Question about Vivitar (1607225) Telescope

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Lens size/ power

I got this telescope and love it. However, I cannot find any of the more powerful lenses from vivitar. Does anyone know where I can find some with a power greater than 100x that will fit this scope? I have tried ebay and the like with no luck.
Thanks

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It is generally bad to go higher than 50 power per inch aperture, due to the wave nature of light. It will magnify, but the image will get steadily worse, and be 'fuzzy' and unable to sharpen. If the telescope is 60mm, then the maximum practical power is 118x
If you insist on going higher, consider the use of a barlow. That will make the eyepieces that you have go 2x greater magnification.

Posted on Jun 06, 2008

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You have asked a loaded question like "what size is a grey suit".

You need the focal length of the telescope divided by the size of the lens. Say 700 mm divided by 12.5 mm = 56 power. That said how close do you want to get to it? And how steady is your telescope?

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I going to straight forward on this answer. This telescope is a useless piece of junk! The tripod is unstable, the .965 (obsolete size and design) eyepieces will only focus dead center. The finder is useless, too narrow a field to find anything. The high power eyepiece exceeds the maximum useful magnification (only 98x max under perfect conditions) This may be used for terrestrial viewing but worthless for astronomy.

Dec 18, 2011 | Vivitar (1607225) Telescope

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The lenses do not secure into the eyepiece. Also, I can not see anything through the telescope. I've tried during the day and at night. ??


Use the weakest lens the lens cap is off I hope lol I have a Meade scope and it has thumbscrews for the lenses that must be tightened evenly.It's tricky to see through a telescope especially if you have a strong lens in there instead of a weaker one.

Jan 03, 2011 | Vivitar (1607225) Telescope

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I have a vivitar telescope and lost the instructions.


You did not say what model or type of telescope you have-- most of the Vivitars are very simple telescopes --- they all work the same way -- there are two basic types of telescope:

Reflectors -- which use mirrors, and the eyepiece is inserted into the side of the tube

Refractors - these "look" like a telescope-- and use a lens in the front and an eyepiece in the back.

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Jun 27, 2009 | Vivitar (1607225) Telescope

1 Answer

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You don't need to get Vivitar brand eyepieces to get additional ones for your telescope. I'm not sure of the specifications for this particular telescope but in general they come in two barrel sizes for the eyepieces. The diameter of your eyepiece is probably 0.965" but could come in the more standard 1.25". You can measure the diameter and determine this quickly.

Once you know the diameter to shop for you can look for the focal length of the eyepiece you wish to purchase. They are rated such as 4mm, 10mm, 25mm, etc. The smaller numbers give you higher magnification. You can calculate the magnification by dividing the telescopes focal length by the eyepiece focal length. For example, let's say your telescope is has a focal length of 360mm and you have an eyepiece rated 10mm. Divide 360 by 10 and that gives you a magnification power of 36.

You can find eyepieces at many telescope dealers on the internet. Your selection will be far less if you use 0.965" eyepieces. You can purchase 0.965" to 1.25" adapters so that you can use the larger eyepieces with your telescope. However, on some telescopes the adapters will cause the new eyepiece to not come into focus.

You'll also find that eyepiece prices go all over the place. A good general purpose eyepiece is a type called the Plossl. The better eyepieces have more coatings too that allow more light to get through to your eye. You'll find these listed with terms like "fully multi-coated".

I hope this helps.

Good luck and clear skies!

-jodair

Mar 25, 2009 | Vivitar (1607225) Telescope

1 Answer

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You don't need to get Vivitar brand eyepieces to get replacement ones for your telescope. I'm not sure of the specifications for this particular telescope but in general they come in two barrel sizes for the eyepieces. The diameter of your eyepiece is probably 0.965" but could come in the more standard 1.25". You can measure the diameter and determine this quickly.

Once you know the diameter to shop for you can look for the focal length of the eyepiece you wish to purchase. They are rated such as 4mm, 10mm, 25mm, etc. The smaller numbers give you higher magnification. You can calculate the magnification by dividing the telescopes focal length by the eyepiece focal length. For example, let's say your telescope is has a focal length of 360mm and you have an eyepiece rated 10mm. Divide 360 by 10 and that gives you a magnification power of 36.

You can find eyepieces at many telescope dealers on the internet. Your selection will be far less if you use 0.965" eyepieces. You can purchase 0.965" to 1.25" adapters so that you can use the larger eyepieces with your telescope. However, on some telescopes the adapters will cause the new eyepiece to not come into focus.

You'll also find that eyepiece prices go all over the place. A good general purpose eyepiece is a type called the Plossl. The better eyepieces have more coatings too that allow more light to get through to your eye. You'll find these listed with terms like "fully multi-coated".

I hope this helps.

Good luck and clear skies!

-jodair

Feb 11, 2009 | Vivitar (1607225) Telescope

1 Answer

How do I know what size lenses to look for?


Hi rlopez117,

Congratulations on the aquisition of such a great vintage camera!

Pentax cameras use a mount known as M42. This means it is a 42 millimeter diamater. You may also find this referred to as the Pentax mount, as Pentax (Asahi Optical) made this popular in the United States. With any camera, any lens you purchase should match the mount of the camera in order to be used together.

Thank you,
Jason,
Go Ahead. Use Us.

Jun 25, 2008 | Vivitar Telephoto 100mm f/3.5 Macro Manual...

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Manual


I can scan it for you!

Feb 21, 2008 | Vivitar (1607225) Telescope

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