Apochromatic telescopes
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The ASKAR APO 72 mm f/5.6 quintuplet apochromat from Sharpstar is optimized for astrophotography with high resolution cameras
- Aperture 72 mm
- Focal length 400 mm / focal ratio f/5.6
- 5-element quintuplet design with corrector in tube
- Two ED glasses in the objective for very good correction of the chromatic aberration
- 44 mm image circle with full illumination and correction
- 140 mm working distance for visual observation or focal length reduction
- Stable 3" dual-speed RAP focuser with 360° rotation
- 2" and 1.25" receptacles as well as M68x1 external thread for screw adaptations
- Long adapter from M68 to M48x0.75 camera connection is included in delivery (with 2" filterthrad)
- Flexible GP/EQ5 style dovetail bar with photo tripod connection and carrying handle with flexible slotted hole
- Finder shoe for standard finder holder
- Including inspection check list of the manufacturer
The ASKAR FRA 500/5.6 APO quintuplet apochromat from Sharpstar is optimized for astrophotography with high resolution cameras
- Aperture 90 mm
- Focal length 500 mm / focal ratio f/5.6
- 5-element quintuplet design with corrector in tube
- Two ED glasses in the triplet objective for very good correction of the chromatic aberration
- 55 mm image circle with full illumination and correction
- 158 mm maximum working distance from drawtube with all adapters for photography and observation
- Stable 3.5" dual-speed RAP focuser with 360° rotation
- Adapters to M68x1, M54x0,75, M52x0,75 and M48x0,75 are included in delivery
- Starting with the M48 thread, you have comfortable working distance for all common astro cameras, DSLR and system cameras
- Flexible Losmandy style dovetail bar with photo tripod connection and carrying handle with flexible oblong hole
- Finder shoe for standard finder holders
- Including inspection check list of the manufacturer
With the FRA600 F/5.6 quintuplet astrograph, Askar has created a pure-color apochromat for astrophotography with large sensors.
- Aperture 108 mm / 4.3"
- Focal length 600 mm
- Focal ratio f/5.6
- 5-element design - the 2-element corrector is permanently installed in the tube
- 66 mm image circle with full illumination and correction
- 140 mm working distance for observation with 2" star diagonal
- Long transition adapter for photography to M48x0.75 with 2" filter thread included
- Rugged 4" RAP focuser with dual speed reduction and 360° rotation
- Losmandy style dovetail bar
- Flexible tube rings with carrying handle and lateral threads for individual adaptations
- Finder shoe for standard finder bracket
- Each FRA600 comes with an inspection checklist from the manufacturer and is also tested on our optical bench
New 5-element APO astrograph with 90mm diameter and 450mm focal length (F/5)
The optical design shows a polystrehl value of 0,97, indicating a level of correction that is absolutely top of the line.
The three-lens design of the EXPLORE SCIENTIFIC ED-Apochromats provides everything an amateur astronomer desires - at a reasonable price....
Highly corrected 102mm air-spaced triplet apochromat (with three lenses) and carbon fiber tube and a 2.5" high-precision HEXAFOC focuser.
High Quality 127 mm ED Apo by Explore Scientific.
The optical design shows a polystrehl value of 0,97, indicating a level of correction that is absolutely top of the line.
The three-lens design of the EXPLORE SCIENTIFIC ED-Apochromats provides everything an amateur astronomer desires - at a reasonable price.
The three-lens design of the EXPLORE SCIENTIFIC ED-Apochromats provides everything an amateur astronomer desires - at a reasonable price.
Omegon 121mm/678mm Quintuplet Apochromat, flat field and 4" focuser