12.5″ Imaging Harmer Wynne (iHW)

The AG Optical Systems 12.5″ F3.9 Imaging Harmer Wynne (iHW) astrograph is a premium quality ultra wide field imaging instrument featuring a 50mm flat field free from astigmatism and coma. The outstanding optical performance of the 12.5″ iHW is made possible through the use of a three element, permanently aligned field corrector combined with a low expansion substrate F3.9 optical system.   Wide field images up to 2.3 degrees are captured with high-contrast details and sharp stars across the entire field of view.

 

 

 

 

 

Objects that are too large to be captured using narrow field systems can now be imaged on a single CCD without the need to resort to complex and time consuming mosaics or very expensive large chip CCD cameras.

The Imaging Harmer Wynne carbon fiber truss optical tube assembly makes extensive use of carbon fiber composite materials, CNC-machined components, and precision collimation adjustments to provide a rigid and thermally stable platform for the low expansion substrate optics. Three cooling fans speed the cooling of the primary mirror while primary and secondary mirror anti-dew heaters can be automatically controlled by the optional Thermal Control System (TCS).

The 12.5″ iHW provides exceptional thermal stability. Low expansion optics ensure the figure and focus stability of the 12.5″ iHW as the ambient temperature changes over the course of an imaging session. When combined with the rigid, thermally stable carbon fiber truss tube assembly of the 12.5″ iWH you can expect to spend less time focusing and more time collecting data.

The optional state-of-the-art Optec Gemini rotating focuser is a perfect match to the 12.5″ iHW providing precision focusing capability, image train rotation, and heavy payload capability. The electronic control system included with the Gemini focuser allows the Gemini to be controlled by any ASCOM compatible autofocus software program.