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E_Look
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Reged: 03/06/08

Loc: near New York
Re: Your best magnification on planets new [Re: Faraway]
      #5082306 - 02/20/12 04:29 PM

Oh, that was me. I only have one Barlow. But I've got those great short f/l TMB Planetaries. When you Barlow one of those on a night of decent to good seeing... it's sublime! Last night was only sublemon; I couldn't get past 400x and had to observe through a cloud layer.

Quote:

500-700x...you've been stacking Barlows on end, eh? That's very impressive.

I haven't had much success at 266x; Jupiter's cloud bands start to run in on each other & mars remains featureless. I've read that 200-240 is the most practical magnification for a typical night.

I'm interested to know whether anyone has any advice for achieving those views (other than waiting for a clear night...). And thanks, Sam -- a 6mm is in my near future.




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Scanning4Comets
Markus
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Reged: 12/26/04

Re: Your best magnification on planets new [Re: E_Look]
      #5082438 - 02/20/12 05:53 PM

Quote:

If you cannot get a good image at 27x to 35x per inch, as Dave mentions, first place to look is the seeing conditions.




It's not always seeing conditions. It can also be a bad mirror / lens, bad collimation etc....but generally speaking if your scope is up to the task it will be the seeing conditions.

For me:

Mars = 250x-350x
Jupiter = 180x-250x
Saturn = 200x-350x
Venus = 80x-200x (Depending on the Phase)
Uranus = 300x-450x
Neptune = 350x-500x

Cheers,


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HellsKitchen
Pooh-Bah


Reged: 09/05/08

Loc: Melbourne Australia
Re: Your best magnification on planets new [Re: Scanning4Comets]
      #5087541 - 02/23/12 03:54 PM

Saturn this morning was razor sharp at 342x in the 8". Cassini division was easily seen all the way round.

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cpsTN
Carpal Tunnel
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Reged: 04/26/07

Loc: Rutherford Co, TN
Re: Your best magnification on planets new [Re: planet earth]
      #5088940 - 02/24/12 01:39 PM

When I had my 8" f/6 (1200mm FL), I loved the views Jupiter, Saturn and the Moon at the lowish power of 180x. With this scope (8" f/6), I had - and still do - 12mm, 15mm, 20mm, 40mm along with 2x and 3x barlows. The 40mm I used by itself for a low-power view of 30x. These gave me magnifications of 30x, 60x, 80x, 100x, 120x, 160x, 180x, 200x, 240x and 300x. Nice evenly-spaced mags, more or less. I still use these with the 12" f/5, but not with these nice round, easy-to-remember magnificaions. I haven't found my favorate magnfication with the 12" yet. Based on what the 8" gave me, this mag would should be 270x (22.5x per inch).Unfortunately, it doesn't work that way. These EPs are inexpensive ($30 range) Plossls from Agenaastro.com.

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Eddgie
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Reged: 02/01/06

Re: Your best magnification on planets new [Re: Faraway]
      #5091079 - 02/25/12 09:33 PM

I tend to use about 200x to 300x for most planetary observing. Seeing rarely allows more than 250x though.

But at 250x, I can see a pretty huge amount of detail.. More than I can easily describe.

For example about 2 months ago, I resolved Galilee Reggio and Osirus ray system on Ganymede at about 260x.

On Jupiter and Mars, at 260x there is almost always a lot of detial present, including barges, festoons multiple thick bands, ovals, garlands, and intensity variation inside the GRS.

Much of this detail is even visible at 200x.

The key to seeing this kind of detail on planets is not magnification. It is starting with conditions (seeing, thermal equilibrium) and using a telescope with good optics and lots of clear aperture.

There is seldom a need to go beyond 300x for planets in my C14. Most of the best observations I personally have made have been at powers between 200X and 300x. I rarely go higher than this.

Edited by Eddgie (02/25/12 09:57 PM)


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Richard Low
professor emeritus
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Reged: 11/27/05

Re: Your best magnification on planets new [Re: Eddgie]
      #5097079 - 02/29/12 08:27 AM

Last Sat. i had a great view of Mars and Saturn sharp at 788x with 15" dob. And i managed to observe Encke Division.

Details are in the 3rd report on 25 Feb 2012 in here:

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5096974/page/0/view/collapsed/sb/5/o/all/fpart/1

Usually i have sharp views of Saturn and Mars at 563x on my 15" f/4.5 dob. That gives about 37.5x per inch.


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BDS316
Carpal Tunnel


Reged: 09/16/09

Loc: Sol 3
Re: Your best magnification on planets new [Re: starrancher]
      #5097083 - 02/29/12 08:33 AM

"With my Tasco 7T 60mm refractor (1958 vintage) :
Venus at 73x . (bad night)
Mars at 280x . (great night) Who wooda thunk with 60mm ?"

