FRA500 F5.6 APO Astronomical Telescope Quintuplet Astrograph with High Performance Focus Adjustment System for Askar

FRA500 F5.6 APO Astronomical Telescope Quintuplet Astrograph with High Performance Focus Adjustment System for Askar

Description:
- Askar FRA500 is the third product in the FRA series. Compared to Askar FRA400, it has an aperture diameter of 90mm, a focal length of 500mm, and a focal ratio of f/5.6, which can better meet the needs of deep space celestial photography; Compared to the Askar FRA600, it is more agile and light, perfect for outdoor observation and on-site astronomical photography.

- In terms of optical design, the Askar FRA500 adheres to the high-quality design concept of the FRA series and adopts a five piece fully separated APO Pittsburgh lens design from the front three to the back two. The front three piece fully separated lens group contains two ED glasses, which can effectively correct color difference and improve imaging sharpness. The rear two piece fully separated lens group can increase the flatness of the image field. Therefore, even at the very edge of the field, the star can reach a very excellent level. The imaging circle of Askar FRA500 is 55mm, which is higher than the 44mm imaging circle. Allowing enthusiasts to no longer worry about the quality of surrounding stars. The back intercept is also the design of "focusing is the best", and astronomy enthusiasts no longer need to repeatedly calculate the back intercept distance or struggle to find a suitable connecting ring.

- The Askar FRA500 still pursues a combination of practicality and artistry in mechanical design. The overall line of the equipment is smooth and the layout is reasonable. The front end of the star camera is a dew protection cover with a classic red decorative ring. When the protective cover is fully extended, the overall length of the camera lens is 452mm; After retracting the protective cover, the overall length of the camera is 410mm. The back-end is a high-quality 3.5” Toothed focusing device. The focusing device is equipped with a coarse adjustment handwheel and a 1:10 fine adjustment handwheel, which can easily realize two speed focus adjustment, and has high practical value in actual astronomical photography and observation. The surface of the focusing device is polished well, the paint layer is uniform, and the internal scale is accurate and clear. The focusing device is solid and stable, and the left side is equipped with a standard finder-scope base and a hand screw. Therefore, the Askar FRA500 focusing device can effectively carry finder-scope, guide telescope and other celestial objects astronomical accessories and meet the needs of accessory combinations for astronomical photography or observation. The Askar FRA500 still includes a pair of highly acclaimed multifunctional hoops. The upper end of the clamp is connected to the handle, and the bottom is connected to the Askar wide dovetail plate. The white main lens barrel and protective cover, the bright black focusing device, and the red hoop and decorative ring make the color combination of the entire shooting lens lively and steady.

- The Askar FRA500 has a total length of 410mm and weighs approximately 4.1kg, making it extremely convenient to carry and install. It is very suitable for astronomy enthusiasts who often need long-distance travel and on-site astronomical photography. The Askar FRA500 astronomical telescope has received praise and support from astronomical enthusiasts for its huge aperture, ultra fast focal ratio, meticulous focusing system, unique optical design, and excellent imaging effects. The Askar FRA 500 will be your best companion on your astronomical observation and photography journey.

Package Included:
- 1 x Astronomical Telescope
- 1 x User Manual