| Our Product #: | T2570 | | | Manufacturer #: | TBS2570 |
| Special Order: | Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering. |
 |
| The BRC-250 employs non-spherical surfaces for both the primary and secondary mirrors, and when they are combined with two supplementary lenses, elimates spherical aberration, coma, and even astigmatism with a flat field. It produces a focul ration of f/5 with a 100mm 5 degree diameter image circle. It also produces an amazing 2 micron stellar image at the center of the field. the BRC-250 employs the Baker method to flatten the field over a wide field. However, because its primary and secondary mirrors are hyperbolic, production was difficult. today, Takahashi's unique rechnique in polishing non-spherical surfaces enable the first mass production of Baker Richie Chretiens. The large 100mm diameter image makes the BRC-250 a versatile astrograph. The following formats cam be used: 35mm, 6x7, 6x9, and 4x5. The BRC-250 is temperature compensated by using a space age state-of-the-art carbon fiber tube which assures precise focaus that will not change with temperature fluctuations. The extremely small stellar images makes the BRC-250 the perfect instrument for CCD imaging. The 100mm diameter image circle will accomodate the largest commercially available CCD cameras. |
|
|
|
|
Email page link to a friend