My Telescope Store

TASCO 49114500 SPACESTATION 114MM REFLECTOR ST TELESCOPE


TASCO 49114500 SPACESTATION 114MM REFLECTOR ST TELESCOPE
114X MAGNIFICATION; FOCAL RATIO: F/4.4 ; OBJECTIVE LENS DIA: 500MM ; EYEPIECE: 25MM (20X), 10MM (50X), 4MM (125X) ; SINGLE FORK ARM ALTAZIMUTH MOUNT ;

TASCO 49070800 SPACESTATION 70AZ REFRACTOR TELESCOPE


TASCO 49070800 SPACESTATION 70AZ REFRACTOR TELESCOPE
70MM LENS; OBJECTIVE LENS DIA: 800MM ; EYEPIECE: 25MM (32X), 10MM (80X), 4MM (200X) ; PARTIALLY PRE-ASSEMBLED; STURDY DESIGN;

Bushnell Powerview 8x21 Compact Folding Roof Prism Binocular (Black)


Bushnell PowerView binoculars offer the best of both worlds, combining contemporary styling and design with traditional Bushnell quality and durability. This particular PowerView binocular offers an 8x magnification and a 21mm objective diameter. The fully coated optics, meanwhile, guarantee superior light transmission and brightness, helping you see just about any target, whether you're searching for birds or trying to get a better view of the stage. And users will love the easy-to-use center focusing system, which adjusts quickly to keep your subject in sharp view. Additional features include a nonslip rubber armor housing that absorbs shock while providing a firm grip, a neck strap and a carrying case for easy transport, and 9mm of eye relief.

Specifications:

• Magnification: 8x
• Objective lens diameter: 21mm
• Size class: Compact
• Focus system: Center
• Prism system: Roof
• Prism glass: BK-7
• Lens coating: Fully
• Field of view @ 1,000 yards: 378 feet
• Close focus distance: 21 feet
• Exit pupil: 2.6mm
• Eye relief: 9mm
• Eyecups: Fold down
• Waterproof/fogproof: No
• Adapts to tripod: No
• Weight: 7 ounces
• Warranty: Limited lifetime

Tech Talk
Objective Lens: The diameter of the objective or front lens. The larger the objective lens, the more light that enters the binocular, and the brighter the image.

Field of View (F.O.V.): The side-to-side measurement of the circular viewing field or subject area. It is defined by the width in feet or meters of the area visible at 1000 yards or meters. A wide angle binocular features a wide field of view and is better for following action. Generally, the higher the magnification, the narrower the field of view.

Roof Prism System: In roof prism binoculars the prisms overlap closely, allowing the objective lenses to line up directly with the eyepiece. The result is a slim, stream-lined shape in which the lenses and prisms are in a straight line.

Tasco Essentials 8x21 Binocular (Black)


Ultra-light binoculars offer outstanding compact performance with rugged, rubber armor ideal for hiking, backpacking or bicycling. Features fully coated optics for brightness, 8X magnification with 21mm objective lens, rubber fold-down eyecups for eye relief. Designed to fold down into itself to become even more compact. Includes carrying case. Limited lifetime warranty.

Bushnell Falcon 10x50 Wide Angle Binoculars (Black)

Handy fold-down eyecups prevent prescription glasses and sunglasses from scratching.

Bushnell is the leading brand in high-performance binoculars, and the Falcon series offers powerful magnification at an economical price. Versatile, and ideal for stadium sports, bird-watching, hunting, and many other outdoor applications, the 10x50 model boasts a durable design and rubberized, abrasion-resistant finish. An InstaFocus lever provides smooth feedback, with just enough tension to fine-tune magnification, while a Porro prism and coated lenses provide sharp viewing. For those who wear eyeglasses, or sunglasses on bright days, clever fold-down eyecups protect your lenses from scratching.

Specifications

• 10X magnification
• 50-millimeter lens diameter
• Auto focusing Porro prism
• 25-foot close focusing distance
• 27-ounce weight
• Nine-millimeter eye relief
• Five-millimeter exit pupil
• 300-foot field of view at 1,000 yards

About Bushnell
Bushnell has been the industry leader in high-performance sports optics for over 50 years. Its guiding principle is to provide high quality, reliable, and affordable sports optics products for a wide variety of applications. Bushnell products have consistently won design and performance awards from prestigious organizations, and the company's product lines enhance the enjoyment of outdoor pursuits such as spectator sports, nature study, hunting, fishing, birding, and stargazing. The company often incorporates emerging technologies that combine leading edge design with performance innovation, which has made it one of the most recognized and reputable sports optics brands in the world.

Essential Optics Review for the Boards


About the Book

This is the new Second Edition with chapters on low vision and vision rehabilitation to help readers prepare for the oral boards. There is a chapter on contact lenses by Ali Bukhamseen, OD, FAAO, FIACLE, Chief of Optometry Department, Saad Specialist Hospital, Al-Khobar, Saudi Arabia.

Dr. Wilkinson is co-author of Protect Your Sight and author of Essential Optics Review for the Boards. Dr. Wilkinson is a clinical professor of ophthalmology in the Carver College of Medicine at the University of Iowa. The Department of Ophthalmology and Visual Sciences there is consistently ranked as one of the best ophthalmology teaching programs in the United States. Dr. Wilkinson serves on the Executive Committee of the American Optometric Association Low Vision Rehabilitation Section and the Planning Committee of the National Eye Institute’s National Eye Health Education Program. He has published extensively and spoken all over the globe concerning issues related to visual rehabilitation. He teaches optics to the ophthalmology residents at the University of Iowa and around the world.

About the Author

Dr. Wilkinson’s optics course at the University of Iowa helps residents survive the Ophthalmic Knowledge Assessment Program (OKAP) exam and boards. Now, in book form, his material will help residents and students ace optics. His book is concise and complete with over 150 questions to guide the student through optics. The book utilizes diagrams to teach and provides a high-yield review of optics that’s needed for success on the boards.

Don’t take the boards without this book!