Astronomy Technologies 2" Dielectric Mirror Diagonal with Compression Ring AT2D

Astronomy Technologies 2" Dielectric Mirror Diagonal with Compression Ring AT2D
by Astronomy Technologies
Date first available at Amazon.com: August 23, 2011



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Review & Description

This 2" Astro-Tech first-surface mirror star diagonal has state-of-the-art 46-layer dielectric mirror coatings for a full 99% reflectivity, higher than the 88% of a conventional aluminum diagonal or the 97% of an easily-tarnished silver diagonal. The durable ion-deposited dielectric coatings on the mirror's finely-polished 10mm thick BK7 optical glass substrate also provide higher contrast and resolution during critical planetary, lunar, and binary star observations. This Astro-Tech diagonal is, quite simply, unique among premium-quality 2" star diagonals for its exceptional value.

The mirror housing is precision-machined from solid aluminum, rather than simply flimsy plastic or a sheet metal stamping, as you'll find with ordinary diagonals. A rigid U-shaped die-cast metal backplate with stainless steel hardware holds the mirror in perfect optical alignment in the machined body. The solidity of the construction is mirrored in the diagonal's substantial 17 ounce weight. The interior of the body is lined with light absorbing materials, in addition to being anodized an antireflective matte black. The 2" focuser-side barrel is also anodized antireflective matte black, and is internally antireflection threaded for even higher contrast. The barrel is threaded to accept standard 2" filters.

Rather than using a metal thumbscrew that contacts eyepiece barrels directly and can scratch them, the diagonal's 2" eyepiece holder uses a non-marring soft brass compression ring to secure 2" eyepieces and the standard equipment 1.25" eyepiece adapter in place. The knurled and chromed thumbscrew that operates the compression ring is a full 1/2" in diameter, twice that of competitive diagonals. This provides a sure grip in cold weather when wearing gloves or mittens. A slanted groove cut into the outside of the focuser-side 2" barrel engages with the scope's focuser drawtube thumbscrew to act as a safety stop. This keeps the diagonal from

Product Details

• Brand: Astronomy Technologies

Astronomy Technologies Tube Rings 124mm Pair AT124R

Astronomy Technologies Tube Rings 124mm Pair AT124R
by Astronomy Technologies
Date first available at Amazon.com: July 13, 2011



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Review & Description

These split and hinged optical tube mounting rings are made of solid aluminum, anodized black for long life. They are felt-lined and have a large hand-tighten knob to lock them on your optical tube. A heavy nylon washer prevents the knob from marring the anodized finish. The rings have a 124mm internal diameter to fit refractors with a 124mm OD tube, such as the Astro-Tech AT111ED. The rings weigh 15.2 oz. each.

There are five 1/4"-20 mounting holes on bottom of the rings for mounting on most equatorial mount dovetail plates. One hole is centered in the flat mounting boss in the bottom of each ring. It is flanked by a pair of holes on 60mm centers, and a second wider pair on 80mm centers. An identical set of five holes on the top of each ring allow installing a second dovetail plate to carry accessories. Two 7/8" long x 1/4"-20 thread hex head bolts are supplied with each ring for mounting the ring on a dovetail plate or equatorial mount using the center hole or two flanking holes.

Product Details

• Amazon Sales Rank: #1956 in Camera & Photo
• Brand: Astronomy Technologies

Barska BlackBlackhawk 18-36x50 Waterproof Angled Spotting Scope w/Tripod & Soft Carry Case

Barska BlackBlackhawk 18-36x50 Waterproof Angled Spotting Scope w/Tripod & Soft Carry Case
by Barska
(10)

Buy new: $84.99 $76.37
11 used & new from $74.89

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Review & Description

Setting the pace for design, dynamics and technical precision, Blackhawk soars high in ultimate performance. Engineered with unsurpassed optical performance and durability by those who understands the harsh hunting conditions scopes have to endure. Designed for the discriminating hunters who demands only the best. Be it a compact or a large scope that set your sights, Blackhawk spotters set the standard for portability, optical performance and value.In addition, the new Mossy OakBreak Up Camouflage model helps you blend in on your hunt! Backed by Limited Lifetime Warranty.

