Celestron T-Adapter Edge HD 9"/11"/14"
The Celestron T-Adapter Edge HD 9"/11"/14" is used to screw a single reflex camera -fitted with a T-thread adapter- onto the telescope tube, enabling you to photograph in the primary focal point (without eyepiece). This way, your telescope acts as a telelens. It is also possible to photograph with an eyepiece. This is called eyepiece projection. Do take into account, however, that the shutter time increases dramatically this way.
Longer and shorter shutter times
A T-adapter enables you to attach your 35mm SLR camera onto the primary focus of your telescope or spotting scope. This is done in photography with shorter shutter times, such as terrestrial photography, lunar photography and planetary photography. This kind of photography can also be used for longer exposure and deep-sky photography when using a separate finder. Both a T-adapter and a T-ring need to be used to mount a 35mm DSLR camera onto your optical instrument.