With a dark sky, will a Meade 8 inch LX 90 with UHTC, (Ultra High Transmission Coatings), be enough to see some details for some of the birghter galaxies? For example, will some of the brighter spirals look like spirals, some of the brighter ellipticals look like ellipses etc.? Meade claims that the UHTC coatings increase brightness by as much as 20%, making an 8 inch equivalent to a 9.6 inch. Thanks....Mike
Galaxies
Started by Mta472, 03/05/2006 02:40PM
Posted 03/05/2006 02:40PM
Opening Post
Posted 03/05/2006 03:12PM
#1
Mike
Are you aware that you have a message inbox for communications that do not show up in a particular thread. Since you haven't responded to my e-mails I suspect that you may be unaware. Check in the left hand column of the Astromart page for "My Account" the bullet "Message Inbox" It should be red indicating you have a message.
Are you aware that you have a message inbox for communications that do not show up in a particular thread. Since you haven't responded to my e-mails I suspect that you may be unaware. Check in the left hand column of the Astromart page for "My Account" the bullet "Message Inbox" It should be red indicating you have a message.
I Yam What I Yam!
Posted 03/05/2006 11:16PM
#2
"claims that the UHTC coatings increase brightness by as much as 20%, making an 8 inch equivalent to a 9.6 inch."
I don't think anyone has addressed this yet...
Just to accurate, brightness depends on *area*, not diameter. A 20% increase in light over a perfect 8inch scope would be an 8.76inch scope, in terms of surface area.
8x8 = 64.
62x1.20 = 76.8
sqrt(76.8) = 8.76
Of course, we're actually talking about a less than perfect 8inch scope being brought closer to perfect performance, but to get an idea of what "20%" signifies, a jump from 8inch to 8.76inch is what you should be thinking.
I don't think anyone has addressed this yet...
Just to accurate, brightness depends on *area*, not diameter. A 20% increase in light over a perfect 8inch scope would be an 8.76inch scope, in terms of surface area.
8x8 = 64.
62x1.20 = 76.8
sqrt(76.8) = 8.76
Of course, we're actually talking about a less than perfect 8inch scope being brought closer to perfect performance, but to get an idea of what "20%" signifies, a jump from 8inch to 8.76inch is what you should be thinking.
Funding Member
