Mensajepor oscgom » 14 Abr 2009, 04:52
hola,
me encontré estos comentarios en cloudynights, espero que se entiendan bien
hablan cosas interesantes sobre el de 8mm
I had the chance to do some viewing through the 8Ethos
with some terrestrial viewing and looking at the gibbous Moon.
the placement sensitivity I thought I had seen holding the 8mm to my eye was not at all apparent when actually using it in a telescope.
I noted that whatever is at the edge of the FOV in this 8mm, when switching back to the 13mm, that same detail is about half-way between center and the edge. The 13 was my wide-field eyepiece! :^)
Looking at a number of terrestrial objects telephone poles and related equipment mounted there, the 8mm was absolutely pin-point sharp right to the extreme edge!
Very fine detail that was at the threshold of visibility in the 13 Ethos (surface rust on nuts, texture in wire insulation, wire strand ends, etc.), exploded into grand detail when jumping up to the 8mm.
I was extremely impressed with the views as seen through the 8E. The image was essentially perfect and of reference standard quality.
I noted that I could view the entire gibbous Moon in the 8mm at 193X! Maybe not a reason to buy the Ethos but it was interesting nevertheless.
there really isn't a "sweet spot" in these eyepieces-- I mean, it really didn't matter /where/ you looked-- way up, over to the far side, or in the center-- the sharpness, contrast and resolution was the same anywhere you looked-- perfect! no need to refocus from one part of the view to another, either.
The 8mm gave me the power to see very fine detail on the Moon at the 1540mm f.l. of this scope, whether in Plato, Mare Imbrium, the region around Gassendi or the Southern high cratered areas!
As many scopes are around this f.l. (1200-1800mm), a lot of people will find the 8mm essential to their eyepiece collection.
I like to use the Ethos both as a full-view eyepiece, and also with my eye a bit farther back, giving about a 60* AFOV, to give the eye lens some space, make it a bit easier to pan around the view, and to
focus on details of things like the Moon, then move back in closer to take in the whole view at once.
I find the Ethos to be only a half a hair down in absolute performance of the Supermonocentric.
I did examine using the 8mm as a bino pair
saludos
TS130 F7 triplet apo, Skytee
Fs60c,Vixen 80M,90M, 90L, WO90 apo
Newton Vixen R100L f10+NP mount
Vixen Or40,SWA 40 68º
Axiom 31 82º
2x Swa24,Uwa18, 2xES16 68º
Ethos 21,10,8,6
2x Uwa5.5,Uwa8.8,Delos 4.5
barlows 5x, ES 3x, angeleyes 2" 2X
Swift Audubon 8.5x44ED,MkV binos