Art Fritzson
sage
   
Reged: 01/29/05
Posts: 315
Loc: Northern Virginia, USA
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Quote:
What magnification? I haven't tried looking through my Vixen 10x42 ED at Jupiter yet, but it doesn't show flaring on bright stars.
Magnification 8-12 - something that can be hand held.
Thanks -
- Art
-------------------- 2006 "Bagging on a Budget" Award for Excellence in Binocular Astronomy
Garrett 25x100 IF, Oberwerk 15x70, Celestron Noble 10x50, Meade 10x50 and 8x42 Travelviews
William Optics Zenithstar II 80mm APO
Teleport 10" - an incredible all-in-one Planetary/DSO/"Grab and Go"
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milt
sage
   
Reged: 09/13/04
Posts: 430
Loc: Arizona
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Quote:
I daresay some people walk around with the equivalent of random spider vanes in their lenses.
Thanks Peter,
That explains a LOT. My ophthalmologist tells me that my cataracts are in the very early stage (I know they'll get worse). Also, to the extent that they are in the periphery of the lenses they would only be noticeable at night. The time I noticed spikes from headlights was when my wife was driving along a dark road and I was looking out the window at the stars (natch). When I swung back and looked a headlight in the eye I saw the spikes.
Your post prompted me to go back and check the late Walter Scott Houston's experience following his lens replacement. He didn't mention radial spikes, but he was able to see the central stars in planetary nebulae much easier.
Best regards, Milt
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milt
sage
   
Reged: 09/13/04
Posts: 430
Loc: Arizona
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Quote:
Any suggestions in the, say, $300-$600 range?
Hi Art,
If you could stretch the upper end to $750 and still find a new Zeiss 10x40 Classic I think you would be pleased. One of the things that separates mine from my old Nikon is that the Zeiss is better able to focus a bright star to a tiny ball. You could also watch for used high-end binoculars.
Good luck, Milt
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Glassthrower
Vendor - Galactic Stone & Ironworks
   
Reged: 04/07/05
Posts: 14682
Loc: Hurricane Alley
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So far, the accepted causes of "flaring" and "spiking" are :
1) eye fatigue
2) individual flaws present in the eye
3) flaws present on eyeglass lenses or contact lenses
4) astigmatism of the eye
5) "lower" quality optics (i.e. budget Chinese) that may be exhibiting flaring or spiking due to :
--- a) pinched objective lenses (over-tightened cell)
--- b) insufficient or improper polishing of the lens
--- c) some other deficiency in the optical train
6) inability to achieve optimum focus
I gather that this is not a simple issue with a single cause and effect.
On a side note : I will be ordering new prescription lenses for my nearsightedness. I wear my glasses while observing. And this is the first pair I will ever buy with astronomy in mind. I'd like to ask Pete a few questions in PM about eyeglass lens types - if he doesn't mind humoring me.
Clear dark skies....
MikeG
-------------------- Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.
Galactic Stone & Ironworks - Buy/Sell/Trade Meteorites, Moon Rocks, Mars Rocks, & 35 different falls and types!
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Art Fritzson
sage
   
Reged: 01/29/05
Posts: 315
Loc: Northern Virginia, USA
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Quote:
If you could stretch the upper end to $750 and still find a new Zeiss 10x40 Classic I think you would be pleased.
I think I would...and just think how smug Kenny would be!
Thanks for the recommendation -
- Art
-------------------- 2006 "Bagging on a Budget" Award for Excellence in Binocular Astronomy
Garrett 25x100 IF, Oberwerk 15x70, Celestron Noble 10x50, Meade 10x50 and 8x42 Travelviews
William Optics Zenithstar II 80mm APO
Teleport 10" - an incredible all-in-one Planetary/DSO/"Grab and Go"
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Joad
Wordsmith
   
