Quote:
Originally Posted by Kokatha man
Er, yes, Scoper; but no-one's questioning the above, that's the reality. Perhaps you could tie that into its' relationship to the question at hand?
Cheers, Darryl.  |
I thought I did that in my first post yesterday. Anyway, last night I was able to try out a couple of eyepieces and two barlows I rarely use: a generic shorty 2x barlow; a GSO 2" 2x barlow; a 25mm plossl and a 30mm superview.
In the shorty barlow the 25mm plossl did indeed exhibit increased eye relief, it was awkward to use having to hold my head away from the eyecup, however, I also noted that the field stop of the 25mm was not visible and the field had narrowed due to vignetting by the barlow. In the GSO barlow the increased eye relief effect was greatly reduced, I could still hold my eye on the eyecup but only just, there was also a small amount of vignetting in this barlow. The 30mm superview retained its eye relief in the GSO barlow as far as I could tell with no noticeable difference with or without the barlow; also there was no vignetting in the superview.
I did this test at 2 AM after working an evening shift and I admit that tiredness and hasty set-up mean that this is a tentative result. I hope to test and measure the results again when time permits.
Cheers
Malc