TAKAHASHI MEWLON 300CRS
Takahashi
Corrected Dall-Kirkham
300 mm
f/9.9
2960 mm
27 kg
TAKAHASHI MEWLON 300CRS - Complete Assembly is backordered and will ship as soon as it is back in stock.
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The Mewlon 300CRS currently has an extensive lead time. Prices may vary. Contact us for more information.
The Takahashi Mewlon 300CRS is a Dall-Kirkham reflector designed for planetary imaging and observation. The optical design combines an ellipsoidal primary mirror and spherical secondary mirror, with the surface quality of the optics being extremely accurate at λ/20.
The Mewlon CRS models have an integrated field corrector with ED glass lenses which provide a much higher corrected field than the smaller Mewlon models. This makes the 300CRS suitable for imaging of deep sky objects such as planetary nebulae and galaxies with an image circle of 40mm at prime focus.
The Mewlon 300CRS has a native focal length of 2960mm and a focal ratio of f/9.9, making it the ideal instrument for planetary use. The motorized secondary mirror allows precise focusing with either the included hand controller or over ASCOM. Additionally, the tube features three cooling fans for the primary mirror with temperature sensors both inside and outside the tube.
A 0.73x focal reducer is available (sold separately), reducing the focal length to 2160mm and focal ratio to f/7.2 for wider views and faster exposure times. A 1.5x focal extender is also available.
Spot diagram of Takahashi Mewlon 300CRS at prime focus.
Spot diagram of Takahashi Mewlon 300CRS with RD CR 0.73x focal reducer.
| Optical design | Modified Dall-Kirkham reflector |
|---|---|
| Mirror configuration |
Concave elliptical primary + convex spherical secondary + field corrector |
| Focuser |
Motorized secondary mirror focuser |
| Primary mirror diameter |
300 mm |
| Focal length at prime focus |
2960 mm |
| Focal ratio at prime focus |
F/9.9 |
| Backfocus distance at prime focus |
189.5 mm |
| Tube diameter | 324 mm |
| Tube length | 1140 mm |
| Tube weight | 27 kg |
| SKU | TLK30300 |
| Prime focus focal length | 2960 mm |
|---|---|
| Prime focus focal ratio |
F/9.9 |
| Prime focus backfocus distance |
189.5 mm |
| Prime focus image circle | 40 mm |
| RD CR 0.73x reducer focal length |
2160 mm |
|
RD CR 0.73x reducer focal ratio |
F/7.2 |
|
RD CR 0.73x reducer backfocus distance |
72.2 mm |
|
RD CR 0.73x reducer image circle |
35 mm |
| EX CR 1.5x extender focal length | 4475 mm |
| EX CR 1.5x extender focal ratio | F/14.9 |
| EX CR 1.5x extender backfocus distance | 117.5 mm |
| EX CR 1.5x extender image circle | 44 mm |
