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to view peleades?

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#51 Dennis_S253

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Posted 05 January 2013 - 11:56 PM

I like mine better

#52 Dennis_S253

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Posted 06 January 2013 - 12:02 AM

Maybe I shouldn't have inverted the colors. Lets try again..
2 degree...

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#53 Dennis_S253

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Posted 06 January 2013 - 12:03 AM

Stuffed...

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#54 Dennis_S253

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Posted 06 January 2013 - 12:11 AM

I had to fudge the numbers on the 40mm to get the 2 degree FOV but theres your framed view. I still like mine better. So is this a personal preference? I just wanted to know what they were looking at. Show me some pics... Maybe there looking at the Hyades???

#55 Jon Isaacs

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Posted 06 January 2013 - 07:36 AM

Dennis:

I am looking at your scope list and I believe the widest field of view is possible is with your 6 inch with the 1000mm focal length which has a 1.25 inch focuser. My calculation based on the field stop indicates the maximum possible field of view is no more than 1.6 degrees, enough to take in most of the cluster.

At some level it is a matter of personal choice but it is worth remembering that a scope capable of framing the Pleiades in a 2.5 degree TFoV is also capable of a 1.6 degree view or whatever else might be of interest. So, if one is looking for a scope well suited for viewing the Pleiades, one that can show all the different aspects is nice to have.

Jon Isaacs

#56 Tony Flanders

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Posted 06 January 2013 - 09:33 AM

That's missing my very favorite feature, chopping off the chain reaching down to HIP 17776.

#57 Perigny270

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Posted 06 January 2013 - 11:33 AM

I look for them every time I go out. Any time, for any reason. If I want a real lift, I reach for the binos. Top of the list for first time viewers. But my favourite is 31mm Baader aspheric in my 102 APO. It was the first thing I looked at with that EP - I couldn't tear myself away from it. These days it's a double treat as it's a short jaunt to Jupiter and Aldebaran...

#58 Dennis_S253

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Posted 06 January 2013 - 11:33 AM

Yes Jon, I know the limitations of my scope very well. That's why I said I had to "fudge" the numbers to get the 2 degree FOV. If you want to "frame" the Pleiades in a 2 degree FOV then that's a personal preference. But it is not required to see the seven sisters and 2 parents. I was wondering if someone was confusing Pleiades and Hyades. That was why I questioned it.
LOL Tony, that's one of my favorites also. That's why I use my 32mmm.

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#59 newtoskies

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Posted 06 January 2013 - 11:41 AM

Yep, my favorite as well and view it every time when the scope is out, or the binos. I use my 32mm and get good views.

#60 Jon Isaacs

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Posted 06 January 2013 - 02:05 PM

Yes Jon, I know the limitations of my scope very well. That's why I said I had to "fudge" the numbers to get the 2 degree FOV. If you want to "frame" the Pleiades in a 2 degree FOV then that's a personal preference. But it is not required to see the seven sisters and 2 parents. I was wondering if someone was confusing Pleiades and Hyades. That was why I questioned it. LOL Tony, that's one of my favorites also. That's why I use my 32mmm.



Dennis:

M-45 consists of more than just the 7 sisters and two other bright stars. Most sources seem to identify M45 as being 2 degrees. It's worth nothing that M45 is different than many clusters because one sees about all there is to see with a relatively small scope. In contrast, M-7 is quite different in this regard. It is very nice in a smaller scope but if one points a 16 inch scope at M7, one suddenly sees a great deal more.

So, to play the devil's advocate, your 32mm eyepiece provides something close to a 1.6 degree field of view, if you scope were capable of a 2.0 or 2.5 degree field of view, would the 1.6 degree TFoV still be your preference?

Jon

#61 Dennis_S253

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Posted 06 January 2013 - 09:04 PM

Hey Jon, I've really been thinking hard about your question. For some reason, I really like the stuffed look. So I guess it is a personal preference. Maybe that's why I don't use my Bino's very often. I do like my 6X30 7* FOV finder scope though.






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