Vixen Telescope Accessory SPD Reducer 0.8x (26203-8)

Reducer for SDP65SS This reducer is designed specifically for the SDP65SS telescope. It shortens the focal length by approximately 0.8x and changes the f-stop from 5.5 to 4.4. Its image circle is φ30mm (covers APS-C cameras, with over 90% light intensity at the very periphery). Even at the very periphery of φ44mm full-frame cameras, it minimizes star image distortion while maintaining 70% light intensity. [Well-balanced, round star images] Even with the FL55SS Telescope + Reducer HD for FL55SS Kit, which has been well-received for its photographic performance, the peripheral image is slightly distorted when the spot diagram is enlarged to 100μm. The SDP65SS telescope provides well-balanced correction, resulting in a round, well-defined star image. [Supports wider field of view! 】 "The focal length of the SDP65SS telescope is shortened by approximately 0.8 times, and the F-number is changed from 5.5 to 4.4. The image circle is φ30mm (covers APS-C. 90% or more of the light is emitted at the extreme periphery). Even at the φ44mm extreme periphery of full-frame, 70% of the light is emitted while minimizing the distortion of star images. [Reducer for SDP65SS] "This is a reducer designed specifically for the SDP65SS telescope. The focal length is shortened by approximately 0.8 times, and the F-number is changed from 5.5 to 4.4. The image circle is φ30mm (covers APS-C. 90% or more of the light is emitted at the extreme periphery). Even at the φ44mm extreme periphery of full-frame, 70% of the light is emitted while minimizing the distortion of star images. [Well-balanced, round star images] Even with the FL55SS telescope + Reducer HD for FL55SS kit, which has been well-received for its photographic performance, the peripheral image is slightly distorted when magnified to 100 μm on the spot diagram. With the SDP65SS telescope, you can see that the correction is well-balanced, resulting in a well-rounded, well-defined star image. [Supports wider field of view!] The focal length of the SDP65SS telescope has been shortened by approximately 0.8x, and the f-stop has been increased from 5.5 to 4.4. The image circle is φ30mm (covering APS-C cameras, with over 90% of the light intensity at the very periphery). Even at the φ44mm extreme periphery of a full-frame camera, the image distortion is minimized while maintaining 70% of the light intensity. Image Circle: φ30mm Lens Construction: 2 groups, 2 elements