According to what it says on the box, you could have gone even higher!!!


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Asbytec
Guy in a furry hat
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Reged: 08/08/07

Loc: La Union, PI
Re: Your best magnification on planets new [Re: BDS316]
      #5097363 - 02/29/12 11:17 AM

Quote:

According to what it says on the box, you could have gone even higher!!!




My box said 900x with a 3x Barlow and a 4mm Ramsden eyepiece. Supplied.

On Mars, about 450x on good nights and 540x on better nights without too much trouble. It's true, as much can be seen at lower magnification, but boosting image scale helps some, IMO. I'll go as high as conditions permit. On Jupiter, though, pretty much limited to 30x maybe 40x per inch.


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penguinx64
professor emeritus


Reged: 11/12/13

Loc: Holland
Re: Your best magnification on planets new [Re: E_Look]
      #6233317 - 12/04/13 01:01 PM

Quote:

I once got Mars up to 719x and still was able to resolve the polar cap and the greenish regions.

Saturn for me topped out at 575x.

Jupiter has been tougher, only permitting me to get it to 313x or 400x at most.

Neptune and Uranus allowed me to enlarge them up to 719x and still see a defined circumference (limb), and Neptune permitted a blow up to 920x, although it was definitely soft-looking.




So I need a 719x telescope to see Mars or Uranus? No problem. I just need a 4mm eyepiece with 2x and 5x barlows in Celestron Firstscope for 750x.


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Ptarmigan
Lagopus lagopus
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Reged: 09/23/04

Loc: Arctic
Re: Your best magnification on planets new [Re: Faraway]
      #6233567 - 12/04/13 03:16 PM

With an 8 inch f/6 telescope, I use 203x and rarely 407x. This is with a 6 mm eyepiece. Light pollution is not a factor for planets.

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azure1961p
Postmaster
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Reged: 01/17/09

Loc: USA
Re: Your best magnification on planets new [Re: penguinx64]
      #6235085 - 12/05/13 10:30 AM

Quote:

Quote:

I once got Mars up to 719x and still was able to resolve the polar cap and the greenish regions.

Saturn for me topped out at 575x.
Jupiter has been tougher, only permitting me to get it to 313x or 400x at most.

Neptune and Uranus allowed me to enlarge them up to 719x and still see a defined circumference (limb), and Neptune permitted a blow up to 920x, although it was definitely soft-looking.




So I need a 719x telescope to see Mars or Uranus? No problem. I just need a 4mm eyepiece with 2x and 5x barlows in Celestron Firstscope for 750x.




Lol, sounds like a plan to me.

Pete


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aa6ww
professor emeritus
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Reged: 10/23/11

Loc: Sacramento, Calif.
Re: Your best magnification on planets new [Re: azure1961p]
      #6243004 - 12/09/13 04:03 PM

My absolute best views I have ever seen of Jupiter were in my suburban back yard in 5/5 seeing condition's in the spring time with my TOA-130 using my TV 15mm Panoptic with my 4x Powermate for about 270x, and and at 330x with my 5x Powermate again using my 15mm TV Plossls in my Denkmeier binoviewer. These are extremely rare occurrences, and happen maybe just once or twice a year at best, when the conditions just seem to be ideal. Festoons on jupiter look like waves of water, gaps between the GRS are visible, and there are clearly defined lines separating the bands. Following a night like this, everyone in the forums talk about the exceptional seeing conditions and how they were able to get incredible views out of their gear.
Generally, Jupiter hits the ceiling at around 200x to 250x for me on very good nights of 5/5 seeing conditions with my TOA. Jupiter is also beautiful in my C14, and good for 200x to 250x on ideal seeing conditions, but the best views in my refractor are better than my best views in my C14, though the contras in my C14 and colors on Jupiter are much much greater and colorful in my C14.
Above those magnifications, the razor sharp definition starts to fall off, and loses its High Definition details. Naturally, you can go as high as your scope and eyepiece will let you, but it just becomes a lost number game with no added benefit. I have a friend who's closing in on 60 years old, and he still thinks like a 12 year old in terms of magnification, and always cranks up his scopes to ridiculous high powers so every detail is lost, then brags about how his scope and gear are so great. He even does this on deep space, sometimes where something is just a blob of light, and thinks hes impressing someone. What a joke.

Saturn is usually good for 200x to 300x, because you are basically separating the bands, which have less details than the small details on Jupiter's surface. When Saturn was displaying storms on the surface ( white clouds) a few years back, my C14 was the scope I used because it also gave me more contras than my TOA and the clouds were easier to see with more aperture.

In 2003, when Mars was at opposition, Mars was excellent sometimes as high as 350x, but for now its good for 200x and getting better.

Venus with its thin crescent is beautiful at 150x, and more if you can catch it high enough in the sky when the atmosphere doesn't blur its beautiful crescent. Venus is also fun to find and show others in broad daylight. Give that a try this time of the year when its crescent is very obvious!.

