A new take on Telrad's iconic finder, this version of the Reflex Sight is offered with a switchable red or green reticle for good contrast against the background. It is outfitted with a generous 2.5 x 1.4" viewing window that provides a wide unmagnified true view of the sky, unlike conventional finder scopes that offer limited fields of view presented upside down and backwards. Three concentric rings—spaced at 4, 2, and 0.5°—provide an easy point of reference for locating objects and quick navigation when manually star-hopping. An easy-to-use, infinitely adjustable rheostat enables precise brightness control so users won't hurt their night-adjusted vision. A mounting base is included, and the sight easily detaches from it for storage or to move it to another OTA with a separate mounting base already attached without requiring it to be recentered with the OTA.

Provides Unmagnified True View of Sky    Triple Concentric Ring Reticle    Choice of Reticle Colors    Large 2.5 x 1.4" Viewing Window    Precise Infinitely Adjustable Rheostat    Quick-Detach Mount for Easy Storage    Weight: 11 oz Mount    Runs on Two AA Batteries

• Wide unmagnified field of view
• Generous 2.5 x 1.4" viewing window
• Reticle can be switched between red and green for optimal contrast against background conditions
• Long eye relief
• Zero parallax
• Provides uncluttered, correct 'real sky' view for quick manual sighting of known objects like planets, stars, clusters, and galaxies

• Red or green illumination makes the reticle clearly visible without affecting night-adjusted vision
• Three concentric circles set at 4, 2, and 0.5° to help 'star hopping'
• Infinitely adjustable rheostat allows for precise illumination control

• Quick detachment from the mounting base enables it to be removed and installed quickly without recalibration
• Runs on two user-supplied AA batteries
• Weight: 9 oz without mount

Related Questions and Answers

Q: 1. Is the "donut-shaped bokeh" what we otherwise know as "circles of confusion"?

A: No. The sharpest point of focus on a camera's sensor would be a single point on the camera's sensor. "Circles of confusion" describes the small area of what our eyes would perceive to still be in "acceptable focus," but which do not fall as single points of focus on the sensor. They are circles slightly larger than a single dot (point), but which are small enough to still be perceived as in focus. Bokeh describes the quality of the out-of-focus area in an image, so "donut-shaped bokeh" are not perceived as being in focus and is not considered circles of confusion. --- The distinctive shape of the bokeh from mirror lenses comes from the design of the lens and the placement of the reflecting mirror in the center of the image. Light enters the optical tube, passes a small mirror, and strikes a concave mirror at the rear of the tube. The light is focused back toward the small mirror and reflected back through a hole in the concave mirror where the camera or eyepiece is mounted. The result is bokeh with a bright edge and a relatively dark center (similar to a donut).

Q: 2. Will focus peaking work when mounyed to a OLY OMD EM1 mkII?

A: Focus Peaking will work on the Olympus OM-D E-M1 Mark II with the Tokina SZX 400mm f/8 Reflex MF Lens for Micro Four Thirds.

Q: 3. Can the lens hood be reversed and stored on the lens?

A: The Tokina SZX 400mm f/8 Reflex MF Lens for Nikon F's lens cap cannot be reversed and stored on the lens.

Q: 4. Do this need and/or come with an adaptor for Fujifilm. Is this lens auto focused, or totally manual focus?

A: This lens comes with an adapter and is manual focus only.

Q: 5. Has anyone been able to use focus peaking with this lens on a Fuji X camera?

A: This is a very new lens and so there is not much information on real use. But like any lens if the camera has focus peaking it should technically be able to do that with this lens. And with most others that fit on the camera.

Q: 6. Are the four holes in the top plate suitable for grub screws or some other item to hold the tripod head in place (to keep it from rotating)?

A: No, those holes are for the downward screws that attach the black part to the silver base.

Q: 7. What is the top threaded connection where the head or camera would be attached?

A: This unit has a 3/8"-16 for attaching a tripod head. It would not be directly compatible with most cameras.

Q: 8. If this lens is already a Nikon F-mount, why does it need an F-mount adaptor?

A: The lens itself is a T mount which makes adaptable to many cameras with the right adapter. It says Nikon F mount because it's coming with the F mount adapter.

Q: 9. Can the focal length of this lens be increased with a teleconverter?

A: This may be used with teleconverters that have no optical tube in their design, but not traditional teleconverters (such as Nikon's own 1.4x and 2.0x) that have them.

Q: 10. Can I use the Sony emount version on a Sony mirrorless full frame camera?

A: The Tokina SZ 500mm f/8 Reflex MF Lens (Sony E Mount) is compatible with all Sony full-frame mirrorless cameras.