Optolong H-alpha Filters

Optolong H-alpha filters are designed to isolate the hydrogen-alpha (Hα) emission line, which is a common target for astrophotography. These filters allow for detailed imaging of emission nebulae, as well as other objects that emit in the Hα spectrum. The H-alpha filters are available in different sizes to fit a variety of telescope and camera setups. They are also available in 7nm and 12nm bandwidths for narrowband imaging.

Features of Optolong H-alpha Filters

Optolong H-alpha filters are made of high-quality Schott glass with multiple layers of anti-reflection coating for optimal performance. The filters have a narrow bandwidth of either 7nm or 12nm, which allows for capturing high contrast and detail in Hα emission nebulae. The H-alpha filters are available in various sizes, including 1.25", 2", and 77mm for DSLR cameras.

Using Optolong H-alpha Filters for Astrophotography

To use an Optolong H-alpha filter for astrophotography, you'll need a telescope or camera lens that can accommodate the filter size you've selected. The filter is placed in front of the camera sensor or eyepiece to isolate the Hα wavelength range. You'll also need to use longer exposure times to capture the faint Hα emission. These filters are particularly useful for imaging emission nebulae, such as the North American Nebula or the Rosette Nebula.