<https://stargazerslounge.com/topic/82057-low-profile-focuser/#comment-800287>
<http://schema.org/text>
"Or if you have some gear that requires too much focuser in-travel with your current focuser, of course. That can be an eyepiece like a Speers-Walers or more commonly a photosensor (webcam, DSLR,...) One point that people sometimes forget is that it's much easier to make a focuser baffle work well (or to make the focuser draw tube itself act as an efficient baffle) with  a focal plane that is not too close to the scope axis, which makes a \"high profile\" focuser more practical (unless like me you have a low profile focuser but simply mount if further from the axis, but that's pretty much functionally equivalent). A low profile focuser (mounted close to the scope axis) does allow you to have a larger fully illuminated field with a given secondary size (provided you also don't overdimension the tube or UTA diameter), but it's more difficult to ensure no stray light can reach the focal plane (or if you still baffle everything correctly, may mean you need a much larger light shield opposite the focuser, something that can become quite impractical). \n"
<https://stargazerslounge.com/topic/82057-low-profile-focuser/>