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"Many eyepieces have an eye relief (distance of exit pupil from eye lens) that is directly related to its focal length. For example, the eye relief of a Plössl is 0.73 × its focal length. Thus, with these eyepieces, for a given magnification there will be greater eye relief with a barlow than without."
The above is taken from Scoper's link - I'm not picking on you Scoper (glad you're part of this thread actually) but it does say that.
Which is to say that this thread is absolutely contradictory: or at least darn confusing!!??!!
No offence to anyone here - but jist wot is we sayin???
Regards, Darryl.
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