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| Filter Performance Comparisons
[Article] | 10/05/06 | by David Knisely
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| | The following is a summary report of visual observations of emission nebulae comparing the performance of various filters intended for such objects.. . . |
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| CHARTLAMP map reading light
[User Review] | 12/04/03 | by David Knisely
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| | Now comes the new
CHARTLAMP; a small fixed LED lamp on a small stand which may be of some use.. . . |
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| Sirius Optics NPC Neodymium Eyepiece Filter
[User Review] | 06/20/03 | by David Knisely
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| | Although color filters generally do have some limited applications for planetary viewing in bringing out certain detail, I have never a huge fan of them. I. . . |
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| Orion 30mm, 15mm, and 10mm Ultrascopic Eyepieces
[User Review] | 09/27/03 | by David Knisely
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| | For those on a budget, selecting eyepieces can be something of a chore. The new observer doesn't exactly want to "break the bank" for a choice set of occul. . . |
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| Useful Filters for Viewing Deep-Sky Objects
[User Review] | 04/16/03 | by David Knisely
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| | 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 . . . |
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| Lumicon Multiple Filter Selector
[User Review] | 04/16/03 | by David Knisely
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| | For those of us who have more than one filter in our equipment arsenal, it is frequently a hastle (and even a hazard) to keep screwing, unscrewing, or even. . . |
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| Tele Vue Powermate - 2.5X Barlow-like
[User Review] | 04/16/03 | by David Knisely
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| | There was a time when the negative lens system know as the Barlow lens was looked down upon by many amateur astronomers. Although they have been improved a. . . |
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| Daystar T-Scanner - 0.7 Angstrom Solar H-alpha Filter
[User Review] | 04/16/03 | by David Knisely
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| | The active face of our nearest star, the Sun, is interesting to watch with the proper white light solar filter. However, with a narrow band filter tuned to. . . |
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| CN Report: Celestron NEXSTAR 130GT
[CN Report] | 02/11/05 | by David Knisely
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| | How does the Nexstar 130 fair as a beginners scope? David Knisely finds out.... . . |
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| SKY ATLAS 2000.0 Deluxe Version, 2nd Edition
[User Review] | 04/16/03 | by David Knisely
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| | Ever since 1981, when it supplanted Becvar's ATLAS OF THE HEAVENS 1950, SKY ATLAS 2000.0 has been truly one of the "standard" wide-field atlases for the am. . . |
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| 30mm Wide Scan Type III Eyepiece
[User Review] | 09/27/03 | by David Knisely
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| | The popularity of wide-field eyepieces has surged in recent years, and, to a certain extent, so has their cost and complexity. Systems containing more than. . . |
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| Antares 5-8mm Speers-Waler Eyepiece
[User Review] | 09/27/03 | by David Knisely
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| | Good short focal length eyepieces with moderate to large apparent fields of view can sometimes be somewhat of a rarity, but such larger fields are a real n. . . |
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| Antares 24.7 mm Speers-Waler Eyepiece
[User Review] | 04/17/03 | by David Knisely
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| | Intrigued by the fine performance of the Antares 5-8mm Speers-Waler eyepiece, I decided to take a look at another eyepiece in their line, the 24.7mm Speers. . . |
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| Televue 2.5x Powermate
[User Review] | 04/17/03 | by David Knisely
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| | There was a time when the negative lens system know as the Barlow lens was looked down upon by many amateur astronomers. Although they have been improved a. . . |
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| Celestron 80MM "Wide View" Spotting Scope
[User Review] | 09/27/03 | by David Knisely
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| | There are some times when I have just wanted something to give me a quick low-power look at things when it seems too much of a bother to lug around my ten . . . |
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| STARMAX 90mm EQ
[User Review] | 01/21/04 | by David Knisely
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| | The telescope is about 11 inches long, which is lengthened to about 13 inches when the included 90 degree mirrored star diagonal is in use. The tube is abo. . . |
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| CN Report: Celestron F/6.3 Reducer/Corrector (Model # 94175)
[CN Report] | 03/13/04 | by David Knisely
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| | With many of the modern Schmidt-Cassegrain telescopes (SCTs), the longer effective focal length can
be a bit of a hastle, limiting the field of view and i. . . |
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| CN Report: Shootout of the Reticles - The Kufeld TELRAD (tm) Vs. Rigel QUICKFINDER
[CN Report] | 02/14/04 | by David Knisely
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| | The first thing I noticed was that the QuickFinder required a bit more precise positioning of the user's
eye to see the two red rings than the Telrad's re. . . |
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| CN Report: Tele Vue Paracorr - Coma Corrector for Newtonians (Visual version)
[CN Report] | 08/10/04 | by David Knisely
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| | The Paracorr comes with an 1.25" to 2" eyepiece adapter, and both the adapter
and the unit itself use non-captive thumbscrews which bear up against brass
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| Coronado "Personal Solar Telescope" (PST)
[CN Report] | 08/26/04 | by David Knisely
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| | For most observers, the sun is an interesting but rather sedate target, with little change from moment to
moment. However, in very narrow passband filters. . . |
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| CN Report: CosmicOne SCT Cooler a.k.a. THE CAT COOLER Filtered air ventilation system for SCTs
[CN Report] | 12/15/04 | by David Knisely
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| | The SCT Cooler is a fan-driven filtered ventilation system for a number of different commercial SCT's
from 8 inches to 14 inches in aperture. The unit bas. . . |
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| CN Report: The 24 Panoptic
[CN Report] | 03/22/05 | by David Knisely
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| | David Knisely takes a look at the newest Panoptic on the block, the 24mm Panoptic. The question - Is the 24 a better choice than the 22? Read on. . . |
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| CN Report: The Pentax 20mm XW
[CN Report] | 08/30/04 | by David Knisely
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| | The Pentax XW line is the succesor to the very popular Pentax XL line. David Knisley reviews the 20mm Pentax XW with 20mm eye relief and 70-deg FOV
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| CN Report: Coronado Cemax Eyepieces
[CN Report] | 11/18/04 | by David Knisely
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| | David Knisely takes the Coronado dedicated solar eyepieces through their paces
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| CN Report: Apogee Super Easy View Eyepieces
[CN Report] | 07/01/04 | by David Knisely
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| | You've seen them advertised as great planetary eyepieces with generous eye relief. David Knisely takes them for a spin and gives you the benefit of his dec. . . |
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| CN Report: NexStar 9.25GPS
[CN Report] | 03/13/04 | by David Knisely
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| | Experienced observer David Knisely was sent a new Nexstar to evaluate. At the end of 2 months, he purchased it for his own use.... . . |
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| CN Report: CapeNEWISE 8" f/6 Catadioptric Newtonian
[CN Report] | 03/13/04 | by David Knisely
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| | Instruments. Not a Mak-Newt and not an SCT-Newt but a modified newtonian catadioptric telescope. Read on to hear the experiences and subsequent journey of . . . |
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| CN Report: The Night Sky Observer's Guide
[CN Report] | 07/10/04 | by David Knisely
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| | David Knisely takes an in-depth look at this popular two-volume set. . . |
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| William Optics Swan Widefields
[CN Report] | 06/13/05 | by David Knisely
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| | David Knisely examines the entire line of WO Swan Widefields. . . |
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| CN Report: Orion Skyview Pro 100
[CN Report] | 12/15/05 | by David Knisely
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| | The popularity of moderate aperture refractors has been increasing lately. . . |
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