William Optics GT153 Gran Turismo Triplet APO Telescope
- 153 mm Aperture f/7.8 Imaging Refractor Telescope
- Triplet w/ FPL-53 glass for Apochromatic performance
- Covers full frame imaging circle (44 mm)
- Two-speed 3.5" Dual-speed Feather Touch Focuser
- FT Focuser is 360 degree rotatable
- Colors: Available in 3 colors, Blue, Red, and Gold
- Includes: Mounting rings, Guiding Rings, and Handle
- Weight: 13.5 kg (29.5 lb)
- Limiting Magnitude (Visual Use) = 14.7
- Includes Dust Cover with built-in Bahtinov Mask
- Adjustable/Retractable Dew Shield
- Optics are Zygo Interferometrically tested
- Printed Interferometer Report is available at extra price
The William Optics GT 153 APO Telescope is a high quality Apochromatic Imaging and visual use telescope with an aperture of 153 mm and a focal length of 1188 mm or an f-ratio of f/7.8. This GT 153 APO Telescope from William Optics can be used with a camera mounting system, with various T-mounts for cameras (not included), or equally well as a visual observing instrument. Features a top-quality triplet air-spaced objective, Designed by a leading designer with FPL-53 glass. The telescope utilizes precision optics with STM coatings. This GT 153 APO telescope is extremely sharp and has great color correction which is ideal for astrophotography.
This GT 153 APO Telescope from William Optics is available in three colors, Blue, Red, and Gold. Choose the color you wish to buy from the drop-down menu above. All three models sell for the same price.
You will be astonished by the small details you can observe through this APO 153 mm while doing visual observing; fine details of DSOs, with stunning resolution both visually or during astrophotography. If you wish to take great astro-images with a high quality APO refractor, this William Optics GT 153 APO Telescope is the ultimate way to achieve your imaging goals, with its focal length of 1188 mm. Its FPL-53 glass air-spaced Triplet lens design provides images with extreme sharpness, clear details, with APO color correction.
Incorporates the renowned 3.5" Feather Touch extra heavy duty focuser, which is ideal to use with astro-imaging, providing ideal focusing with no image shift at all! Plus, the focuser is 360° rotatable for easy camera composition. The 153 mm objective is a great size for both wide-field and planetary visual observations, and its apochromatic performance makes it ideal for imaging. It is worthwhile to note that this size and weight of the telescope will require a suitable mount in order to do astro-imaging.
New for 2019: Now, when you purchase this GT 153 APO Telescope from William Optics, you will be assured that the optical performance of this telescope achieves a Strehl Ratio of > 0.92 (Strehl) because they are testing each optical system on a Zygo Interferometer to confirm that performance specification. In addition, each telescope is star tested by William Optics professionals to guarantee the ultimate in optical performance. A printed report of the Zygo testing results is available at extra cost.
Includes dual Mounting rings and Guiding rings, 3.5" Dual-speed FT R & P Focuser, 3" Rotolock Adapter, Losmandy style Dovetail Plate, CNC Carrying Handle, and the new innovative Bahtinov Mask cover. It can be used visually or with digital cameras, and is compatible with a Field Flattener (optional purchase).
Introducing a first innovative feature in the industry: Now this GT 153 APO Telescope from William Optics comes standard with a dust cover that has a built-in, clear Bahtinov Mask for perfect focusing every time. Simply remove the flat front cover plate, leaving the dust cover cuff in place on the telescope. Point the telescope at a bright star, and focus carefully. When the bright central diffraction spike looks exactly centered between the other two spikes forming an "X", then your telescope is in exact focus for stars. Remove the dust cover cuff carefully from the objective end of the telescope, and you are ready to image.
|Telescope Type:||Triplet Apochromatic Refractor|
|Objective Aperture:||153 mm|
|Focal Length:||1188 mm|
|Strehl Ratio Guaranteed:||> 0.92|
|Focuser:||3.5" Dual-Speed Feather Touch R & P Focuser|
|Camera Connection:||Female 3.5" Feather Touch Focuser Thread|
|Camera Format:||Full Frame/APS-C Image Compatible|
|Tube Color:||Available in Blue, Red, or Gold|
|Tube Length:||1100 mm (Fully Retracted)|
|Tube Weight:||13.5 kg (29.5 lb)|
|Compatible With:||1:1 Full Frame Flattener|
|T-Mount:||Interchangable T-Mount Style for Compatibility|
|T-Rings:||None, T-Rings are available as optional accessories|