That means the binoculars have a zoom mechanism that takes the power from 7X to 21X as far as the eye can see. The type of threads, plate or barrel size on one side of the adapter, spacer, or other item. Used telescopes and telescope accessories can be a great option when working with a tight budget. Open Box or Demo items include the full manufacturer's warranty, while products rated Excellent, Good and Fair come with a full 90 Day Warranty offered by High Point Scientific. The aperture of a pair of binoculars (or any optical instrument) refers to the diameter of the main optics. favorite this post Nov 24 NIKON 35-70mm 2.8 ... Old Cameras for Sale: Variety of Brands, Point and Shoot $15-$20/each $0 ... Nikon ME-1 Hot Shoe Camera Microphone - LIKE NEW $70 (Lawrenceville) pic hide this posting restore restore this posting. The magnification factor, also known as "power", is listed as the first number given in a binocular's name, like 7 x 50, 8 x 40, etc. In general, the larger the body size the heavier the binoculars will be and the more likely you may need to mount them on a tripod when viewing for any length of time. However, not all Barlows increase magnification by the same factor (X). Filter Size: Select Canon EOS DSLR Sensors, Case/Cover Dimensions (LxWxH): 56" x 12.5" x 13" - External, Case/Cover Material: Polyester/Nylon Blend, Known to Fit: Orion Sky View Pro Telescopes and Atlas or Sirius Mounts, Pixel Array & Resolution: 2592 x 1944 (5 MP). That is usually best, however, because there is a huge selection of imaging filters to choose from, including the basic LRGB (Luminance, Red, Green & Blue) filter set as well as narrowband filters that allow you to explore particular wavelengths of light alone or as a group. When talking about zoom binoculars, the magnification is listed like this: 7-21 x 50. Norman 2000ws power pack with two strobe heads, SmallRig Side Plate for Blackmagic Design URSA Mini/Mini Pro, Old Cameras for Sale: Variety of Brands, Point and Shoot $15-$20/each, Mini jib arm.case, and tripod for production value shots, Transecnd 32g gig photo video compact flash card, USED Induro 8X CT-314 Carbon Fiber Tripod, Bundling Lots of Photography Items for $120. The manufacturers listed at any given time during your search refinement offer at least one product that matches other search criteria you have already chosen. Most people can comfortably hand-hold up to an 8X (most popular for birding), but after that, you may or may not need a tripod for a shake-free view...it depends on your own steadiness and how long you plan to view. For instance, 8x50 binoculars have an aperture of 50 mm (and a magnification factor of 8), but unlike a telescope, they have two 50 mm objectives. Accessory Kits can include several different types of telescope accessories. Before you buy, check your telescope focuser's size. 5 photos, 1 large format print and 1 painting. Each Certified Pre-Owned Telescope or Telescope Accessory offered by High Point Scientific passes a rigorous, multi-point inspection that covers optical elements, electronics and exterior moving and weight bearing parts. Used Telescopes & Astronomy Equipment. However, a monochrome camera will grow with you as you add accessories to expand its capabilities. Covered by a 90 Day High Point Warranty. Excellent- Refers to a used telescope or accessory with slight wear that is only visible under close scrutiny. There is a large selection to choose from either way, although a good number of relatively inexpensive beginner imaging cameras often come in color only. $100 (ATLANTA - near airport) pic hide this posting restore restore this posting. The side listed (A or B) doesn't mean anything except to designate one side from the other. OPT has over 70 years of experience in buying and selling used equipment, OPT's customers trust in our inspection process.