Long Perng S500M ED Apo - aperture 90 mm f/5.5 - 2.5" focuser
Very fast travel apochromat with 90 mm aperture and 500 mm focal length
- Aperture 90 mm / focal length 500 mm
- Very fast f/5.5 lens for short exposure times
- Perfect travel telescope with only 410 mm transport length
- Oversized 2.5" Crayford focuser for very good illumination also with CCD and DSLR cameras
- Dual speed transmission for precise focusing
- High-quality 2 element ED lens for a contrasty image without chromatic error
Long Perng 90 mm f/5.5 wide-field refractor for observing and astrophotography
A very fast refractor with a bright and contrasty image. The multi-coated ED lens gives a brilliant and high-contrast image with really top-class images of stars. Through the ED element, the chromatic aberration is very well kept under control, so this apo can be used for a multitude of applications:
♦ Wide-field observing ... You can effortless get into focus with 2" eyepieces - a gigantic field of view of almost 5° offers spectacular views on the large nebula areas of our galaxy.
♦ Astrophotography ... With the optional TSFLAT2 field corrector, there is a high-quality optics available for photography of nebulae and galaxies. Even cameras with large sensors can be used. Thanks to the 2.5" focuser, the field of view is not vignetted. For this telescope, we offers focal reducers, too.
♦ Daytime use ... The 90 mm apo can easily compete with extreme-quality spotting scopes and offers a brighter image and a noticable larger field of view. With the optional 2" Amici prism TSA45, you get a comfortable 45° insight and a correctly orientated image - ideal for bird watching.
♦ Telephoto lens for photography ... With only a few steps, the astronomical telescopes turns into a fast manual telephoto lens with 500 mm focal length and fixed f/5.5 focal ratio. Thereby, good photographs are possible even in difficult lighting situations.
Universal attaching through the versatile connector plate:
At the base of the apo, you can find a universal connector plate with two 1/4" photo threads. With this, you can adapt the telescope to good tripod heads, similar to a spotting scope.
But can also adapt a dovetail bar to the base and then attach the apo to an astronomical mount. Suitable bars can be found in the "recommended" section below.
The apo is particular fast:
With a focal ratio of f/5.5, this apo is faster than the most other apochromatic refractors we know of. The high speed comes with a few advantages. The Feld of view gets large, especially in photography. Furthermore, the high speed allows for short exposure times, in astrophotography as well as in nature photography under extreme conditions. We offer suitable correctors for high sharpness over the whole field.
The 2.5" Crayford focuser for better illumination:
A special feature is the high-quality focuser. With 2.5", it is oversized, ensuring optimal illumination in astrophotography. That can´t be offered by a simple 2" focuser. Of course, reducing adapters to 2" and 1.25" with compression rings are included in the scope of delivery.
The focuser offers a 360° rotation, so you can always rotate the camera or eyepiece into the desired position.
- 90/500 mm ED Apo with focuser
- Reducer to 2" and to 1.25" with compression ring
- Protective caps for lens and focuser
The compact 90 mm Apo by Long Perng - a perfect and versatile travel Telescope!