Apochromatic Refractors
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Apochromatic Refractors
We can offer you a range of very high quality refractors in this category. These include e.g. our two- and three-lens APM Apo instruments, our astrograph series, available as APM or APM-LZOS models. Equipped with Riccardi reducers / correctors or as a high-end version CNC LW II with Feathertouch extracts. All around excellent instruments that should leave no wishes.
Quadruplet flat-field astrograph with a 111 mm aperture for observation and astrophotography
- Aperture 131 mm / Focal length 983 mm / Focal ratio f/7.5
- Quadruplet design with field corrector built into the tube
- Triplet objective with excellent chromatic correction thanks to an ED element, single element field corrector
- Illumination and field correction up to full-frame
- Retractable dew shield for easier transport
- 360° rotation for proper camera orientation
- 3" R&P focuser with M78, M54, M48 photo threads and 2" connection
- Connection option for 2" filters available
- Two finder shoes - 1 for a finder scope, 1 for a guide scope
- Including complete optics test by Teleskop-Service on the optical bench (autocollimation) - star image extrafocal, intrafocal and focal as well as Ronchi test and protocol - so you will get a 100% tested telescope.
- Connection: M56x0.75
- Extension factor: 1.04x
- Number of lenses: 2
Quadruplet flat-field astrograph with a 111 mm aperture for observation and astrophotography
- Aperture 111 mm / Focal length 766 mm / Focal ratio f/6.9
- Quadruplet design with field corrector built into the tube
- Triplet objective with excellent chromatic correction thanks to an ED element, single element field corrector
- Illumination and field correction up to full-frame
- Retractable dew shield for easier transport
- 360° rotation for proper camera orientation
- 3" R&P focuser with M78, M54, M48 photo threads and 2" connection
- Connection option for 2" filters available
- Two finder shoes - 1 for a finder scope, 1 for a guide scope
- Including complete optics test by Teleskop-Service on the optical bench (autocollimation) - star image extrafocal, intrafo
The compact FS-60CB Apo can be upgraded to a 60/600 f/10 quadruplet Apo with this 1.7x Q module. Optically, this version is superior to the FS-60CB ...
- Extension factor: 1.7x
- Number of lenses: 2
The Askar 80ED with 80 mm aperture and 560 mm focal length offers good color correction and is ideal for mobile use.Aperture 80 mm / focal length 560 mm / focal ratio f/7
- Improved color correction due to the use of ED glass
- High-quality dual-speed R&P 2" focuser - optimized for astrophotography
- Motorized focus systems, like ZWO-EAF can be adapted directly
- M58x1 external thread on the focuser for screw adaptations
- Correctors for astrophotography calculated for the ED available (0.7x, 0.85x and 1.0x)
- With a weight of only 2 kg and a transport length of 40 cm, ideal for traveling
- 2 finder shoes, CNC rings, dovetail bar, carrying handle included in the scope of delivery
This extender is suitable for the Takahashi fluorite apochromats FS-60CB, FS-60Q, FC-76D (both versions), FC-76Q, and FC-100D (all versions). However, it is also compatible with the older Sky-90 and FSQ-106 fluorite models, which are no longer manufactured. Of course, it can also be used with many other devices as a moderate focal length extension.
- Connection: M43x0.75(pos)
- Extension factor: 1.6x
- Number of lenses: 5
