erick
16-11-2007, 09:51 PM
Does anyone have experience of this adaptor?
http://www.myastroshop.com.au/products/details.asp?id=MAS-173
Though I've been using my scope for months now, I still have trouble inverting everything in my brain when going from charts to sky to scope. For an obvious target, it's not a problem, but for a faint or small target, I really need a good "picture" of the starfield. I really struggled the other night trying to get onto the Saturn Nebula which, as I recall, was in a pretty non-descript starfield. I wonder whether this adaptor will make my life a lot easier when I'm searching through the stars and comparing to charts and binocular view? The object would be to find the target, then pull the adaptor out and work without it to study the object with selected eyepieces.
I'm guessing the main disadvantage would be additional surfaces/lenses leading to light loss and possible reflection problems? What does it do to the apparent field of view of an eyepiece, say my 32mm TeleVue plossl (50 deg) which would probably be the 1.25" eyepiece I would be using with this adpator to find objects?
I do like the idea of trying it with terrestrial viewing and the Moon. I notice that the advertising specifically does not mention anything else in the sky. Is it is completely unsuitable for astronomical purposes, even for the purpose I propose for it?
Thanks
Eric
http://www.myastroshop.com.au/products/details.asp?id=MAS-173
Though I've been using my scope for months now, I still have trouble inverting everything in my brain when going from charts to sky to scope. For an obvious target, it's not a problem, but for a faint or small target, I really need a good "picture" of the starfield. I really struggled the other night trying to get onto the Saturn Nebula which, as I recall, was in a pretty non-descript starfield. I wonder whether this adaptor will make my life a lot easier when I'm searching through the stars and comparing to charts and binocular view? The object would be to find the target, then pull the adaptor out and work without it to study the object with selected eyepieces.
I'm guessing the main disadvantage would be additional surfaces/lenses leading to light loss and possible reflection problems? What does it do to the apparent field of view of an eyepiece, say my 32mm TeleVue plossl (50 deg) which would probably be the 1.25" eyepiece I would be using with this adpator to find objects?
I do like the idea of trying it with terrestrial viewing and the Moon. I notice that the advertising specifically does not mention anything else in the sky. Is it is completely unsuitable for astronomical purposes, even for the purpose I propose for it?
Thanks
Eric