The William Optics Gran Turismo 81 with Internal Focus Design (WIFD)
Innovation in deep sky astrophotography with a revolutionary design
A New Game Changer for Beginner and Adept Astrophotographers
William Optics an innovative telescope manufacturer has introduced something fantasic to the world of astrophotography, something that will change the way newcomers and experienced users can enjoy imaging deep sky objects with and with less hassle. Deep sky photographers have enjoyed many of their revolutionary designs such as a built in bahtinov mask, rotolock, the Redcat 51/71 and more. Now they have introduced to many aspiring astrophotographers the William Optics Gran Turismo 81 with Internal Focus Design (WIFD). Take a moment and see how this new design is earning the title "Game Changer" and will make a beloved addition to your journey amongst the cosmos.
Internal Focus Design, A Truly Amazing Stock Focuser
Most traditional refractors come with either a Rack and pinion or Crayford style focuser, often times users can find themselves looking to upgrade to finer focusers which can be quite costly. Reasons for this is that those looking to step up their quality often find the stock focusers that come with a majority of entry level refractors underperforming and can lead to some unwanted artifacts in their images. William Optics saw this and answered the call with their Internal focus design. Traditional focusers use a drawtube that moves in and out of the OTA to achieve focus, however if you're attaching a camera, a filter wheel/drawer, an off axis guider or you may have a DSLR/Mirrorless camera with a battery extension then you may be packing on a heavy load on the back of the telescope. This can cause issues such as focuser slip, unwanted vignetting and what most experienced astronomers dread in their final image "Tilt!". The internal focus design however works more in the sense of a camera lens but without the helical ring focuser some users often find dissuading to use. This moves the lens element forward and back versus a drawtube moving in and out. This helps as well with balance on the DEC axis as you won't have to worry about the weight shifting more in the back which often times even seasoned astrophotographers can let go unnoticed.
Say Goodbye to Tilt!
What is tilt and why is it such a frustration amongst the astrophotography community?
For those who don't know, take a look at the picture above under the traditional focuser. This best gives a visual representation of what tilt is. Basically as the drawtube moves out and with the gear you have on the back of your OTA, you'll notice that gravity will play its part as it always will. This will cause unwanted artifacts due to the camera sensor not being evenly aligned to the objective lens. The most noticeable symptoms of tilt will be one side/corner of your image will have stars that look elongated, distorted and even a bit out of focus. Many in the hobby will come up with solutions which can in itself be costly and time consuming. As you can see William Optics takes out the part where you'll be spending time fighting tilt in their internal focus design as there will not be a drawtube to be pulled down by gravity causing the flexure in which gives tilt.
Flatteners and Reducers
To achieve a flat field or if you'd like to have a flat field with a wider field of view and faster optics the WIL-P-FLAT68III and WIL-P-FLAT6AIII are best suited to achieve this (not included).
(Note you will need adapter WIL-AD-M80-45-M48, not included)
Additional Information
Or you can give us a call at 818.347.2270 or chat with us, and we'll be glad to help you.
Conclusion of a Game Changer
The William Optics Gran Turismo 81 with Internal Focus Design is a true game-changer in the world of astrophotography. With its innovative design, including the Internal Focus System and the use of the finest quality materials, this refractor provides users with a superior imaging experience. The WIFD system ensures that the focal point remains constant throughout the focusing process, making it much easier to capture stunning astrophotos. Astrophotographers looking to capture the best possible images of deep sky objects can rely on this revolutionary design to produce pinpoint stars and high-quality results. As Carl Sagan once said, "Somewhere, something incredible is waiting to be known." With the William Optics Gran Turismo 81, you can capture that incredible beauty and share it with the world.
For more information call us at 818.347.2270 or email [email protected]
