This Coronado 90mm F/8.9 refractor is equipped with a 90mm external hydrogen - alpha (H-α ) filter and features a <0.7Ã… bandpass and a 30mm blocking filter. What makes the SM3 standout? Read on!
Description
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").
Warranty note: Limited Warranty against defects in materials or workmanship for five years from date of purchase. This warranty is provided by Meade for the benefit of the original retail purchaser only. For complete warranty details contact Meade at 800-626-3233.
Quick Overview
- Fully integrated 90mm f/8.9 H-alpha telescope
- 800mm focal length
- f/8.9 focal ratio
- Includes Coronado's patented RichView tuning system
- Includes Sol Ranger viewfinder
- Single-stacked for <0.7Å bandpass and 30mm blocking filter
Specifications
| Best for viewing |
Solar |
| User level |
Advanced
|
| Optical design |
Refractor |
| Optical diameter |
90mm |
| Focal length |
800mm |
| Focal ratio |
f/8.9 |
| Coatings |
Fully multi-coated |
| Eyepieces |
Cemax 25.0mm (1.25") |
| Magnification with included eyepieces |
32x, 67x |
| Resolving power |
1.28*sec |
| Lowest useful magnification |
13x |
| Highest useful magnification |
180x |
| Highest useful magnification |
180x |
| Limiting solar magnitude |
12.4 |
| Optical quality |
Diffraction limited |
| Finder scope |
Sol ranger |
| Focuser |
2" dual-speed Rack-and-pinion |
| Diagonal degrees |
1.25" 90° Blocking Filter Blocking Filter |
| Mount type |
Optical Tube without Mount |
| Tube material |
Aluminum |
| T-max tuner |
Yes |
| Additional included accessories |
- 12mm, 18mm, 25mm Cemax eyepieces
- 2x Cemax Barlow
- Sol ranger solar finder
- Hard case
- 30mm blocking filter
|
| Other features |
- Single-stacked etalon for <0.7 angstrom bandpass
- Dual-speed focuser
- Vixen dovetail bar
|
| Warranty |
Five year |
