Search results for 'astronomy astrophotography reducers-converter-correctors askar'
Askar FRA300 60mm f/5.0 Refractor
US$ 1,155.25The best seller of the quintuplet series, the FRA300 60mm; It is an instrument suitable for astrophotography.
Thanks to the quintuplet spaced in the air, it provides a flattened field up to 40mm diagonally without the addition of further flatteners/reducers.
Askar FRA500 90mm f/5.6 Refractor
US$ 2,133.53The best seller of the quintuplet series, the FRA500 90mm; It is an instrument suitable for astrophotography.
Thanks to the quintuplet spaced in the air, it provides a flattened field up to 44mm diagonally without the addition of further flatteners/reducers.
Askar FMA180 PRO Telephoto Lens F/4.5
US$ 443.78Askar's FMA180 PRO is a triplet APO refractor with double ED glass for excellent correction. The high-quality lenses produce a high-contrast, pure color image and meet the highest demands in astrophotography and observation.Askar APO 185 F/7.0 Triplet Refractor
US$ 6,224.52The Askar 185APO is a telescope (OTA) with an aperture of 185 mm, a focal length of 1295 mm and a native focal ratio of f/7.Askar 140 APO F/7.0 Triplet Refractor
US$ 2,400.34The Askar 140APO is a telescope (OTA) with an aperture of 140 mm, a focal length of 980 mm and a native focal ratio of f/7.Askar 120 APO F/7.0 Triplet Refractor
US$ 1,822.26The Askar 120APO's 120mm aperture provides undeniable advantages in light-gathering power, resolution, brightness and contrast, allowing you to capture more light and present more detail and brighter objects in your images. The increased aperture area, which is 36% larger than that of the 103APO, contributes to better performance.Askar 103 APO F/6.8 Triplet Refractor
US$ 1,199.72The Askar 103APO is an optical telescope (OTA) with an aperture of 103 mm, a focal length of 700 mm and a native focal ratio of 6.8.SkyWatcher Newton Quattro 150/600 f/4
Regular Price: US$ 532.71
US$ 443.78
The Newton Quattro 150/600 f/4 reflector optical tube is a telescope with a 150mm diameter and 600mm focal length particularly suitable for photographic use, thanks to the fast f / 4 focal ratio and the included coma corrector. Compact and versatile instrument, ideal for astrophotography.Sharpstar 76EDPH 76mm FPL53 F/4.5
US$ 1,244.1976mm triplet refractor FPL53 F/5.5 Sharpstar - Focal length 418mm - Focuser 2.5 "Rack & Pinion - Complete with 0.8x corrector reducer for dedicated FullFrame. The reducer takes the aperture to F/4.5OUT OF STOCK
Sharpstar 61EDPH-II 61mm FPL53 F/4.5
US$ 799.5261mm FPL53 F/5.5 Sharpstar triplet refractor - Focal length 330mm - 2" Rack & Pinion focuser - Complete with 0.8x reducer for reduction to F/4.5 and focal length of 275mmAskar FRA400 72mm f/5.6 Refractor
US$ 1,244.19Refractor 72mm flattened quintuplet Askar FRA400 focal length F / 5.6 - Correct image circle 44mmTS-Optics Doublet SD Apo 72 mm f/6 - FPL53
US$ 541.61TS Photoline APO refractor wit 72 mm aperture and fast f/6 focal ratio, a great travel telescope for observation and astrophotography.
- ♦ Powerful, aberration-free apochromatic refractor with 72 mm aperture and 432 mm focal length.
- ♦ Fast focal ratio: f/6
- ♦ FPL53 doublet objective (Ohara Japan), air-spaced - additional lanthanum element, so no chromatic aberration
- ♦ 2.5" dual-speed rack-and-pinion focuser - ball bearing mounted for maximum load with M63x1 female thread for adaptions
- ♦ Retractable dew cap - the apo even fits into the hand luggage
- ♦ CNC tube rings with versatile dovetail bar - EQ5 style and with photo tripod connection.
- ♦ Findershoe on the focuser is included
- ♦ Weight only 2.18 kg - transport length only 31 cm
The powerful 6-element Apo with 76 mm aperture and 342 mm focal length has been developed by Teleskop-Service for astrophotography.
- Aperture 76 mm
- Focal length 342 mm
- High focal ratio f/4.5 for short exposure times
- Illuminated and corrected image field of 44 mm diameter - usable up to full format
- Multi-coated FPL53 APO Triplet lens, free from false color
- Screwed 3-element ED corrector with 55 mm working distance from the M48 camera connection
- 3" RAP rack and pinion focuser with 360° rotation possibility
- 2" and 1.25" connection for observation are included - 1.25" and 2" accessories can be used
- 2" nebula filters can be screwed into the corrector
- CNC tube rings with handle, viewfinder shoe and V-style dovetail bar are included in delivery
- The handle offers adaptation options for guide scope or camera
TS-Optics 8" f/12 Cassegrain 203/2436 mm
US$ 1,084.11TS 8" f/12 Cassegrain telescope with fused Quartz mirror and only 33% obstruction - the ideal alternative to a Schmidt-Cassegrain
- Aperture 8" - 203 mm
- Focal length 2436 mm
- F-ratio f/12
- Large illuminated image field with 45 mm diameter
- Hyperbolic secondary mirror and parabolic primary mirror made of Quartz glass for stable focus position
- 99% reflection on primary and secondary mirror for an even brighter image
- Quick temperature adaption due to open design
- Pure reflective system without Schmidt plate or meniscus lens - fully suitable for Infrared
- Only 33 % linear obstruction - very well suited for visual astronomy
- 2" MONORAIL focuser with micro-gear reduction and 1.25" reduction are included
- M90 extension tubes for trouble-free focusing with almost any accessories included
- Internal baffles for higher contrast
- Losmandy style dovetail and Vixen/EQ5 style dovetail for trouble-free adaption to all popular mounts
- Finder-scope shoe is also included
- Very economically priced, compared with other classical Cassegrains
The 8" Ritchey-Chrétien is the perfect telescope for astrophotography, but it is also suitable for visual observation.
- ♦ Aperture 8" / 203 mm - focal length 1624 mm - focal ratio f/8
- ♦ Hyperbolic primary and secondary mirror for very high sharpness on the optical axis and a large well-corrected field for astrophotography
- ♦ Both mirrors made of fused silica for stable focus position
- ♦ 99% high-reflectivy coating on main and secondary mirror for an even brighter image and more contrast - special service from TS
- ♦ Quicker cooling down thanks to open construction and primary mirror ventilation
- ♦ Two Vixen style dovetail bars supplied - ideal for accessories like guiding scopes or a piggyback camera mount
- ♦ High-quality 2" dual speed MONORAIL focuser with 2" / 1.25" reduction adapter - motor focuser optionally available
- ♦ RC correctors for larger sensors from APS-C upwards are optionally available