Eyepieces

[sjs42]

I bought the 2" orion optiluxe eyepiece and I was told that it is identical with the U/O 32mm Konig 2" eyepiece, and that they are made in the same factory. Is this true? I note that the Konig is said to have a 60 degree field of view while the Orion is advertised as having a 58 degree field of view.

Steve Shlafer

[Dave Mitsky]

That is the rumor. It is not unusual for an OEM to manufacture optics that are rebadged and sold by a number of different companies.

Dave Mitsky

[MAN]

hi all ;)

hope you can advice me please? it might be a simple request, but i
recently bought a skywatcher 6'' f/5 750 reflector. it came with 2
eyepieces 10..25'' i got no barlow.

what im asking is...which other eps i can get for this scope. im
gonna get a barlow for it soon maybe a x2? someone here might have
the same scope that can put me wise?

its a nice scope only 6 inches, but i would like to get the most out
of it. its limit magnification is 300x, although i dont need that
much. i mainly use it for deepsky objects. but think i could do with
more eyepieces.

thanks for your time

clear skies to you all :rolleyes:

[gavwvin]

Perhaps an even wider one... maybe 40mm- this would make it very easy to find objects and give you a lovely wide view for things like the pleiades. You're high-magnification needs will be cared for by the barlow, as your 10mm will act like a 5, giving you 150x magnification.

[MAN]

thanks gavwvin ;)


good idea that...getting a 40mm. like you said also when i get the barlow it will double my magnification on the 10mm.

thats enough magnification for me 150x. realy i wouldnt that much for dsos less power is the best in my opion. but use big power for the planets :D


thanks again gavwvin :)

[Dave Mitsky]

A 40mm eyepiece will produce an overly large exit pupil of 8mm (40/5) with an f/5 scope. Not all of the light emerging from it will be able to enter your eye pupil, effectively stopping down (i.e., reducing) the aperture of the telescope. Another reason not to get a 40mm Ploessl is that the apparent field of view is only about 43 degrees. A 32mm Ploessl has the same field stop diameter of 27mm (the maximum possible with a 1.25" barrel) and will produce essentially the same true field of view as a 40mm but with a 50 degree AFOV and greater "contrast" due to its higher magnification.

Dave Mitsky