80X80 Binoculars ruby lens on ebay are they any good or just a selling trick? They would not be good. There is a relationship between the first number (magnifcation) and the 2nd number (objective lense size). It should be about 1 to 4 maximum. When smaller than that the image is not sufficiently bright nor [...]
49tn Refractor Telescope & Microscope $38.94 50 x 50mm table telescope & 900x microscope Refractor telescope is ideal for land or sky viewing for the young observer 19-piece microscope kit includes assorted examination slides, preparation tools & sample slides Mtel-50 Aim Table-top Refractor Telescope $43.94 Refractor-type telescope 20x – 80x power range Focal length: 350mm [...]
Euphoric Classics: A Classical High $16.98 … Sony Classical: Great Performances, 1903-1998 $19.94 4 CD set in a ‘fat’ double jewelbox. 80 tracks. 2 deluxe booklets. Light scuffs on discs will not affect play. Tiny drill hole next to barcode…. Progress Lighting P5533-10 Chain and Ceiling Mount Lantern with Beveled Glass Chain and Ceiling Mounts [...]
How to Use a Telescope – Reflector Telescopes an Introduction Author: John B. Mayall Telescopes are of two main types – reflectors and refractors. The fundamental difference between both types is the kind of glasses used for light collection. Refractors use lenses while reflectors use mirrors. Going back to school physics, it is obvious that [...]
Let Energy Rebates Help Pay for your Window Film- 2007 Incentives Make This a Smart Energy Choice Author: Mike Feldman Every one of us is aware of the amount of money we spend each week consuming electricity. Where we fall short is taking proactive steps to reduce our costs to keep our homes and businesses [...]
3 x Digital Binocular Camera – 300K CMOS Sensor + 8MB Memory 3pcs 4 Mode Digital Camera for taking still photos, using as a PC camera, recording digital video clips, and using as quality binoculars. See what you want to take pictures or recordings of from a far distance and then record what you are [...]
A telescope that produces an overall angular magnification of 38 uses an eyepiece lens with a focal length of? A telescope that produces an overall angular magnification of 38 uses an eyepiece lens with a focal length of 5 cm. What is the focal length of the objective lens? _____cm Magnification = F(objective)/F(eyepiece), thus F(objective [...]
OpSwiss 20-60×70 Zoom Binoculars $160.88 Feature XLR ruby coated lenses for more light and less glare, thumb lever to change from 20 to 60 power, hinged 8″ barrels, center wheel focus, neck strap, and lens cloth…. Barska X-trail 10×50 Binocular $19.98 Barska 10×50 X-Trail Wide Angle Porro BK-7 Prism Binoculars, Black, Box Pack AB10276… Barska [...]
Can you take antibiotics the day after a huge night? I drank nearly a bottle of jagermeister last night and alot of red bull, it is now around 18 hours since I had my last drink. I was just wondering if I would be able to take antibiotics for a sinus infection I have right [...]
Advice on what kind of telescope to buy? Ok, for Christmas I’d like to purchase a telescope for my hubby. I’ve found a few that look ok, but I’m not sure if it’s good or not. 1.) Galileo 1000mm x 120mm Reflector Telescope 10mm (100x) eyepiece 20mm (40x) eyepiece 3x Barlow lens CIR electronic finder [...]
Como Pocket Design Fuchsia Binoculars Observing Toy 2.5X24 $4.49 Description: Binoculars 2.5 x 25 Telescope is ideal for children to play, also ideal for them traveling. 2.5 times Binoculars Easy take away with Neck Strap ( a nylon strap included )…. Como Binoculars 2.5X24 Observing Telescope Toy for Children $4.50 Description: Binoculars 2.5 x 25 [...]
What is the cost of #14 welder’s glass and solar filters(in India in particular)? Well, ask your compatriots, my suggestion is that you can borrow one (No. 14) from a nearby machine/welding shop or from a neighbor. But be sure to use only no. 14! So enjoy…. Bodum Ceylon 51-Ounce Iced Tea Maker with Removable [...]
Newborn’s Trauma Transforms Into Help for Families Author: Matt Dragovits Orlando, FL (July 5, 2007) – Late one night, after only one month of life, Elizabeth Dragovits had severe obstructive sleep apnea and nearly died in her father’s arms. Her underlying medical condition was unknown to her parents at the time. All they knew as [...]
See the rings of Saturn with the Orion SpaceProbe 130 Author: Steve Griffin Sporting the classic long-tube Newtonian design, the Orion SpaceProbe 130 mm provides great all-around viewing performance. One minute you can be studying lunar crater formations at high power; the next, the ethereal glow of a nebular star factory. A few minutes later, [...]
What Are Telescopes and Its Benefit? Author: Subhash A telescope “telescope” is an instrument designed for the observation of remote objects. The term usually refers to optical telescopes, but there are telescopes for most of the spectrum of electromagnetic radiation and for other signal types. An optical telescope is an optical tool that gathers and [...]