Great quality item for the price. Well pleased and better than l expected.
It is a good solid eyepeice well made a works well. This was a replacement for an eyepeice not in stock, good customer service and postage refunded for the inconvenience.
SharpStar SCA260 V2 Aspherical Cassegrain Telescope 260mm f/5
£3,990.00£0.00
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SharpStar SCA260 Aspherical Cassegrain Telescope 260mm - Fast f/5 Optics
This is the new and improved version 2 with a better focuser
Designed with the serious amateur in mind as a large astrophotography instrument for deepsky, at the edge of portability, this fast Cassegrain is recommended primarily for astrophotography!
FOR FULL FRAME IMAGING!
This might be a good alternative to Schmidth-Cassegrain telescopes as it sits nicely somewhere between a f/10 SCT (like a Celestron 11" Edge HD) and a 11" RASA, but for a very similar cost to an 11" Edge HD you got a much faster instrument at f/5. Additional bonuses are the cooling fans and the heavy duty rack and pinion focuser, not to mention the carbon fiber tube...
SharpStar SCA260 telescope features:
• 260MM f/5 Aspherical Cassegrain optical design with triplet field flattener
• Primary mirror material: PZ33 (sma as pyrex glass)
• Secondary mirror: spherical
• Image circle: 80mm
• Tube material: carbon fiber
• Outer diameter of tube: 280.5mm
• Tube length: 712mm
• Tube weight: 15kg
• Resolution: 0.46
• Focuser: 3.2 inch
• Visual limiting magnitude: 13.8
• Back focus: 75mm (calculated from the end of M48 thread)
The SharpStar SCA 260 is a beautifully designed unique optical instrument from Sharpstar!
Sharpstar-optics is excited to launch their newest telescope, an Aspherical Cassegrain OTA SCA260 with short focal ratio. The primary mirror is aspherical with a more complicated grinding task that is reflected in the price. Testing requirements are also more complex than traditional primary mirrors. Its carbon fiber tube is lightweight, durable and nice looking, and the use Pyrex-like materials provides a better controlled quality than traditional materials.
The primary and secondary mirrors are all made with enhanced aluminum coating, and the reflectivity is guaranteed to be above 95%. The secondary mirror has a new lever adjustment function that can be moved in a horizontal position. The 3-inch dedicated focuser ensures smooth operation without slipping when taking photos with heavy accessories.
All CNC aluminum parts and novel hollow handles can be connected to different accessories. The appearance and mechanical quality are of high standards. Its design is to meet the needs of today’s demanding astronomer.
The optical path includes a triplet 3" field flattener, thus ensuring full-frame photography and vignetting control. The two M54×0.75 threads and M48×0.75 threads at the rear of the focuser can meet different needs and are convenient to connect to most commercially available imaging-terminals and help to achieve perfect focus.
The optical path includes a triplet 3" field flattener, thus ensuring full-frame photography and vignetting control. The two M54×0.75 threads and M48×0.75 threads at the rear of the focuser can meet different needs and are convenient to connect to most commercially available imaging-terminals and help to achieve perfect focus.
Specifications:
- Aperture size：260mm
- Focal length：1300mm
- Focal ratio：f/5
- Primary mirror type：aspherical reflective mirror
- Primary mirror material：PZ33(similar to Pyrex glass)
- Corrector：three-element air-spaced lens structure
- Minor axis：120mm
- Secondary mirror type：spherical reflective mirror
- Image circle：80mm
- Tube material：carbon fiber
- Tube outer diameter：280.5mm
- Tube length：712mm
- Tube weight：15kg
- Resolution：0.46
- Focuser：3.2"
- Limiting visual magnitude：13.8
- Back-focus：75mm(start from the base of the mounting thread on the housing)
User contributions:
Melotte 15 – “The Heart of the Heart Nebula”
- Subject: Melotte 15 – “The Heart of the Heart Nebula”
- Imaging OTA: Sharpstar SCA260 – 1300mm, f/5.0
- Imaging Camera: ZWO ASI2600MM-PRO
- Filters:
Antlia 2” Narrowband: Ha (3nm); Sii (3.5nm); Oiii (3.5nm) - Filter Wheel: ZWO 7 x 2”
- Guide System: ZWO OAG-L with ZWO ASI174MM camera
- Mount:
Skywatcher EQ6-R - Capture Details: Ha: 30 x 300s; Sii: 26 x 300s; Oiii: 26 x 300s
- Integration time: 6h40’
- Bortle 4 over 4 nights
Courtesy of Alistair Scobie
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