While this is true, it's better to get the alignment right and leave out the Paracorr, because even a tiny sweet spot is still huge compared to a planet. For...
Owl Services sells a 16mm 82* eyepiece in 1.25". I have the 11mm and I like it a lot. I think they are made by Moonlight. Jerry in Arizona ... From: Dave...
... I, too, have often wondered why 1.25" ultra wide eyepieces top out at focal lengths which fall well short of a 1.25" Plossl's max TFOV. Nagler and UWAN go...
... If you look at any of the eyepieces with fields of more than about 70°, you will see that they all have internal field stops. That's because part of...
Hi all, Could someone give a reasonable range for 3rd and 5th order LSA for a typical premium fast Newtonian mirror? For working purposes use 254mm f/4.5...
... In viewing deep sky objects, the most important factor is aperture: the more the better. If deep sky objects are your main interest, I recommend a minimum...
... Hi Geoff, as you know I have dark skies so I have never had to figure out how to darken things down. What would be your suggestion for someone say, in...
From: "Brian W" <mljbw2@...> ... I'll chime in here and offer the suggestion of a narrow-band nebula filter (UHC or OIII) to view emission nebulae. The...
... What I did, when I lived in downtown Toronto, was to concentrate on the things I could see: the Sun, Moon, planets, double stars, and variable stars. I...
... Hi Brian, If I lived in a location where it was not easy to access dark skies, I would tailor my astronomy goals to focus only on target types which were...
... From the excellent article at http://www.astronomy-education.com/index.php?page=191 . Clear skies, David [Non-text portions of this message have been...
The Televue 13mm Ethos is a duelly and a truly awesome lens. I haven't run the numbers but the TFOF would be close to your plossel. I had all of AL's Naglers...
Hello Everyone For the purposes of astrophotography, I've decided to buy an additional scope with 1)More apeture and 2)an equatorial mount (my present scope is...
... Years ago, when I was living in Montreal, I was quite startled to discover a bamboo plant about 7 feet tall growing in my back yard. I don't think it...
If you want to go the SCT route, perhaps you could consider the HyperStar lens. It converts the SCTs from f/10 to f/2, thus reducing the demands on the mount....
My budget range is $1500-2000...beyond that I need special permission from my wife that will require serious negotiations and probably compensation!...
Watch out, this stuff can spread like wildfire and is hard to get rid of. It will grow in temperate climates, dying off in winter and returning in spring. It...
... My last house in Toronto had a cedar hedge around most of the yard, and this turned out to be a wonderful "astronomical accessory." It absorbed stray...
Hi Anthony, There has never been a better selection of eyepieces with good performance for the dollar. One rule of thumb still applies, eyepieces with...
... The problem with this and similar telescopes is its extremely short focal ratio, which puts severe demands on eyepieces. The only company which guarantees...
I asked this question before but my computer crashed before I could retrieve the responses. So please excuse me for asking again. Garden and street lights in...
Rex De Silva
caranx@...
Jul 4, 2009 12:44 pm
136134
Yikes! That would be a broadband emission and light pollution filters may not have tremendous effect. If you can borrow a narrowband or line filter, such as...
I have asked the same questions. I have a 10 inch Zhumell dob as well as several other scopes. I even bought a TeleVue Genesis recently. What I use and have...
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