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  1. #1
    Maflu's Avatar
    Maflu Guest

    Default Which APO 100mm Refractor to Buy?



    Hello,
    I am looking for a 100 mm / 120 mm APO refractor for astrophotography
    (DSLR) and naked eye viewing. Ideally I think I would buy a Takahashi
    but the price tag is too high for my budget. What model would you
    recommend? Thank you.
    Cheers
    Ted

  2. #2
    Szaki's Avatar
    Szaki Guest

    Default Which APO 100mm Refractor to Buy?

    Are you looking for used or new OTA?
    Used, Vixen or Meade ED APO-s are lower priced, around $1000-to - $1500 on
    the used market, depends what aparture you looking for. I have an older C102
    Floride APO, very nice refractor, got it cheap too.

    Julius

    "Maflu" <teddymaflu_nospam@fastmail.fm> wrote in message
    news:3ff6807c$0$29062$636a55ce@news.free.fr...



  3. #3
    Anders Hansson's Avatar
    Anders Hansson Guest

    Default Which APO 100mm Refractor to Buy?

    Hi Ted,

    I hope you don't mind if I take your aperture requirements with a small
    grain of salt and focus on price versus optical performance for your
    photographic needs.

    You state that your budget is limited. That leads me to believe that you
    are somewhat reluctant to make investments in a high performance
    equatorial mount at this point in time.

    I'm doing a lot of guesswork here (maybe too much!), but if I understand
    your needs and expectations correctly, there are some very sound reasons
    for you to look again at slightly smaller apochromatic refractors with
    speeds between f/5 to f/7.

    Here are two suggestions below 2000 USD:

    Takahashi Sky 90
    Vixen ED 102SS

    Depending on your average weather situation and your lifestyle, you
    might also have some interest in an airline portable astrophoto setup.
    If this is the case, do consider the Stellarvue 80S or the TMB 80/480
    with the TeleVue TRF-2008 reducer/flattener.

    Best regards,
    Anders H.

    Maflu <teddymaflu_nospam@fastmail.fm> wrote in news:3ff6807c$0$29062
    $636a55ce@news.free.fr:




    --
    correct address anhn at telia dot com

  4. #4
    maflu's Avatar
    maflu Guest

    Default Which APO 100mm Refractor to Buy?

    Thanks for the interest of the contributors. Actually I am looking both
    at the new and used markets.

    Also, I should have said that I need a mount as well, and a good one
    with a GOTO function, because as I understand it the mount is very
    important in astrophotography.

    Basically my max budget is something around $3500.

    ALso I need a 2" focuser.

    Cheers

    Anders Hansson wrote:

  5. #5
    clyde crewey's Avatar
    clyde crewey Guest

    Default Which APO 100mm Refractor to Buy?

    Maflu <teddymaflu_nospam@fastmail.fm> wrote in message news:<3ff6807c$0$29062$636a55ce@news.free.fr>...

    You should consider looking for a TV Genesis, since price is
    important. They can be had on Astromart in the $1200 range or so.
    There were two versions, the original Genesis, then the Genesis SDF
    which used fluorite in the front element. You might see Ed Ting's
    review of the Genesis SDF on his site www.scopereviews. He had the
    Genesis SDF side by side with a Tak 102 and a larger AP scope and the
    Genesis fared very well.

    Clyde

  6. #6
    Anders Hansson's Avatar
    Anders Hansson Guest

    Default Which APO 100mm Refractor to Buy?

    Ted,

    You primarily need a reliable mount with little backlash, good vibration
    damping and low periodic error in the RA drive. It is not correct to say
    that GOTO capability is a must for astrophoto or that GOTO by definition
    makes a mount suitable for astrophoto.

    Even if GOTO is lacking, I'm sure that a system like the Vixen ED 102SS
    with a regular dual axis drive on a GP mount with wooden tripod could
    satisfy many of your visual and long term photographic needs.


    Best regards,
    Anders H.



    maflu <teddymaflu_nospam@fastmail.fm> wrote in
    news:3ff6bb96$0$19274$626a54ce@news.free.fr:


    --
    correct address anhn at telia dot com

  7. #7
    smsastro's Avatar
    smsastro Guest

    Default Which APO 100mm Refractor to Buy?

    Maflu <teddymaflu_nospam@fastmail.fm> wrote in message news:<3ff6807c$0$29062$636a55ce@news.free.fr>...

    Hi Ted,

    I would recommend a Vixen 102EDSS f6.5. I own one and I really like
    it. The views are not as color free as an f9 ED or Fluorite but they
    are much better than any achro that I have used. That would be normal
    Synta and the like, I have not used any premium achros like Zeiss or
    DG. The EDSS is a wonderful visual performer and the short FL would
    make it a good choice for photos. It is also very lightweight and is
    easily handled on Vixen GP mount or any other mount in that class and
    at less than $1300 used they're not as expensive as some other scopes
    in its class.

    Clear Skies,

    Steve

  8. #8
    Shawn Grant's Avatar
    Shawn Grant Guest

    Default Which APO 100mm Refractor to Buy?

    none they are all over priced. You would do better with a newtonian. Oh
    astrophotography isn't art.



  9. #9
    Larry Citro's Avatar
    Larry Citro Guest

    Default Which APO 100mm Refractor to Buy?

    Maflu <teddymaflu_nospam@fastmail.fm> wrote in message news:<3ff6807c$0$29062$636a55ce@news.free.fr>...


    Hi,

    I have a Genesis sdf I bought used for 1500 and it's great. One of the
    real bargains if you can find one. It has a built in filed flattner
    and can be sued for 35mm photography.


    Larry Citro

  10. #10
    RichardN22's Avatar
    RichardN22 Guest

    Default Which APO 100mm Refractor to Buy?

    A TeleVue Genesis, or a TV 101 would fit your quality and price requirements.
    I see them on Astromart from $1600 to $2000 used. No color, flat field,
    excellent for both visual and astrophotos. Quality build and a two inch
    focuser. Here are some images I took with my TV 101.

    http://members.aol.com/richardsskyshots/tv101.htm

    I've got other pics, let me know if you want to see them.


    Richard Navarrete
    RichardN22@aol.com
    Astrophotography Web Page - http://members.aol.com/richardn22

 

 
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