+852 6066 4630

info@apexeloptic.com

Help Center
Track your oders
Search
Apexel
  • Home
  • Shop
    • Outdoor Optics
      • Monoculars
      • Binoculars
      • Rangefinder
      • Night vision
    • Mobile Lens
      • Macro Lens
      • Wide Angle Lens
      • Telephoto Lens
      • Fisheye Lens
      • Anamorphic Lens
      • Mobile Lens Kit
    • Microscope
      • Digital microscope
    • Vlogging Accessories
      • Gimbal Stabilizer
      • Video Lighting
      • Vlogging Kit
  • Capabilities
    • Manufacturing Capabilities
      • Aspheric
      • Spherical
      • Optical Coatings
      • Filter Coatings
      • Prisms
    • Research and development
    • Manufacturing
    • Quality
  • Volume OEM&ODM
  • Solutions
    • Security and Surveillance
    • Automotive
    • Medical imaging
    • Machine vision
    • LOT Lenses
    • AR/VR
  • Become Our Partner
    • About us
    • Contact us
    • Recruit Internet Celebrity in the World
  • Resource
    • Service & Support
    • Blog
    • Video
    • Warranty
    • Optical knowledge

Blog

Tips on buying telescopes

Apexeloptic2022-03-24T09:59:49+00:00
Telescope

If you’re a novice photographer, you might have all sorts of doubts when it comes to buying your favorite pair of binoculars because you don’t know anything about telescopes.  So with that in mind, the author has compiled this guide to give novice photographers a few tips on buying telescopes to help you get the telescope you want.  

1. Common knowledge of telescope specifications  

The size is mainly determined by the multiple and the aperture of the objective lens.  The multiple of a telescope is how much it brings something far away closer together.  In addition, the higher the multiple is not the better. If the multiple is too high, the object looks very shaky and not so clear, and it is not convenient for us to carry.  The telescope’s physical environment is also important.  The larger the aperture, the more comfortable we are looking at objects, but it is the same as the multiple, the larger the aperture, the larger the volume of the telescope, so we have to choose the telescope according to their own choices.  

2. Common knowledge of selecting telescope optical components  

The telescope market is mixed, and the development of telescope materials is changing with each new day. Before 2000, inferior telescope manufacturers used substandard optical components to replace them, and after 2001, resin lenses emerged as a rookie, with lower costs and further reduced optical performance.  The prism of the optical element identification method, because of the large volume of telescope prism, is difficult to manufacture with resin, so it is a shoddy method.  

It is also easy to identify, turn the telescope upside down, and look at it from the objective end to the bright and open place. If there is a broken black line or black stain in the inner part, it means that the telescope is assembled with waste. The broken black line and black spots are broken back and broken points of the prism.  In the lens identification section, look carefully at the eyepiece of the telescope. If it is not pale blue but white (actually colorless), the eyepiece is not coated.  

natural scenery

Why is there no coating?  Because it is pressed with plastic resin, put in the coating machine before coating in the preheating stage of the coating material was baked in high-temperature deformation or melting.  The eyepiece system of a telescope, however, consists of several lenses, some of which use the outermost lens with optical elements and the inner one with resin lenses.  

So this kind of colophony lens has a shortcoming, it is like quality is bad, especially chromatic aberration and distortion are extremely serious, might as well take a telescope to look at the distant rod-shaped object, had better be a light color.  For example, telephone poles, if the edge of the image is covered with a rainbow-like coat, and the telescope’s edge field of view is very blurred, it is a fake.  

3. General knowledge of optical effects of telescopes  

Generally, when we buy telescopes, we will see the same specifications of the telescope, the price is very different, which is mainly our telescope lens coating is different, because it affects the quality of the telescope optics.  Military telescopes are usually the brightest, and the brighter they are, the farther they can see.  

The better the coating, the more transparent and darker the lens.  There is also a telescope is red film telescope, the lens of the red film can not only increase the brightness of the telescope but also make the image more like, you can also choose this type of telescope.  

4. Common sense of telescope multiples  

There are no technical difficulties with high-power telescopes. You can go as high as you want, but there are a lot of negative consequences.  The first is brightness. The higher the multiple, the worse the surface brightness of the object will be, because the area of the object is magnified proportional to the quadratic magnification, and the brightness decrease will be very obvious. 

 Of course, if the telescope aperture is large, the multiple can be appropriately high, but the hand-held telescope aperture is generally not more than 50mm.  Even more important is the jitter caused by high power. Handheld telescopes have slight jitter, but this slight jitter becomes very noticeable when magnified.  

