Description
Highlights
- Fully integrated 90mm f/8.9 H-alpha telescope - 800mm focal length
- Includes Coronado's patented RichView tuning system
- Includes Sol Ranger viewfinder
- Single-stacked for <0.7Å bandpass and 30mm blocking filter
- Black and silver hard carry case included to protect your investment (dimensions: 26.5" x 8.66" x 8.66").
This Coronado 90mm F/8.9 refractor is equipped with a 90mm external hydrogen - alpha (H-α ) filter and features a <0.7Å bandpass and a 30mm blocking filter. What makes the SM3 standout? Read on!
Designed and Manufactured in North America.
It has a new 2" two-speed rack & pinion focuser with both coarse and fine focus controls which provide the user a more precise focus, critical for both solar imaging and visual observing.
Additionally, the SM3 90mm includes only external "True" H-α etalon filter giving higher contrast views and sharper features compared with models using smaller internal H-α etalon designs. Experience darker backgrounds, sharper features, and higher contrast with the new SolarMax III series telescope.
Also includes Coronado's patented RichView tuning allowing direct tuning of the primary etalon filter. The patented RichView tuning technology provides additional tuning range and an overall better way of adjusting the filters bandpass. Now you can tune for the highest contrast views of your favorite solar features without sacrificing image quality.
This telescope with enhanced rack & pinion focuser and large external etalon is now the perfect way to view the Sun! The SM3 90mm comes with an included 12mm, 18mm, 25mm CEMAX eyepieces, CEMAX 2x Barlow, Sol Ranger Solar Finder, 30mm blocking filter, Vixen-style dovetail mounting rail, and an all-new black and gold Aluminum Hard Carry Case (Dimensions: 26.5" X 8.66" X 8.66").
Coronado assures that all solar filters are tested at specialized labs that are accredited to verify compliance with the ISO 12312-2 safety specifications for solar viewing.
- Best for viewing
- Solar
- User level
- Advanced
- Optical design
- Refractor
- Optical diameter
- 90mm
- Focal length
- 800mm
- Focal ratio
- f/8.9
- Eyepieces
- Cemax 25.0mm (1.25")
- Magnification with included eyepieces
- 32x, 67x
- Resolving power
- 1.29arc*sec
- Optical quality
- Diffraction limited
- Finder scope
- Sol Ranger
- Focuser
- 2" dual-speed Rack-and-pinion
- Diagonal degrees
- 1.25" 90° Mirror Star
- Mount type
- Optical Tube without Mount
- Tube material
- Aluminum
- Length of optical tube
- 26.5 in.
- T-max tuner
- Yes
- Additional included accessories
- Black and gold hard carry case, Cemax 25mm, 18mm, 12mm eyepieces and 2x Barlow, BF30 blocking filter and 1.25" star diagonal
- Other features
- Single-stacked etalon for <0.7 angstrom bandpass, Dual-speed focuser, Vixen dovetail bar
- Warranty
- Five year