maximum width = 2.08" / 52.9mm
- Weight = 4.2oz
Other Information
- Country of Manufacture: China