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Astro-Physics Stowaway 92mm f/6.65 Refractor
Are you looking for a light and compact travel telescope with outstanding optics and perfect mechanics? Then you should take a closer look at the 92 Stowaway from Astro Physics.
This triplet lens scope has the same extraordinary quality that you have come to expect from Astro-Physics with a few new exciting features:
- Grab ‘n go visual travel companion. Follow eclipses around the globe or observe wildlife from afar!
- Dramatic deep-sky imaging with its optional Field Flattener (#1405342) and Telecompressor Corrector (#1405333).
- Silky, smooth 2.5” Starlight Instruments Feather Touch focuser with dual-speed mechanism. The dual-speed feature is particularly advantageous for critically focusing this fast focal ratio. A digital focusing system is available for imaging.
- Rotating focuser enables you to frame your photos for optimal, artistic composition.
- Compact, lightweight tube assembly travels easily in its Pelican Air case.
- Fully retractable, felt-lined dew shield slides to its fully-extended position and then secures in place.
- Latest multi-coating technology will provide optimum light transmission.
Optical Design
Roland Christen's air-spaced 3-element lens has broad band multi-coatings on all surfaces. Optimization was chosen for the polychromatic Strehl ratio to be above 90% for the entire visual spectrum with a peak value of 99.8% at the visual peak. The focus variation (the color longitudinal error) is less than +/- 0.003% between the wavelengths 656 nm to 436 nm (c to g wavelength).
The result is unprecedented color correction. Visually the scope shows sharp contrasty images without color fringing with well-corrected high-power oculars.
The Mach2GTO or Mach1GTO (no longer available) German Equatorial mounts are recommended for visual observation or astro-imaging.
What's included
- Tube Assembly with Starlight Instruments' 2.5" FeatherTouch Focuser, Dew Shield and Dustcover
- 2" and 1.25" Adapters
- Mounting Rings and V-Style Dovetail Bar
- Pelican Air 1525 Carrying Case with TrekPak Dividers
For further information and useful accessories about the 92mm f6.65 Stowaway Refractor please visit the Original Website of Astro-Physics.
Read here our blog about "Why an oil-spaced triplet-lens?"
Useful, complementary accessories
- Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp (#2456117 , € 505,-)
- Mark V Großfeld (Giant)-Binocular (#2456410 , € 1425,-)
For sun obervation:
- Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic) (various versions available)
- ASTF: AstroSolar Telescope Filter OD 5.0 (80mm - 280mm) (various versions available) (ASTF 80mm)
- ASSF: AstroSolar Spotting Scope Filter OD 5.0 (50mm - 150mm) (various versions available) (ASSF 100mm)
Special photographic accessories
Field flattener design
The optional field flattener design (#1405342) achieves wide band color correction that extends into the violet regions with diffraction-limited performance designed for the most demanding modern astronomical cameras. This is especially important for the latest CMOS chips which have their highest sensitivities in the violet part of the spectrum and will show large blue halos with lesser optical designs. The 92 mm with dedicated field flattener produces sharp images at all wavelengths without blue halos or bloated stars.
0.8x Focal Reducer
The 0.8x CCD Telecompressor for 92mm Stowaway (#1405333) is used to provide 0.80x image reduction while correcting the field curvature that is inherent in all refracting telescopes. It will provide pin point stars to the very corners of an APS-C camera sensor. It has a corrected image circle of approximately 40 mm.
Astro-Physics produces adapters for the popular Canon EOS and Nikon DSLR cameras (AP DSLR 25EOS) and Nikon (AP DSLR 25NIK).
The technical data of image field flattening and Focal Reducer
Photographic field with dedicated Field Flattener - Unvignetted image circle: 50 mm diameter
- 35 mm format: 3.2 x 2.2 degrees
- Focal ratio: f/7
- Focal length: 644 mm
- Backfocus Spacing: 2.52" (64.1 mm)
Photographic field with 0.8x Telecompressor Corrector - Unvignetted image circle: 40 mm diameter
- 35 mm format: 4.2 x 2.9 degrees
- Focal ratio: f/5.3
- Focal length: 488 mm
- Backfocus Spacing: 2.52" (64.1 mm)
Photographic field with 2x Barlow - Image circle: 32 mm diameter, 1.2 degrees
- Covers APS format
- Focal ratio: f/13 @ 90 mm backfocus
Related Articles
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Astro-Physics – High-end German Equatorial Mounts
HIGH-QUALITY PROFESSIONAL ASTRONOMICAL MOUNTS Keeping to the same quality standards that have made the fully-apochromatic refractors legendary, Roland Christen's company has been building German Equatorial GoTo mounts for more than three decades. Their proven stability, accuracy and durability is the reward for anyone who can endure the traditionally long delivery times. Two "el Capitan" mounts are working in the Antarctic for several years now, even at temperatures of -75°C. They are perhaps the most spectacular example of the durability of the sturdy Astro-Physics mounts and are representative for many more exemplars that often run for decades at our customers without failures. With a very accurate manufactured worm gear the Astro-Physics mounts are equally well-suited for smooth, effortless tracking of celestial objects as well as for all visual and photographic purposes. Astro-Physics supplies 4 mounts with 30kg to 135kg instrument load. The GTO 1100 and GTO 1600 series are especially remarkable, because they are fully transportable - despite their high instrument load. This is possible because the declination axis can be separated from the rest of the mount. Even the GTO 1600, with 90 kg instrument load, can be transported and set up by one person! The connection of the two...
Additional Information
| General | |
|---|---|
| Manufacturer | Astro Physics |
| SKU (#) | 1400092 |
| EAN Code | 4047825041197 |
| Optics | |
| Optical Design | Apochromatic Refractor |
| Aperture (mm) | 92 mm (6.65") |
| Focal Length | 612 mm (24.1”) |
| Focal Ratio | f/6.65 |
| Backfocus | 160mm (6.3") |
| Optical Coatings | Multi-layer, broadband, overall transmission greater than 97% in peak visual wavelengths |
| Magnification (x) | 18x to 360x |
| Tube diameter (max) | 3.62” |
| Tube (Material) | Cream white, 3.62” diameter, machined aluminum tube, fully baffled, flat black interior, engraved retaining ring. |
| Optical length (mm) | 19.5” (495 mm) with dew shield fully retracted; 21.75” (553 mm) with dew shield fully extended. |
| Optical Tube Weight | 7.1 lb. (3.2 kg) with dust cap |
| Mount | |
| Mount Type | Astro-Physics Mach2GTO wird empfohlen |
| Included Items | |
| Focuser | 2,5" I.D. Starlight Instruments FeatherTouch Focuser with rotating collar, rack and pinion, Feather Touch Micro 9:1 dual-speed reduction, 3.5” travel. Focuser drawtube features millimeter focusing scale. |
| Included Accessories | 2” and 1.25” adapters included, Pelican Air 1525 with TrekPak Dividers |
