TAKAHASHI has just introduced 3 element ED flat-field correctors for their Mewlon 250 and 300 Telescopes. These proprietary correctors eliminate coma and flatten the field plus reduce the f-ratio slightly for both aperture Mewlon scopes. Each has been designed to be both a visual and imaging corrector, The corrector is part of the baffle tube assembly which is easily switched out by the user with older units (the Takahashi Mewlon 250 CR Corrector is designed to work with every Mewlon 250 and Mewlon 300 ever made).
Wide field oculars and medium format CCD cameras will perform superbly as the Mewlon CR produces a 44mm flat field image for CCD and DSLR users. With this corrector, the original focal length becomes shorter (2500mm instead of 3000mm).
A 0.73x reducer and 1.5x extender (both shown above) are also being introduced to further enhance the performance of the Mewlon CR corrector. With the addition of these optional accessories the Mewlon can be viewed as a tri-focal device with the corrected fields at three different focal ratios.
- Mewlon-250 CR corrector
Effective focal ratio f/10
Effective focal length 2500mm
Image circle 40mm diameter
- Reducer CR 0.73x
Effective focal ratio f/7.3
Effective focal length 1825mm
Image circle 35mm
- Extender CR 1.5x
Effective focal ratio f/15
Effective focal length 3780mm
Image circle 44mm diameter
- The Mewlon 250 Corrector is a 3 element ED Corrector for the TAKAHASHI Mewlon 250.
- The Mewlon 250 Corrector eliminates coma, flattens the field and reduces the f-ratio slightly for each.
- The Mewlon 250 Corrector was designed to be a visual and imaging corrector.
- Effective focal ratio f/10
- Effective focal length 2500mm
- Image circle 40mm
- Back focus 180.5 0.92º
- Metal back distance** 115.5mm
** Optimum imaging BACK FOCUS as measured from the rearmost surface of the optical device used that will make contact with the next adapter in the imaging train. [This is a critical distance for optimum imaging]
|Name||Takahashi - Mewlon-250 CR Corrector|