Uranus and Nepture are best for me with a larger scope. Ive had beautiful views of Uranus at 435x in my C14, where its 15th magnitude moons are clearly visible and its sharp round blue disk is clearly seen.

Neptune is more of a struggle but can still be seen at those high magnifications, because all I try to do is get that blue disc as big and sharp as possible.

....Ralph


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youngamateur42
Pooh-Bah
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Reged: 11/21/12

Loc: La Verne, CA
Re: Your best magnification on planets new [Re: aa6ww]
      #6254686 - 12/15/13 03:33 PM

Cool thread! On my 6" I got Saturn up to 320x and with a Lightbridge 16" 609x on Jupiter. I could have put more magnification on but I did not have any more Barlows to do it with.

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Nerotheroman
member


Reged: 03/02/13

Loc: Germany
Re: Your best magnification on planets new [Re: youngamateur42]
      #6254808 - 12/15/13 04:46 PM

In my area seeing conditions are most of the time pretty good.

When doing planetary observations with my 10" Dobson,
for Jupiter I tend to use magnifications between 120 and
250.
Venus mostly 90-150 and Saturn usually 200-350.

The highest magnification I used so far was 350 on Saturn.
This night Saturn would have taken more than this I think,
but that is all I could offer
Unforgettable views! Details in the clouds, cassini division clearly visible and the whole planet showed a nice color tint.


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azure1961p
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Reged: 01/17/09

Loc: USA
Re: Your best magnification on planets new [Re: Nerotheroman]
      #6254919 - 12/15/13 05:47 PM

Justin, it sounds like that 16" is a keeper to be sure.

Pete


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contrailmaker
Pooh-Bah


Reged: 01/02/09

Re: Your best magnification on planets new [Re: azure1961p]
      #6255052 - 12/15/13 07:18 PM

Conditions in the Arizona desert typically allow 200-260x and occasionally much higher.

My best so far has been about 600x on Jupiter with a 22" Dob in truly excellent seeing. The detail on the planet rivaled some of the processed pictures I have seen.

I topped at 535x on Jupiter and Saturn a few times with my old C8 when the atmosphere allowed with very good results.

One of my best view of Saturn so far has been with the Clark 24" refractor at Lowell observatory also at around 500x. I don't think pictures do Saturn justice, especially on ring detail.

CM


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Asbytec
Guy in a furry hat
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Reged: 08/08/07

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Re: Your best magnification on planets new [Re: contrailmaker]
      #6255106 - 12/15/13 07:52 PM

I'm with Nero on this one, his magnifications seem optimal. Mars can take, and might even benefit from, a bit higher into the 400x range. Jupiter for me, much over 250x becomes dim and looses a lot of contrast. It's best around 25x (best) to 40x per inch (max) depending on conditions.

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nirvanix
Carpal Tunnel


Reged: 06/07/07

Loc: Saskatoon, SK
Re: Your best magnification on planets [Re: Asbytec]
      #6255139 - 12/15/13 08:09 PM

My best look at Jupiter came at 280x. It doesn't need much more than this to see it's features. Mars on the other hand let me throw 416x at it with good success back during it's last closest approach. Saturn I've done 416x in perfect seeing this year 5am on my birthday. The one and only time I've seen Enke division and 6 moons. What a birthday present.

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James Cunningham
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Reged: 08/07/10

Loc: Maryland
Re: Your best magnification on planets new [Re: nirvanix]
      #6259504 - 12/18/13 06:26 AM

Although I am not new at observing DSO's, I am new at planetary observing. When you talk of 27x per aperture or plain 200x, what is the "X" and how do I find it for my 6. Inch refractor? I only do imaging now and would be using a Samsung 2000 camera. I also have a 2x and a 3x Barlow. Thanks.
Jim


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brianb11213
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Reged: 02/25/09

Loc: 55.215N 6.554W
Re: Your best magnification on planets new [Re: James Cunningham]
      #6259562 - 12/18/13 07:41 AM

Quote:

Although I am not new at observing DSO's, I am new at planetary observing. When you talk of 27x per aperture or plain 200x, what is the "X" and how do I find it for my 6. Inch refractor? I only do imaging now and would be using a Samsung 2000 camera. I also have a 2x and a 3x Barlow. Thanks.
Jim



Magnification - visual - focal length of objective divided by focal length of eyepiece. Magnification - imaging - is essentially just the effective focal length of the scope (after any focal extenders / barlows / teleconverters / powermates are taken into account) though the pixel size also has an impact. Too much focal length, too faint an image so the seeing ruins it. I don't know the pixel size of your camera but you want to be working at somewhere around f/25 - f/30 to get max detail from most cameras. A bit less for Jupiter of Saturn because of the relative surface faintness.


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