Tele Vue Questar Adapter - 1.25

* The Televue Questar Adapter will let you use any Televue 1.25" eyepiece on your Questar telescope.

* Black anodized knurled focusing ring allows focusing to the viewfinder optics.

* The Televue Questar Adapter provides improved resolution, color correction and contrast due to the multicoating, blackened lens edges, and new designs.

The threaded eyepiece barrels accept Nebular and other filters, if desired. And, with fields of view up to 82 degrees, diffraction limited anywhere in the field, your Questar 3.5 finally delivers the magnificent capability inherent in its design and construction. Overall, we recommend the Nagler 9mm and Panoptic 19mm. While all 1.25" Televue eyepieces can be used with the Questar, only the following will focus in the finder mode and offer parfocalization (no need to adjust focus when changing eyepieces) as well: * Plössl 32*, 25, 20, 15, 11 & 8 * Panoptic 24*, 19 & 15 *Questar opening limits the field of the 32mm Plossl and 24mm Panoptic

Unleash the potential of your Questar 3.5 with Tele Vue's 1¼". Just add our Questar adapter to use any of the Tele Vue 1¼" eyepieces: Plössls, DeLites, Panoptics, Delos, Naglers and Ethos!

• Experience a greater range of magnification and quick-change capability.
• Discover improved resolution, color correction and contrast due to the multicoating, blackened lens edges, and new designs.
• The threaded eyepiece barrels accept Nebular and other filters, if desired.
• And, with fields of view up to 100°, diffraction limited anywhere in the field, your Questar 3.5 finally delivers the magnificent capability inherent in its design and construction

The aperture opening in Questar eyepiece holder limits the true field of view in eyepieces with large field stops. However, compared to the 24mm Questar supplied eyepiece, the Tele Vue 19mm Panoptic has 17% wider true field and the 24mm Panoptic has a 30% wider true field, even with vignetting limiting its potential.

Overall, we recommend the Delos 10mm and Panoptic 19mm. While all 1¼" TVO eyepieces can be used with the Questar, only the following will focus in the finder mode and offer parfocalization (no need to adjust focus when changing eyepieces) as well.

Eyepiece				Finder Mode			Telescope Mode
Model	FL (mm)	AFOV (°)		Mag. (x)	TFOV (°)		Mag. (x)	TFOV (°)
Plössl	25	50		4.3	11.4		52.0	0.93
	20	50		5.4	9.2		65.0	0.75
	15	50		7.1	6.7		86.7	0.56
	11	50		9.7	4.9		118.2	0.40
	8	50		13.4	3.5		162.5	0.29
Panoptic	19	68		5.6	11.4		68.4	0.94
Delos	10	72		10.7	6.8		130.0	0.56
	6	72		17.8	4.1		216.7	0.33
Key: FL = Focal Length, AFOV = Apparent Field of View, Mag. = Magnification &, TFOV = True Field of View. Questar 3.5 and Bino-Vue — Extraordinary Using the Tele Vue Bino-Vue body, the full potential of 24mm Panoptics are realized, without vignetting limitations. Refocusing the Questar for Bino-Vue results in the Questar increasing its focal length by over 40%. Amazingly though, the now unleashed 24mm Panoptics have so much field that the true field is still larger than with the standard Questar 24mm eyepiece in normal mode. Of course, the Bino Vue accepts all 1¼" Tele Vue eyepieces: Plössls, Panoptics, Naglers, Delos and Ethos. Questar and Ethos 13mm — Looks are Deceiving A customer asked us to check out this combo. Compared to the Questar supplied 24mm Brandon eyepiece, Ethos produces almost twice the power plus 1/3 more true field area. It may be the only eyepiece a Questar owner needs: 100x / 200x with Questar Barlow. Note that Ethos 13mm, 10mm, 8mm, & 6mm will focus, but not in finder view.       Getting the Most From Your Questar 7 For 7" Questar models that accept 2" eyepieces, we recommend 27mm Panoptic or 22mm Nagler Type-4 (both have about same true field size), 20mm Nagler Type-5 and 17mm Nagler Type-4. Features This finely crafted piece is CNC machined out of solid aluminum stock to complement the Questar. Its polished aluminum base has blackened anti-reflection threads on the inside aperture to improve contrast. A black, anodized, knurled focusing-ring allows focusing to the Questar viewfinder optics, and a lock-screw (with two locations for convenience) gives extra security.