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- My experience using two 80-millimeter long-focus refractors
- GSO 8-inch TRUE CASSEGRAIN
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CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.
Dec 11 2009 11:15 AM | Guest in Astronomical Filters
The first thing I looked at was Jupiter with my 2" 30 mm eye piece which provides 50X power. . First I looked at it with
Author name: Williard Champagne
Dec 28 2009 12:00 PM | Lord Beowulf in Astronomical Filters
The Zhumell SEE IT ALL Telescope Filter Set consists of four filters, a Sky-Glow filter, a UHC (Ultra High Contrast) filter, an O-III filter, and a
Author name: Michael Foegelle
Dec 21 2009 11:29 AM | Dave G in Accessories
he first thing I would like to comment on is the fit and adjustability. I have a 34 inch waist and I have found the case to fit
Author name: David Gray
Mar 12 2005 11:18 AM | asaint in Cleaning Accessories
"Where have you been all my life!"
Author name: Allister St. Claire
Mar 12 2005 05:18 PM | Gary BEAL in Astronomical Filters
I have been thinking for some time now to share my experiences with the selection of filters designed and manufactured by Zeiss. It has taken some years to acquire these filters, and while not a prolific filter user it is nice to get them out and give them some fresh air every now and then. They are all designed for the Zeiss
Author name: Gary Beal
Feb 06 2006 02:00 AM | Shadowalker in Focusers (Electric and Manual)
Not long ago I purchased a Hardin 12 inch F5 Dobsonian.
Author name: Tom Nicolaides
Mar 22 2006 01:32 PM | Guest in Focusers (Electric and Manual)
I will readily admit to being a novice stargazer
Author name: Steve Maddox
Apr 04 2006 02:03 AM | Silicon Owl in Star Diagonals
Out of focus stars seemed a little odd but I couldn't quite determine what was wrong, in focus the stars were sharp until near the edge, but that I expected with the short focal length telescope
Author name: Andrew Cooper
Dec 20 2005 01:52 AM | timmbottoni in Focusers (Electric and Manual)
The quality of a telescope is often first judged by its optics, but other parts of the telescope play an important role in the user's satisfaction with the scope.
Author name: Timm Bottoni
Dec 18 2009 11:02 AM | Chris McCubbin in Green Lasers
The Core is a 532nm laser at 5mW, the legal limit for consumer GLP's. The laser comes in a
Author name: Chris McCubbin
Mar 12 2005 11:13 AM | rmollise in Focusers (Electric and Manual)
Crayford focusers, those no-gear super-smooth wonders so favored by the Big Dob folks, have finally started to make their presence known in the SCT community. Now, why would a Schmidt Cassegrain owner want a Crayford focuser? SCTs have built-in focusers that focus the telescope by moving the primary mirror. Why the H - E Double Ell would anybody bolt an additional focus unit onto the back of the SCT rear cell?
Author name: Rod Mollise
May 31 2008 01:42 AM | Jerry Hyman in Accessories
This review concerns my quest for a secure way to mount my ota's to my Vixen Super Polaris gem mount and my Super Polaris Deluxe
Author name: Jerry Hyman
Dec 03 2006 04:17 AM | Guest in Accessories
I hate set screws. Set screws have a tendency to mar any equipment that they are tightened into like a diagonal or nose piece.
Author name: James Welisek
Nov 19 2005 06:27 AM | Chris Lord in Binoviewers
To compliment my TEC140APO and enhance my visual H-alpha work I decided to invest in a high quality bino-viewer
Author name: Chris Lord
Mar 12 2005 10:40 AM | David Knisely in Astronomical Filters
The broad-band "Light-pollution Reduction (LPR) filters are designed to improve the visibility of a variety of Deep-Sky objects by blocking out the common Mercury vapor, Sodium, and some other emission lines from man-made or natural sources which contribute to light pollution, while letting through a broad range of other more useful wavelengths. Since the eye is mainly a "contrast detector", this selective screening out of some of the background skyglow increases the contrast and helps Deep-sky objects stand out more noticably.
Author name: David Knisely
Dec 08 2005 03:17 AM | Starman1 in Observing Domes, Tents, and Panels
It is a hand-held sky brightness measuring meter that gives a reading of the night sky's brightness in magnitudes per square arc-second
Author name: Don Pensack
Mar 12 2005 12:29 PM | Dave Novoselsky in Cases
Sometimes your friends turn you on to some really good ideas. I bought a 203mm f/9 Apochromatic Refractor from Tom Back at TMB Optical. It was delivered to me by Tom at Astrofest this year, in its original shipping case (i.e. a cardboard box.) Tom said Markus was going to look into a case for it, but the cost of having one built in Germany and then the cost of shipping it here seemed prohibitive.
Author name: David A. Novoselsky
Dec 10 2009 07:24 AM | arpruss in Accessories
This keychain red LED flashlight costs 44 cents at dealextreme.com, shipped, except that one has to buy it in a pack of ten for the whopping price of $4.42 (shipped)
Author name: Alexander Pruss
Mar 09 2005 02:51 PM | rmollise in Binoviewers
By way of background, before I had the chance to test the 2" Denkmeier, I was not much of a fan of binoviewers in general. I had never had much success using them. I couldn't ever seem to completely merge images, and the resulting eyestrain and headaches meant I avoided them like the plague. However....
Author name: Rod Mollise
Dec 29 2009 07:42 AM | Guest in Accessories
If you are a complete beginner like I was you will realize that this is very easy and requires no compass of course. About a minute into your first observing session you will be able to
Author name: Roberto Valladares
Sep 06 2005 06:26 AM | Michael Morris in SCT Specific Accessories
The book consists of a series of 16 simple line drawings showing the outlines of all the major and interesting features that can be seen by the visual observer with a small telescope under good seeing conditions.
Author name: Michael Morris
Mar 11 2005 05:28 AM | rmollise in Abberation Correctors
Spherical aberration is something that troubles amateur astronomers no matter which design of scope they use. In any telescope, if the objective, primary mirror, or combination of lenses and mirrors yields a final image that is too much like what is produced by a spherical mirror or lens, you’ve got Big Problems in River City. All rays of light will not come to focus at the same point, meaning your images are not and never will be sharp.
Author name: Rod Mollise
Dec 23 2009 08:40 AM | dpforward in Accessories
Three adjustment screws allowed for very easy alignment with my scope's field of view. To align the Telrad, I simply aligned my scope on a
Author name: Paul Forward
Jan 06 2010 11:14 AM | jcely7 in Accessories
The aspect of zero magnification can serve multiple purposes. The first is that it can quickly get you in the general area of your
Author name: Justin Ely
Dec 21 2009 11:10 AM | John989 in Accessories
Mounting is pretty simple, using double sided tape that is pre-applied to the Telrad. Just peel off the paper strips and stick it down. I found that it's best to
Author name: John Anderson