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Thread: EP for pleiades

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    Default EP for pleiades



    When using my SCT (fl 2800mm, f/10), I can only see small portions of Pleiades. I am using a 40mm plossl and 20 SWA. I was wondering if you can see the whole thing with a 2" EP or is the scopes field of view to narrow. I can see it all in my fast 4.5 starblast. Just curious. Thanks. Derek.
    name: Derek

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    Default

    Derek........good question. I have seen it in my 8" CPC but can't remember. I will have to try and see.
    Name: Mike. Just hanging out here in God's country just watching the stars!
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    Default

    I can see the whole thing with my binoculars, but I have no idea what the FOV is on them. Using Stellarium, it seems that you'd need an eyepiece with a TFOV of at least 1.5 degrees to see the entire cluster, so low magnifications and wide apparant fields of view are in order. I'm planning on trying this with my 26mm EP in the telescope the next time we have some decent weather around here.
    10" f/5 L.E.O. (Lightbridge with Enhanced Optics)
    Celestron Skymaster 9x63 Binocular

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    I have ordered a 35mm eyepiece from Harry Siebert for my F5 dob. (650/130) I was told that it is too wide for my scope, so I e-mailed HS to ask his advice on maybe substituting his 30mm instead. Having had no reply, I am not sure what he has sent. If he has sent the 35, I will see first hand what the effect is.
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    Quote Originally Posted by WWPierre View Post
    I have ordered a 35mm eyepiece from Harry Siebert for my F5 dob. (650/130) I was told that it is too wide for my scope, so I e-mailed HS to ask his advice on maybe substituting his 30mm instead. Having had no reply, I am not sure what he has sent. If he has sent the 35, I will see first hand what the effect is.
    Sounds cool. Let us know how it goes. Thanks.
    name: Derek

    Various scopes and such.

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    Hi Derek ...I had the same problem with my 8in SCT f10 scope ...I had initially gotten the plossl eyepieces with it and they only have a 60 degree field of view but the qx wide angle 70 degree field with a focal reducer of 6.3 the pleadies shine ....Full field of stars ...Of course i have a 2000mm scope before the reducer .....
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    Quote Originally Posted by dmbryan View Post
    Sounds cool. Let us know how it goes. Thanks.
    I think I might see the outside edge of my secondary mirror around the FOV.

    It's gonna be a while, the last shipment took over two weeks by snail mail.

    Anybody?
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    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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    Hey Rich, are you talking about the focal reducers that are used for astrophotography? Does it increase you FOV? Thanks.
    name: Derek

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    The pleiades are awesome though a pair of binoculars. So are the hyades for that matter.
    Observing the universe with a Zhumell Z10 Deluxe
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    Quote Originally Posted by dmbryan View Post
    Hey Rich, are you talking about the focal reducers that are used for astrophotography? Does it increase you FOV? Thanks.
    It turns a f10 scope into a f6.3 which reduces it's focal length ...I think mine would be a 1200mm after the reducer ..Or something like that ...It does reduce the power of your scope but increases the field of view ... the one i have was around 100 dollars ...There are cheaper ones as well as more expensive ones out there but i chose the middle of the road ...I have an antares ..It is a step above the gso but a step below the celestron or meade ... I did a lot of reading about them and dident think it would make that much of a difference .....They do make the view dimmer as you are adding still more glass to the light train but it isent enough in my eyes to make a difference ...
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