William Optics Gran Turismo 81 IV Triplet APO (A-F81GTIV)
William Optics Gran Turismo 81 IV Triplet APO (A-F81GTIV)
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Product Description
The William Optics Gran Turismo 81 Imaging APO Telescope is a high quality Apochromatic Imaging optical telescope with an aperture of 81 mm and a focal length of 478 mm or an f-ratio of f/5.9, without the optional Reducer/Flattener.
If you wish to take great astro-images with a high quality APO refractor, this William Optics Gran Turismo 81 Imaging APO telescope is a good way to obtain your goal. Its FPL-53 glass APO design provides images with extreme sharpness, clear details, great color, with APO grade color correction.
Introducing a first innovative feature in the industry: Now this Gran Turismo 81 Imaging 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 scope. 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.
Recommended Optional Accessories
- T-Mount for
- M4/3
- Nikon
- Canon
- Sony a
- Pentax
- Fuji
- Guiding Scope
- Flattener
- Eye Piece & Prism
- Finder Scope & Ring
- Red Dot Finder
What can I see with a William Optics Gran Turismo 81 IV Triplet APO (A-F81GTIV)?
Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.
Jupiter with
25mm Eyepiece - 19x Magnification
(Sold Separately)
Jupiter with
10mm Eyepiece - 48x Magnification
Sold Separately
Jupiter with
5mm Eyepiece - 96x Magnification
Sold Separately
Moon with 25mm Eyepiece
19x Magnification
(Sold Separately)
Moon with 10mm Eyepiece
48x Magnification
Sold Separately
Moon with 5mm Eyepiece
96x Magnification
Sold Separately
Andromeda with 36mm Eyepiece
13x Magnification
Sold Separately
Andromeda with 25mm Eyepiece
19x Magnification
(Sold Separately)
Andromeda with 10mm Eyepiece
48x Magnification
Sold Separately
What's in the Box
Specifications
| Focal Length: | 478mm |
| Diameter: | 81mm |
| Aperture: | f/5.9 |
| Camera Format: | APS-C Full Frame |
| Focuser: | 2.5" R&P Focuser |
| Image Circle: | > Full Frame |
| Recommended Flattener: | FLAT 6A III |
| Tube Length: | 390mm (Fully Retracted) 460mm (Fully Extended) |
| Tube Weight: | 3.9 kg |
| Interchangeable T-Mount: | Canon EF Nikon F Sony E Pentax Micro Four Thirds Fuji FX |
Note: William Optics uses high quality steel lens cells and FPL53 glass for WO triplet series (GT and FLT) - this combination is perfect for temperature compensation and will prevent pinched optics in cold weather conditions.
Before you store the telescope you have to uncover it and let the tube to stay open for some time. After the telescope dry up, moisture will evaporate and it can be safely stored. You must to store your telescope in a dry place with a constant room temperature.
Otherwise lens cell will rust and lens coating will be damaged by fungus.
