Why is the Deep Sky filter the only nebula filter recommended for photography?
Lumicon recommends the Deep Sky filter because it has the widest band-width among Lumicon’s nebula filters. The wide band-width of the Deep Sky allows for shorter exposure times, which makes for easier astrophotography of deep-sky objects. This is not a recommendation against narrower band-width filters, such as the UHC or OIII, which can be used to produce higher-contrast pictures. These narrower filters are more “challenging,” however, because they require longer exposure times. If you are new to astrophotography–a difficult art–start with a Deep Sky filter. In terms of exposure time required, from shortest to longest, Lumicon’s nebula filters progress as follows: Deep Sky
