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Re: Salisbury / Naglers / Ethos' - how I resisted !
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Default Re: Salisbury / Naglers / Ethos' - how I resisted ! - 17th June 2009, 10:31 PM

Quote:
I was amazed at what I had been missing.
That's the bit that frighten's me.

Up to now, I've not spent a whole lot of ££ on EP's and Andrew* + many others have given me heaps of advice that basically translates to:- "Don't mess about, just go for the Nagler, Pentax, Baader Aespherics etc.."

Now, centre field, a couple of published reports out there talk of "not much difference" between your el-cheapo Moonfish and the Naglers but off axis and edge of field they all say that the Naglers / Ethos' / Pentax' are virtually coma free - that's brilliant but now comes the hard bit. Is all that Coma really causing me grief ?

If I'm imaging then yes of course, but visually, how often do I actually find an object and deliberately put it at the outer edge of the FOV to view it ? Never. We nearly all put that object smack in the centre and observe.

The only major plus I can imagine is that the coma free wide FOV means you can actually spend more time looking @ objects rather than "dobserving / nudging". Therefore in this way you might see more of the object.

Also, being quite a decent engineer, I cannot help thinking that 8 bits of glass simply must attenuate all those faint photons more than 4 or 5. Are the laws of physics different for Televue ?

Anyhow, I'm most likely very wrong on all this, and one look through an Ethos is going to make me faint and reach for the rip-cord on my wallet.


Steve

Cheltenham, UK
16" Lightbridge f4.5 dobsonian reflector
12 x 50 binoculars

"The older I get, the fitter I was"
Swim, Bike, Run - right in the 2010 season as we speak


Steve Darnell
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