Canon PowerShot A3100IS 12.1 MP Digital Camera with 4x Optical Image Stabilized Zoom and 2.7-Inch LCD (Silver)

Rating: List Price: $159.00 Sale Price: $139.00 Availability: Usually ships in 24 hours Eligible For Free Shipping

Product Description

It's time for a few options outside the standard shooting modes offered by today's digital point-and-shoot cameras. It's time for the Canon PowerShot A3100 IS SL with Super Vivid and Poster Effect modes, allowing you to capture images with exceptionally vivid colors, or a high-contrast, graphic look. Capture all your shots with stunning detail and brilliant color thanks to a 12.1-megapixel capture resolution and the DIGIC III image processor. Compose and review shots using the 2.7" color LCD viewscreen, and look to optical images stabilization for sharp, blur-free photos.

Details

• 12.1 megapixels, 4x optical zoom with Optical Image Stabilizer, and DIGIC III Image Processor
• Lithium-ion battery makes the camera lighter and offers an easy alternative to recharge
• New scene modes, including Super Vivid and Poster Effect; Smart Auto selects from 18 predefined shooting situations
• Large, bright 2.7-inch LCD
• Capture images to SD/SDHC memory cards (not included)

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Vixen 2633OTA VMC200L Optical Tube Only (No Accessories)

Rating: List Price: $1,299.00 Sale Price: $1,299.00 Availability: Usually ships in 24 hours Eligible For Free Shipping

Product Description

The VMC200L is a unique catadioptric optical system. It incorporates a primary mirror and a meniscus corrector just before a secondary mirror. By doing so, light is corrected twice on the optical path. The end result is that spherical aberration and field curvature are corrected to a high degree of optical performance. The VMC200L's primary mirror is f/2.5; the compound optical system is f/9.75. This makes the system much more compact and portable than its competition. With the optical correction placed before the secondary mirror, the VMC200L avoids the necessity of having a corrector plate and all the dewing problems associated with a closed optical tube. An additional key feature is the rack and pinion focusing that is placed behind the primary mirror. The use of this focusing system eliminates the image shift associated with most other SCT systems. This is especially important when using high power magnification or astro-photography. When focusing, the image is stable and easy to adjust. Manufactured in Japan.

Details

• Rack and Pinion focusing
• Manufactured in Japan
• 5 Year Warranty

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GSI Super Quality Photo Package for Cellular Mobile Phone’s Camera – Long Focal 8x Zoom Optical Telephoto Extended 30x70mm Lens + Universal Holder Mount for All Sizes – Turn your Cell Phone into a High-End Camera!

• Amazing New Product Adds a Whole New Dimension to your Cell phone!
• Superb 8x Optical Zooming Will Provide Great Shots from a Distance
• Avoid Image Contortion – Manual Focus Adjustment – Size: 30x70mm
• Universal Adjustable Holder will Mount Any Mobile Phone
• Adapt to All Standard Tripod’s for Further Photography – Tripod Not Included

Outfit your Beloved Mobile Phone with this new Photo Package from GSI, and watch your iPhone develop into this Super Camera! Simply attach the Lens and the Camera on Phone will take Crystal Clear Pictures from your Favorite People or Moments. Affordable and Extremely User Friendly, this is ideal for Everyone!

Rating: (out of 1 reviews)

List Price: $ 29.99

Price: $ 19.99

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Star Testing Astronomical Telescopes: A Manual for Optical Evaluation and Adjustment

Many observers harbor misgivings about their telescope. The manufacturer may have guaranteed accuracy to one-quarter wavelength or as diffraction-limited but most telescope users have, at best, only a hazy idea of how to personally verifying such claims. Sure, there are ways to check the accuracy of individual components but for many they are hard to understand or require costly reference optics and other test equipment. Besides, telescope users are interested in the performance of the entire optical train, not just the main optical element. What is really needed is a test that can be used at the observing site, so that all the problems that impact on a telescope’s performance can be diagnosed. Isn’t there a simpler and more complete way than the complicated shop tests? Yes, the star test is such a method. It uses the entire working telescope. It isnot a poor substitute or a work-around that uses bits and pieces of the optical system. It is the oldest and most sensitive of the optica

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List Price: $ 34.95

Price: $ 34.95

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Seller: Amazon

Vixen's unique catadioptric design features a high precision sixth order aspherical primary mirror, a convex secondary mirror and triplet corrector lens. VISAC is an abbreviation for Vixen's Six-Order Aspherical Cassegrain. The primary mirror is held by a retaining ring, instead of hooks to decrease flare and enhance constrast. The VC200L is an 8" ... [Read More]

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Seller: Amazon

Like the popular Schmidt-Cassegrain, the Japanese made Vixen VMC260L is a true all purpose telescope. Despite its long focal length, the tube is only about 650mm (20”) long. As a result the instrument is very portable.With its large aperture the VMC260L collects enough light for serious visual and photographical applications for both planetary an... [Read More]

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GSI Super Quality Land And Sky 50mm Telescope – 180x Power Magnification – Optical Glass Lens and Metal Body – Includes Table-Top Tripod and 2 Eyepieces

• Great Beginner Telescope – Explore the World – Land and Sky
• High Powered 180x Magnification – See The Stars Come Alive – Amazing Clarity
• Fashionable, Stylish Sturdy Metal Tube – High Quality Optical Glass Lens
• Includes a 2x Image Erector, Focal Length – 360mm, 3x Increasing Lens
• Fun and Educational – Ideal for the Beginner or Pro, Children and Adults

This great new Telescope from GSI will meet and exceed your expectations! Easy, User-Friendly Setup, and Unbelievable Views Through the Ultra Clear Lens, you will discover the world like never before. Extremely Affordable, it is a great alternative to other Pricier models out there!

List Price: $ 69.99

Price: $ 29.99

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14" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical TubeFastar Compatible (select option)Celestron's premium StarBright XLT coatings3910 mm focal length (f/11)40 mm 1.25" eyepiece included (98x)Visual back allows for use with 2" accessories9x50 finderscope to help accurately find objects2" mirror diagonal provides more comfortable viewing... [Read More]

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14" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical TubeFastar Compatible (select option)Celestron's premium StarBright XLT coatings3910 mm focal length (f/11)40 mm 1.25" eyepiece included (98x)Visual back allows for use with 2" accessories9x50 finderscope to help accurately find objects2" mirror diagonal provides more comfortable viewing... [Read More]

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