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Vixen Focal Extender PH Set for R200SS

Vixen Focal Extender PH Set for R200SS

Regular price $540.99
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Features

  • Increases the focal length by a factor of 1.4
  • The focal length of the R200SS is increased to 1120 mm (F5.6)
  • Interior matte surface prevents reflections
  • Special anti-reflective AS coating
  • 99.9% light transmission per lens surface
  • Construction: 4 elements in 3 groups
  • Weight: 245 g

Description

The best focal extender designed for Newtonian telescopes for serious astrophotography.

Made in Japan and designed for astrophotography, this premium extender lens system converts the R200SS parabolic mirror Newton reflector into an F5.6 astrograph. The Extender PH kit was developed to increase the focal length by a factor of 1.4x It increases the focal length of the 800mm (F4) R200SS Newton reflector to 1120 mm (F5.6).

The optical system structure of 4 elements in 3 groups corrects the coma error to render sharp images up to the edge of the field of view. The extender illuminates the field of a full-frame camera (44 image circle). When used in combination with the eyepiece adapter, the 31.7 mm eyepiece can be used for visual observations.

The same anti-reflective AS coatings used on our high-end VSD 100 f/3.8 astrograph are also used here to provide an outstanding light transmission of 99.9% per lens surface.

The completely matte surface in the interior keeps loss of light, ghosting and scattered light to a minimum. When used with the 50.8 mm eyepiece adapter, the extender PH kit provides a high-performance Barlow lens for visual observations and eliminates coma and aberrations over the entire field of view.

Specs

Magnification 1.4X
Focal length R200SS: 800mm (F4) to 1120mm (F5.6)
Optical coatings AS coatings (More than 99.9% light transmission per surface)
Construction 4 elements in 3 groups
Image circle 44mm
Thread diameter and thread pitch M56mm, 0.75mm (male), or fits to 50.8mm visual back
Filter size 48mm
Visual observing Possible with an optional Eyepiece adapter
Dimensions and weight 56mm x 128mm long, 245 g

Warranty

Vixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type:

Vixen Electronic Parts: Limited One Year Warranty

Vixen Mechanical Parts: Limited Two Year Warranty

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CA Residents: Prop 65 WARNING(S)

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      30-Day Return Policy: no postage, no restocking fee, no worries!

      Astraeus Optics will cover shipping fees as well as any restocking fee that the manufacturer enforces.


      To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Custom made items are not eligible for returns or refunds.

      There are certain situations where only partial refunds are granted: (if applicable)

      • Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
      • Any item that is returned more than 30 days after delivery


      You can request a refund by Contacting Us.
      We will credit you for the total purchase price upon the receipt of your return. Products returned under this policy are eligible for a refund to the original method of payment.


      Defective Product Returns

      We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at support@astraeusoptics.com


      Refunds

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      If more than 15 business days have passed since we’ve approved your return, please contact us at support@astraeusoptics.com

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