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Thread: Is My Telescope Filter A Bootlegged Fake?

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    Default Is My Telescope Filter A Bootlegged Fake?



    Purchased a Baader 495 Longpass yellow filter. My goal was to use the filter to increase magnification. I have a 120mm f/8 achromatic telescope. Objects tend to break down after 166 magnification. I aimed my scope at Orion. The Trapezium stars looked out of focus at 166 magnification. I even backed off to 111 magnification. The filter did not improve the image. I often use a 3 inch aperture mask to sharpen things up at high magnification. However, with the aperture mask I lose optical resolution. Thus, the investment in the filter. What was really interesting, is my cheapo yellow filter #8 did a better job. My homemade 3 inch aperture mask did an even better job.

    The filter is in the mail, back to the vendor.


    Your thoughts, thanks.

    By the way, does anyone know how to upload an image?

    https://agenaastro.com/baader-yellow...1-2458301.html
    Last edited by refractordude; 03-11-2019 at 04:39 PM.

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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    Hello Refractordude,

    your findings are correct, I have also the both yellow filters, and an aperture mask.
    An aperture mask plus a light 470nm filter works also fine for me (on Jupiter), as the diffraction limited resolution increases with decreasing wavelengths.

    Next time, ask first, and decide to purchase or not to purchase, later,

    JG
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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    I'd check to see if Baader is spelled correctly. If it says Badder or Baadre on the housing the odds are it's a bootleg lol.



    Mine seem OK.



    Mind you, colour is not spelled correctly ...

    Or spelt correctly for that matter ...
    yobbo89 likes this.
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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    Hello, j.gardaysky

    I read plenty reviews that this filter will do what I purchased it for.

    https://www.google.com/search?q=495+...hrome&ie=UTF-8

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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    Quote Originally Posted by j.gardavsky View Post
    Hello Refractordude,

    your findings are correct, I have also the both yellow filters, and an aperture mask.
    An aperture mask plus a light 470nm filter works also fine for me (on Jupiter), as the diffraction limited resolution increases with decreasing wavelengths.

    Next time, ask first, and decide to purchase or not to purchase, later,

    JG
    Hi JG. I think I am missing something. Yellow filter would block shorter (blue) waves and pass longer yellow-red. How does this improves resolution?
    CamelHat likes this.

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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    The use of filters is very subjective, what works for one person's eye may not necessarily work for another's. The filter topic seems to mostly be one of endless debate. Personally, I use filters infrequently, but when I do they most often render good service.

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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    Ozman 13 hit the nail right on the head. Be that as it may, I will check with my friends at this forum first. One of these days https://www.stellarvue.com/stellarvu...let-refractor/
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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    Quote Originally Posted by Shorty Barlow View Post
    Mind you, colour is not spelled correctly ...

    Or spelt correctly for that matter ...
    That depends on whether you come from the US or the UK. We Aussies tend to take them both...
    Shorty Barlow and Macrob1 like this.

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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    Quote Originally Posted by refractordude View Post
    Ozman 13 hit the nail right on the head. Be that as it may, I will check with my friends at this forum first. One of these days https://www.stellarvue.com/stellarvu...let-refractor/
    I am also dreaming about $5,000+ 6" APO. It does not mean you have to suffer from CA in the mean time. There are plenty of 80-127mm APO/ED scopes which work great for visual. I started with 100mm ES APO triplet bought on sale, eventually traded up for a used 127mm ES APO, and also picked used Celestron 80mm ED for travel.

    All three provide sharp, CA free views with rich colors, for a fraction of Stellarvue cost. Moon and planets details and sharpens are unbelievable.

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    j.gardavsky (03-12-2019)

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    Default Re: Is My Telescope Filter A Bootlegged Fake?

    Quote Originally Posted by DeanD View Post
    That depends on whether you come from the US or the UK. We Aussies tend to take them both...
    I suppose it depends whether the bootleggers were from the UK or US lol.
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