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I am thinking of buying a 2" diagonal for my C8SE.
Mr google informs me as follows but would be interested in peoples view ?
Obviously plenty of discussion around vignetting below but my eyepiece range tops out at at a Hyperion 31mm anyway.
Pros of a 2" Diagonal on a C8:
Wider apparent field of view:
2" eyepieces offer larger apparent fields of view than 1.25" eyepieces, allowing you to see more of the sky at once.
Potential for more comfortable viewing:
Some find the larger field of view of 2" eyepieces more comfortable to use, especially for extended viewing sessions.
Cons of a 2" Diagonal on a C8:
Vignetting:
The C8's baffle tube is not designed to fully illuminate the field of view of the widest 2" eyepieces, leading to vignetting (darkening of the edges of the field) with some eyepieces.
Slightly increased focal length and potential for spherical aberration:
The longer light path introduced by a 2" diagonal can slightly increase the focal length of the telescope and potentially introduce a small amount of spherical aberration, though this is often minor.
Increased back focus:
The primary mirror may need to be adjusted to compensate for the longer light path, potentially affecting the optimal focal length and introducing spherical aberration.
Thanks
Ewen
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