The Baader Methane filter is an 8nm narrowband photographic filter designed to isolate the CH4 band at 889nm. This is useful for capturing finer details and contrast on Jupiter and Saturn. As the human eye is not sensitive to light beyond 700nm, this is strictly a photographic filter and benefits from cameras with good NIR response such as the ZWO ASI662MC.
The optical surface is fine-optically polished so that there is no loss of sharpness at high magnifications, even when the filter is positioned far in front of the focal point. The filter is made from a Schott RG 830 substrate with "super stacked" dielectric coatings for pure transmission.
Available in 1.25" mounted. The filter cell is threaded on both ends so that multiple filters can be stacked. All Baader filters (excluding 100 x 100mm) come in stackable labelled filter boxes which can be attached to each other to form a sturdy filter library.
Specifications
| Transmission range | CH4 |
|---|---|
| Central wavelength | 889 nm |
| Half-bandwidth | 8 nm |
| AR-coating | Dielectric coating, planeoptically polished |
| Filter thickness | 2 mm (without cell), 6 mm with cell |
| Filter size | 1.25" mounted |
| SKU | BA2458295 |
For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.
