Kenko 400mm F8 IIS Mirror Lens announced – Specs and Sample Images

Press text:

Product Details and Samples

The reflected optics using a mirror realizes an amazingly compact size and lightness while being ultra-telephoto of 400 mm. The inner reflection of the T-mount part has been suppressed and the performance has been improved. The unique ring blur unique to mirror lenses is attractive. We have a lineup of 8 types of mounts for single-lens reflex and mirrorless.

• The mount is T-mount type and removable. You can also convert it to another mount.
• The focus is manual. Exposure is only supported by aperture-priority AE(A) or (Av), or manual (M).
• Depending on the camera, you need to set “Allow release without lens”.
• Suggested retail price: Open
  [Released on December 24, 2021]

Specs

• focal length: four hundred mm
• brightness: F8 (fixed
• )Lens configuration: six pieces in two groups
• angle of view: 6°8′ (35mm full size)
• size: 112mm x Φ74mm (for mirrorless)
  82mm x Φ74mm (for SLR)
• weight: 545g (for mirrorless)
  500g (for SLR)
• filter diameter: 67mm (front side)
  30.5mm (mount side)
• Minimum focusing distance: one thousand fifteen meters
• Maximum magnification: one two and a half
• Focus method: Front ball pull-out method, manual focus
• squeezed blade: none
• hood: Dedicated hood (included) KMH-671
• mount part: T-mount used (installed at the time of shipment)
• Mirror lens 400mm f/8 N II S Fujifilm X KF-M400FXIIS

via kenko-tokina