What is the use of enlarging the magnification of the telescope when the wobble of the image makes it impossible for the human eye to fully observe the details of the image?  If the telescope can be fixed on the tripod, the magnification can be higher, of course.

natural scenery

However, for the ground-to-ground telescope, due to the limitations of brightness and resolution mentioned above, the magnification can not be too high, otherwise, the image will be very dim and fuzzy, and the field of view is too small, and it is difficult to find the target.  In general, the highest magnification we see in large binoculars for ground observation is 60 times larger and has diameters of more than 100mm.  

5. Buying common sense on telescope functions  

The nitrogen inside the telescope has the effect of water and also prevents the internal lens from fogging and mildew, which is mainly because the telescope is well sealed, so this increases the durability of the telescope.  There are generally Porro prism and roof prism.  Porro prism, although large, has a simple structure, high light transmittance, and good imaging quality.  Roof prism, though smaller in size, has a complex structure and low light transmittance.  

Share this post

Facebook Twitter LinkedIn Google + Email

Related Posts

How do choose a telescope suitable for children?

Choosing a telescope for yourself or someone else can be a tricky task, especially for... read more

Old driver hand in hand to teach you how to pick a telescope

The telescope is a kind of travel necessary items, but also people watch concerts and... read more

5 tips for using telescopes in 2022

Binoculars are incredible tools for outdoor photographers and outdoor explorers.  While simply holding them up to... read more

Things you do not know about telescopes

The telescope is a kind of travel necessary items, but also for people to watch... read more

Is a monocular better than a telescope?

Nature is even more fascinating when we can witness it. Thanks to inventions such as... read more

What you need to know to Buy the Best Telescope (part 2)

A good pair of binoculars is a long-term investment, which is why it's best to... read more

Does the telescope need maintenance?

With the progress of The Times, people's life has become better, from the pursuit of... read more

Can a telescope be used as a binocular?

Most of us have heard of telescopes, especially professional photographers who love outdoor photography, but... read more

Three tips for using a telescope

Telescopes are often used when traveling because they can be seen clearly in the distance.  But... read more

Learn about telescope commissioning procedures

You may have bought your favorite telescope, but amid your euphoria, you may find that... read more

  • Optical solutions
  • Binoculars
  • Hunting/Shooting Advice & Tips
  • Macro Lens
  • Telephoto Lens
  • Wide Angle Lens
  • Stick Tripod
  • Pre Sales

About The Blog

Recent Posts

Apexel Smartphone Adapter(APL-F002)
Apexel Optic Camber Technology
Optical coating technology
Apexel Optic Camber Technology
Optical coating

Apexel

OPTICAL SOLUTIONS

  • Security lenses
  • Automotive lenses
  • Medical imaging
  • Machine vision
  • loT lenses
Instagram Facebook-f Linkedin Youtube

CUSTOMER SERVICES

  • Return policy
  • Mode of transport
  • About us
  • Contact us
  • Privacy Policy
  • Track your orders
  • Terms of service

SUBSCRIBE NEWSLETTER

Get all the latest information on events, sales and offers. Sign up for newsletter:

Check your inbox or spam folder now to confirm your subscription.

©  2022 Shenzhen Apexel.  All Rights Reserved
  • Home
  • Shop
    • Outdoor Optics
      • Monoculars
      • Binoculars
      • Rangefinder
      • Night vision
    • Mobile Lens
      • Macro Lens
      • Wide Angle Lens
      • Telephoto Lens
      • Fisheye Lens
      • Anamorphic Lens
      • Mobile Lens Kit
    • Microscope
      • Digital microscope
    • Vlogging Accessories
      • Gimbal Stabilizer
      • Video Lighting
      • Vlogging Kit
  • Capabilities
    • Manufacturing Capabilities
      • Aspheric
      • Spherical
      • Optical Coatings
      • Filter Coatings
      • Prisms
    • Research and development
    • Manufacturing
    • Quality
  • Volume OEM&ODM
  • Solutions
    • Security and Surveillance
    • Automotive
    • Medical imaging
    • Machine vision
    • LOT Lenses
    • AR/VR
  • Become Our Partner
    • About us
    • Contact us
    • Recruit Internet Celebrity in the World
  • Resource
    • Service & Support
    • Blog
    • Video
    • Warranty
    • Optical knowledge
  • Log In
  • Register