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IRDK 12.5 (Infrared Optimized)
Price: $14,000.00
The IRDK12.5 is a 12.5-inch infrared-optimized optical tube designed for research applications where on-axis performance is crucial.
- IRDK 12.5 Astrograph (320mm), infrared-optimized with quartz glass optics
- Dall-Kirkham design with a coating optimized for the transmission of infrared or ultraviolet wavelengths
- 3″ dovetail, 2,541 mm focal length (f/8)
- Hedrick focuser (without EFA kit), prepared for Delta T Heater
Specifications
Specifications
Optical System
| Aperture | 12.5 inch (318 mm) |
| Focal Length | 2541 mm (100.04 inch) |
| Focal ratio | f/8 |
| Central Obstruction | 42% of the primary mirror diameter |
| Back Focus from Mounting Surface | 10.445 inch (265 mm) |
| Back Focus from Racked in Focuser | 7.2 inch (183 mm) |
| OTA Length | 31 inch (787 mm) |
| Optical Tube | Carbon fiber |
| Dimensions | Overall Dimensions (PDF) |
| Weight (includes manual-focuser and dovetail) | 46 lbs (20.9 kg) |
| Weight (includes electronic-focuser and dovetail) | 48.5 lbs (22.0 kg) |
| Optimal Field of View | 52mm image circle |
Secondary Mirror
| Diameter | 4.65 inch (118 mm) |
| Material | Fused silica (quartz) |
| Shape | Spherical |
| Coating | Protected Gold |
Primary Mirror
| Optical Diameter | 12.5 inch (318 mm) |
| Outer Diameter | 13 inch (330 mm) |
| Shape | Prolate ellipsoid |
| Material | Fused silica (quartz) |
| Coating | Protected Gold |
Shipping
| Crated Shipping Weight | 163 lbs (73.9 kg) |
| Crate Width | 22 inch (559 mm) |
| Crate Height | 29 inch (737 mm) |
| Crate Length | 48 inch (1,219 mm) |
Included Items
Included Items
| Motorized 2.75″ Hedrick Focuser | Offers 1.3″ of focuser travel and takes up 3.25″ of backfocus. Requires the 125901 EFA kit sold separately |
| Heating elements for dew prevention | The heating pads on the primary and secondary mirror require the 600195 Delta-T controller sold separately |
| OTA Cover | To protect the primary mirror and inside of the optical tube |
| Flashdrive | Contains software and instructions for collimation and spacing the primary to secondary mirror |
| Cable connector for fan power | Provides a connection method for powering for the fans if the user does not have the 125901 EFA kit. User must provide 12VDC powersupply 2.1 barrel jack connector that is center positive. (Not included for European orders) |
| Wrench Set (5812A35) | Standard hex wrenches (European orders only) |
Recommended Accessories
Recommended Accessories
OTA Accessories
- Reducer 0.66x for CDK12.5 (125166)
- Delta T Heater (600195)
- IRF90 – Integrated Rotating Focuser*
- EFA kit Electronic Focuser (125901-KIT)
- Piggyback Dovetail CDK12.5 (125990)
- Keller EZ-Saddle (600182)
- Counterweight Accessory for CDK12.5 (125150)
*For IRDK12.5s that use an IRF90, the CDK12.5 to IRF 90 Adapter (125395) is needed.
Visual Accessories
- Finderscope Mounting Bracket (125360)
- Finderscope and Mounting Bracket (6009003)
- Visual Adapter – CDK12.5 (125399)
- 2 Inch Mirror Diagonal (DDP-8004)
Mount Accessories
Downloads
Downloads
Instructions
- CDK12.5 EFA Kit Instructions
- Piggyback Dovetail Installation Instructions (CDK12.5)
- Collimation and Spacing Instructions for CDK12.5, 14, 17, 20, and 24
- Cleaning Optics CDK12.5
Camera Adapters Diagrams
- Popular Spacer Combinations
- Adapters and Spacers for QSI Cameras
- Adapters and Spacers for DSLR Cameras
- CDK12.5 to Apogee Adapters
- CDK12.5 to FLI Adapters
- CDK12.5 to SBIG Adapters
Drawings & Diagrams
- CDK12.5 Vignetting and Spot Size Plots
- CDK12.5 Spot and Diffraction Diagram
- CDK12.5 Overall Dimensions
Software
Warranty
Warranty
For warranty information please check our Standard Warranty Page.