Designed for Canon EOS & Rebel SLR & DSLR Cameras and Photography;Note:it doesnt fit for EOS-M models; connect camera to telescope for direct prime focus photography convenient and easily
Reflectors typically require a barlow lens to be placed between the adapter and focuser to extend the focus point.
Refractors typically require you to replace the diagonal with a slightly shorter extension tube to reach focus. this is true of any adapter.
most SCTs and MAKs wont require anything else
Prime Focus Application: typically used for imaging nebulae; galaxies and other large (but dim) deep sky objects
Eyepiece Projection & Variable Eyepiece Projection Eyepiece Projection is typically used for Terrestrial, Lunar & Planetary imaging and any time higher magnification is needed to bring out detail
Eyepiece Diameter: Compatible maximum eyepiece diameter is 42 mm.It can handle larger eyepieces (to 42mm Max Dia), has a handy laser engraved Extension Scale and a machined Grip Ring