Telescope Lens Nikon
Saturday, February 27th, 2010Telescope Lens Nikon
how to make good photo with cheap lens.?
hi today i got my rokinon 500mm for my nikon d60,i know that it cannot produce good photo,but there some guy they can even make very good photos with even field scope and telescope,can someone pls suggest me how to proceed with this lens, i cannot afford expensive lenses.thank you
Most lenses will be sharpest stopped down about 2 stops. Put the camera and lens on a tripod and do some shots at different apertures, at the distance you'll most likely be using it. Look at them carefully to see which is the sharpest and shoot at that aperture as much as you can. This might mean that you're shooting at f/11 most of the time so you'll need to increase the sensitivity to 800 or even 1600 ISO to make sure your shutter speed is fast enough. Always use a tripod.
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Opteka Professional 1X-2.5X Right Angle Viewfinder for Canon, Nikon, Olympus, Sony, & Pentax Digital SLR Cameras List Price: $199.00 Sale Price: $49.95  |
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Ever find it hard to get your SLR in just the right angle to take that perfect shot you've always wanted. Optekas Professional Right Angle Viewfinder let's you line up an off the deck shot without needing to crawl on your belly. The Opteka finder features include a built in diopter with 1X and 2.5X capability, full 360 degree rotation, and universal mounting attachments for most Digital SLR cameras including Canon EOS, Nikon, Olympus EVOLT, Pentax, Sony Alpha, & many more. Padded leather-like pouch for easy handling included. |
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Fotodiox T-Mount Lens Adapter for for Nikon D1, D2, D2x, D2h, D3, D3x, D3h, D100, D200, D300, D300s, D700, D40, D40x, D50, D60, D70, D70s, D80, D90, D5000, D3000 Digital Camears List Price: $25.90 Sale Price: $9.95 |
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If you have a SLR or DSLR camera and other maker/mount lenses, the Fotodiox Mount Adapters allow you to use your lenses on the film/digital camera body. Sharing lenses has some distinct advantages. Certain prime lens just cant be replaced, and you save cost of purchase lenses. Fotodiox offers a range of adapter from large format to smaller format digital adapters. Adapting larger format lens, i.e., large format medium format, medium format 35mm, excellent edge-to-edge sharpness; and the smaller 24x36 mm image field helps minimize the effects of lens distortion and aberration. |
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Nikon 8X20D TelescoMicro Telephoto Lens, for Nikon Coolpix 900, 910, 950, and 990 Digital Cameras, #20014 (Japan) List Price: $179.00 Sale Price: $39.95 |
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Nikon 8X20D TelescoMicro Telephoto Lens, for Nikon Coolpix 900, 910, 950, and 990 Digital Cameras, #20014 (Japan). This unique product was only offered for sale in Japan, and it's considered a highly sought after Nikon collectible product. This unique product converts your specified Nikon Coolpix camera into a camera-telescope. It carries a 1-Year Warranty via Ace Photo Digital. Limited quantities available while supplies last. |
How to Choose Binoculars For Astronomy
When buying binoculars for astronomy one of the main considerations is the light gathering capability of the binoculars you are looking to buy and therefore the size of the objective lens is extremely important.
Before you start check out the range of binoculars for astronomy that are currently on the market you need to consider the distance you are looking to cover and what level of detail you are hoping to see. If you can imagine that a telescope can provide you with a significantly larger aperature (objective lens) and a wide range of magnification abilities it's understandable that for viewing over longer distances, and to see the finer details, a telescope is often a better option. However that said binoculars can prove useful, even for the serious astronomer, and are an inexpensive way to get started.
The real pro's of using binoculars for astronomy is the minimal set up time, the relatively low cost, portability and the fact that there isn't an endless list of accessories that you need to buy.
Manufacturers generally indicate whether or not their binos are suitable binoculars for astronomy but as a general guide you want to be looking for giant binoculars or binoculars with an objective lens that is 50mm or greater. 10x50's are often a popular choice for astronomy as they are reasonably comfortable to hold yet powerful enough for the basic astronomers needs.
Some manufacturers do make smaller binoculars for astronomy such as the Pentax PCF 8x40 or the higher quality Pentax DCF SP 8x43 and Olympus rate their EXPS I 8x42's as excellent astronomy binoculars. As a general rule, and particularly relating to the smaller binos, if the objective lens is 5 times or more than the magnification you can use them for astronomy.
If you are looking for a real meaty beast then the Celestron Skymaster series ranges from 15 x 70 up to 25 x 100 (which offers the power of a small telescope) and Nikon do the 10 x 70IF SP which is considerably more expensive (around £1200 versus up to £400 for a Skymaster) but you are paying for the quality of the lenses and the superior optical design (one of the leaders in it's class). The bigger you go when you are looking for binoculars for astronomy the greater the power and light gathering abilities so if you opt for a 25 x 100 (25x magnification, 100mm objective lens) you will be able to see further and view objects in greater detail than with a 7 x 35 or a 10 x 50 (for example).
Binoculars for Astronomy, quick check list:
• Fully multi-coated lenses are a must
• Waterproof binoculars are generally best if you want to prevent fogging and view in all weather conditions.
• The best astronomy binoculars come with Bak-4 Porro prisms (Bak-4 glass is high quality glass and porro prisms generally provide greater light transmission and a sharper image than their roof prism counterparts)
• Always check a binoculars suitability for astronomy
• Remember the more powerful the better and if you want a performance similar to a small telescope buy a binocular with the largest possible objective lens.
• For larger binoculars make sure you check tripod / mounting requirements.
• Quality optics is important and no more so than for astronomy. If you can afford high quality binoculars they are well worth paying for.
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