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    frontman9000's Avatar
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    Default Difference between 1.25" & 2" ep's at higher mag



    As a beginner, could some explain if they are any differences between an 1.25 and 2" ep's at higher magnifications? Are there pros and cons? If one has the ability to look at an object at 150x in either size would you choose 2" or 1.25?

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    Default

    ALL of my high powered eyepieces (25 mm and lower) are 1.25 inches.

    ALL of my low powered eyepieces (26 mm and larger) are 2 inch eyepieces...

    The only advantage of 2" eyepieces is a larger field stop that allows for a larger FOV and when using a high powered eyepiece I do not need a large FOV...

    Bob G
    8.5, 10, 13, 17, 20 mm eyepieces in 1.25 inch
    and 26, 31 35 and 38 mm in 2"
    I run a Denk Power switch diagonal with a built in Barlow and focal reducer wheih allows any eyepiece to give me 3 different magnification ..

    Bob G
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
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    Default

    I'm sort of with you on this frontman, (i have no idea) i've just read another post where someone is interested in getting a high mag short focal length 6.7mm 2". So what does it all mean. Is it better to see at Wide FOV at high magnifs or is it better to see high magnifs with a 50`-54` FOV standard 1.25" possl's?

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    Default

    2" in the most cases they have a wide fov, they are good in low and high magnification for two reasons..they get more light directly from the scope and they give more eye relief in general so for people like me that we use glasses they are better.

    Unfortunally they are expenser than 1.25" so for example I bought a lot of filters and eyepiece for high magnification but my low magnification eyepieces will be 2" also i will include a 2" diagonal and a 2" barlow with 1.25" adapter to use with my current eyepieces and filters...

    Regards
    Antonio
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