Product Details

• Amazon Sales Rank: #3958 in Sports & Outdoors
• Size: 4
• Brand: Barska
• Model: AD10348
• Number of items: 1
• Dimensions: 3.00" h x 6.60" w x 12.50" l, 3.10 pounds

Features

• Complete waterproof and fogproof protection for all weather conditions
• Variable zoom magnifications from 18x-36x for different applications with a glare reducing sun-shade
• Multi-coated optics and massive objective lens increases light gathering ability thus delivering brighter images in low light conditions
• Ergonomically designed with shock-absorbing rubber armor for maximum protection and enhancing overall handling
• Convenient and portable as includes tripod and soft carrying case

Baader Planetarium UV IR-Cut Telescope Filter 2" FUVIR-2

Baader Planetarium UV IR-Cut Telescope Filter 2" FUVIR-2
by Baader Planetarium
Date first available at Amazon.com: June 14, 2011

2 used & new from $99.95

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Review & Description

This filter is a must for all digital imaging with Digital Cameras, CCD Cameras, and modified Web Cams. Also useful for protecting valuable H-Alpha filters from heat stress and damaging IR (Daystar, etc). Due to their extremely high optical quality, these filters may be stacked and used far in front of the focal plane (necessary for imaging uses). Like the Baader Planetarium Contrast-Booster, the UV-IR-Cut filter uses the very latest coating technology, to deliver the finest filtration quality and lifetime durability.

Features:

Product Details

• Amazon Sales Rank: #1046 in Camera & Photo
• Brand: Baader Planetarium
• Dimensions: .75 pounds

Features

• Unmatched 98% Average Transmission! Freedom from ghost images (very low reflection multi-coating, S
• Extremely Sharp Cutoff at 680nm (leaves all the visible red, including the important 656nm H-alpha
• Sharp cutoff below 420nm. Eliminates violet halos around bright stars (more effectively than simple
• True optical quality glass substrate and coatings. Why spend all your money on quality primary optic
• Combine with any of the other Baader filters, to deliver the sharpest images possible.

Celestron 93623 Narrowband Oxygen III 1.25 Filter

Celestron 93623 Narrowband Oxygen III 1.25 Filter
by Celestron
(2)

Buy new: $106.95 $61.59
7 used & new from $59.95

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Review & Description

The OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects. Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm. This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.

Product Details

• Brand: Celestron
• Model: 93623
• Dimensions: .1 pounds

Features

• For viewing many common nebulas
• Reduces glare and light scattering
• Increases contrast through selective filtration
• Made of high quality, solid plane parallel glass with excellent homogeneity
• Anti-reflection coated to prevent glaring and ghosting

Scopetronix Maxview 14mm Wide Angle Eyepiece STWA14

Scopetronix Maxview 14mm Wide Angle Eyepiece STWA14
by Scopetronix
Date first available at Amazon.com: July 8, 2011

1 used & new from $99.95

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Review & Description

Description coming soon!

Product Details

• Amazon Sales Rank: #1895 in Camera & Photo
• Brand: Scopetronix

iOptron iEQ45 Computerized Equatorial Telescope Mount

iOptron iEQ45 Computerized Equatorial Telescope Mount
by iOptron
(1)
Date first available at Amazon.com: July 13, 2011



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Review & Description

The iOptron iEQ45 Computerized Equatorial Mount is a beast! Boasting a 45 lb payload this baby is a great choice for mounting larger telescopes. Some key features of the iOptron iEQ45 Computerized Equatorial Mount include:

The iOptron iEQ45 is the first in a new breed of premium astro-imaging mounts from iOptron. The iOptron iEQ45 Computerized Equatorial Telescope Mount offers the next generation GoTo technology from iOptron with a built-in 32-bit GPS.

With a payload of 45 lbs. balanced this mount it comes standard with a calibrated dark field illumination polar scope and a sturdy 2-inch stainless steel tripod. Given it's payload this mount is surprisingly light at only 25 lbs. which makes it easy to move around.

Features:

* Specialized astrophotography mount ideal for entry-level and intermediate astrophotographers Payload: 45 lbs * Mount weight: 25 lbs * Portable, compact, and sturdy German equatorial mount with the highest *Payload/Mount ratio (1.7) in the category * ST-4 autoguiding port capable of reverse guiding with auto-protection * Periodic error correction (PEC) * Ultra-accurate tracking with temperature compensated crystal oscillator (TCXO) * Gap-free structure for both R.A. and declination worms * Built-in 32-channel GPS * #8406 controller with Advanced GoTo Nova GoTo Technology and heating mechanism * Lowest working temperature: -20oC * RS232 port for mount firmware upgrade and ASCOM control * RS485 new command set completely open for user-defined control of the mount * Resolution: 0.09 arc second * Fits with both Vixen and Losmandy-type mounting plates * Two inch heavy-duty stainless steel tripod legs * Optional pier. * Calibrated polar scope with dark-field illumination and easy polar alignment procedure, allowing for fast and accurate polar alignment * Comes standard with: 2 x 5kg counterweight, AC adaptor, 12V DC car plug adaptor, USB cable and RS232 Cabl

Product Details

• Amazon Sales Rank: #3122 in Camera & Photo
• Brand: iOptron

Features

• Tough 45 lb weight capacity
• Sturdy 2' Steel Tripod Legs
• Vixen Dovetail Compatible
• Free Polar Finder For Easy Polar Alignment
• iOptron 8406 Go To Controller with 32 Bit GPS