♦ Aperture 90 mm - focal length 450 mm - focal ratio f/5
♦ Air-spaced FPL53 triplet objective - no relevant chromatic aberration
♦ High-quality 2-element ED corrector, permanently installed in the tube
♦ 100% illuminated and fully corrected image field to full format
♦ Freedom from reflexes due to optimized lens positions and best possible coating of the lenses
♦ High-quality 3.2" R&P focuser with M63x1 and M48x0.75 connections on the camera side
♦ Connection thread for 2" nebula filter is integrated in the focuser
♦ High-quality design with CNC tube rings and EQ5 style dovetail bar
♦ Multi-function handle - can also be used as a base for guiding scopes or piggyback camera mounts
♦ The corrector is fixed in the tube, as soon as you have focused the camera, you are automatically at the right distance for an optimal field correction.
♦ The 3.7" focuser is supplied with an extension from M63x1 to M48x0.75 with a screw-in option for 2" filters.
♦ Tilting mechanism with push and pull screws to compensate for a misalignment of the camera sensor for perfect edge stars.
♦ Every 90 mm quintuplet apo is optically and mechanically checked before dispatch at Teleskop-Service.
Optical design: | 5-element APO refractor with field flattening |
Lens: | 3-element FPL53 triplet with air gap |
Image field: | Fully illuminated and corrected image field with 48 mm diameter |
Focuser: | 3,2" R&P focuser with 360° rotation and tilting device |
Connection thread: | M63x1 internal thread and M48x0.75 external thread |
Tube length: | 358 mm with retracted dew shield |
Dew shield: | can be extended (80 mm) |
Weight: | 5.3 kg with tube rings, dovetail bar and carrying handle |