|
Hi Guys,
thanks a lot for your comprehensive overview of the ins and outs.
Alexander, your essay on eyepieces is a real eye-opener. It should be up in the stickies. I could imagine that I am not the only one wondering which piece of glass works best.
Just one more question:
ES and others come in 1.25" and 2" barrel sizes and others have both in the same eyepiece. Does the barrel size matter then? I was reading about vignetting with 1.25" barrel sizes for wide field eyepieces and yet, the Ethos line can be inserted into a 1.25" focuser. Is it then still achieving ist claimed 100° AFOV or will there be losses whenever one chooses 1.25" over 2"?
I am leaning a lot towards the ES 82° line of EPīs but struggle to make up my mind which one to get. The 2" barrel ones appeal but I would have to get a 2" Barlow or Powermate. All of my other EPīs, filters and Barlows incl a 5x Powermate are 1.25". It would mean creating a new collection, incompatible with the others. But if the visual gain by 2" barrel size would be a big difference, then I guess I would go for it.
I have a GSO superview 30mm as well. It came with the Dob. It has a nice wide field but my suburban skies are pretty light poluted and whenever I use the 30mm I see a washed out, grey sky. The stars also seem to become comets away from the dead centre of view. I havenīt tried it with a barlow, though. Perhaps that makes it better.
|