A Lesson Learnt

[DRCORTEX (Lance)]

Originally Posted by RAJAH235

Lance, What size finder do you have, 8 x 50 or so? To illuminate your X hairs, see attached. HTH... L.
ps. Lesson 1 = Don't skimp on E/Pcs.....

Nice, wish I'd seen that before I bought the "telrad" clone.

Lance

[DRCORTEX (Lance)]

Thanks for all advice. My advice to myself now is - see before you buy. I think I'll simply ask my comrades in arms to lend me there Ep's for a few minutes during a session, and satisy myself.


Never know, one I do really like might cost me less than I thought.

Edit: I ended up getting a 2" Synta 42mm WF $49 down from $100 - I shouldn't have any problems with this one. It really is for DSO objects, which my scope seems to handle pretty well. Yeah, yeah, I know, I contradicted myself. I just couldn't help myself, like a kid in a lolly factory. When I have the cash for the scope I really want, the good EP's stay, the other go with my old scope, assumeing I eventually do sell it.

Lance

[mickoking]

Originally Posted by DRCORTEX

Thanks for all advice. My advice to myself now is - see before you buy. I think I'll simply ask my comrades in arms to lend me there Ep's for a few minutes during a session, and satisy myself.


Never know, one I do really like might cost me less than I thought.

Edit: I ended up getting a 2" Synta 42mm WF $49 down from $100 - I shouldn't have any problems with this one. It really is for DSO objects, which my scope seems to handle pretty well. Yeah, yeah, I know, I contradicted myself. I just couldn't help myself, like a kid in a lolly factory. When I have the cash for the scope I really want, the good EP's stay, the other go with my old scope, assumeing I eventually do sell it.

Lance

Good onya that's wot its all about.

Clear skies

[janoskiss (Steve H)]

Originally Posted by DRCORTEX

Nice, wish I'd seen that before I bought the "telrad" clone.

Don't worry. Illuminated cross-hairs are no replacement for a telrad, which is a 1x ("naked eye") finder . Nice to have the illuminated finder as well, though. You cover the whole range with: telrad -> finder -> wide TFOV EP -> close-up EP

[Argonavis (William)]

Originally Posted by ausastronomer

The 27mm Panoptic does not suffer from Kidney beaning or blackout, I own 1 as well. The Pentax XW's are exactly the same, they have 20mm of eye relief and you need to use it, if you get too close they blackout as well. Back off that 27mm Panoptic a fraction and you should be fine. CS-John B

John

What is the difference between kidney beaning and blackout?

[janoskiss (Steve H)]

As I understand it, kidney beaning is (partial) black-outs due to sensitivity of the EP to eye placement perpendicular to the optical axis (e.g., sideways head movements). Plain old black out is due to sensitivity to eye placement along optical axis (eye too close to or too far from lens).

[ausastronomer (John Bambury)]

Steve,

You have hit the nail on the head. However, lots of people use either term to describe both effects including me. Caused by spherical aberration of the exit pupil.

CS-John B