SKU:AQE-0005

1¼” Questar Adapter

Name: 1¼” Questar Adapter
Brand: TeleVue
SKU: AQE-0005
Price: 99.00 USD
Availability: InStock

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Product description

Getting the Most From Your Questar 3.5

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.

Tele Vue Eyepieces That Focus in Finder and Telescope Mode

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	12	72	8.9	8	108.3	0.66
	10	72	10.7	6.8	130.0	0.56
	8	72	13.4	5.3	162.5	0.44
	6	72	17.8	4.1	216.7	0.33
DeLite	18.2	62	5.9	10.2	71.4	0.84
	15	62	7.1	8.6	86.7	0.71
	13	62	8.2	7.4	100.0	0.61
	11	62	9.7	6.3	118.2	0.52
	9	62	11.9	5.1	144.4	0.42
	7	62	15.3	4.0	185.7	0.33
Key: FL = Focal Length, AFOV = Apparent Field of View, Mag. = Magnification &, TFOV = True Field of View. Questar Specs: Aperture: 89mm, Finder Mode FL: 107mm, *Telescope Mode FL: 1300mm