Reged: 03/22/05
Posts: 11919
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Quote:
So far, the accepted causes of "flaring" and "spiking" are :
1) eye fatigue 2) individual flaws present in the eye 3) flaws present on eyeglass lenses or contact lenses 4) astigmatism of the eye 5) "lower" quality optics (i.e. budget Chinese) that may be exhibiting flaring or spiking due to : --- a) pinched objective lenses (over-tightened cell) --- b) insufficient or improper polishing of the lens --- c) some other deficiency in the optical train 6) inability to achieve optimum focus
I gather that this is not a simple issue with a single cause and effect.
On a side note : I will be ordering new prescription lenses for my nearsightedness. I wear my glasses while observing. And this is the first pair I will ever buy with astronomy in mind. I'd like to ask Pete a few questions in PM about eyeglass lens types - if he doesn't mind humoring me.
Clear dark skies....
MikeG
Nice summary GT.
I'll add, for Shiv, that sometimes I see rather badly what I think we all mean by "flaring" on bright objects at night (Mag 1 stars and Jupiter) with my 45° 100mm Oberwerks, and sometimes not so badly. I think it has something to do with good, but not perfect, optics in the Obies, but also with whether my eyes are tired or not and how I place them at the oculars. I do find that with a little effort I can partially control flaring. Interestingly, the moon, which is the brightest object of them all, shows up sharp and crisp with my Obies, with no flaring and virtually no chromatic aberation.
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shiv
journeyman
Reged: 05/05/06
Posts: 9
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Hiya guys Just got back from my little trip. Well I ended up driving about 50 miles to the best location for stargazing in the southern part of the state. Very clear night about 45 degrees and I spent about 3 hours viewing. I didnt see any flaring like I did the first time I went out. I am guessing it was from eye fatigue so I am real happy. The 45° 100mm Oberwerks pull in stars great! I'm looking forward to taking them out again. Thanks for the replies.
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Glassthrower
Vendor - Galactic Stone & Ironworks
   
Reged: 04/07/05
Posts: 14682
Loc: Hurricane Alley
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Shiv -
Welcome to CN (I forgot the welcome earlier!) ...
That big Obie 100mm you have is a nice instrument - the consensus around here regarding it is positive. Even the best instruments are subject to the limitations of the human eye.
Good luck and clear dark skies...
MikeG
-------------------- Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.
Galactic Stone & Ironworks - Buy/Sell/Trade Meteorites, Moon Rocks, Mars Rocks, & 35 different falls and types!
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btschumy
Think Astronomy
   
Reged: 04/13/04
Posts: 1110
Loc: Austin, TX, USA
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Quote:
I am guessing it was from eye fatigue so I am real happy.
Looks like Edz called it right. I guess 20 minutes wasn't enough.
-------------------- Bill Tschumy
Where is M13? Freeware -- Add a new dimension to your observing.
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EdZ
Professor EdZ
   
Reged: 02/15/02
Posts: 12565
Loc: Cumberland, R I , USA42N71.4W
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That would be by luck and a wild guess on my part Bill, if that's what it was.
edz
-------------------- Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
member#21
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shiv
journeyman
Reged: 05/05/06
Posts: 9
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Quote:
Shiv -
Welcome to CN (I forgot the welcome earlier!) ...
That big Obie 100mm you have is a nice instrument - the consensus around here regarding it is positive. Even the best instruments are subject to the limitations of the human eye.
Good luck and clear dark skies...
MikeG
Thanks for the welcome MikeG.
I am really impressed with the obie 100mm, the build looks and feels very high quality. I have been researching this buy for about 6 months and it was the information I gained here that sealed the deal. A lot of good posts and people here. Some of you should get a cut of sells.
I did get slightly embarrassed and amused at EdZ irratation, " real or imagined" at my quikness to ponder a possible problem. But I understood it. But EdZ posts and others here were a big factor in my purchase. EdZ posts and others I have read here are very detailed look pro and non biased, very trustworthy. So I sought help here.
Even though stargazing has been a life time dream for me I have never looked thru a telescope or a pair of quality binoculars. So I have been trying to learn what to look for in defects and how binoculars with no defects perform so that I would not mistake one for the other. I plan on taking a lot of trips stargazing this summer the main place is cherry springs that is a 6 hour drive so I want to make sure everything is in working order so that I get the best and proper views and not look like an idiot for driving 6 hours with a defective pair of binoculars when someone in the know looks thru them.
Any company even with a good rep can let a defective product slip by it can be rare with the best companies. I work in a factory so I knows this happens no matter how hard people try.
When I saw the radial spikes the first night out I was concerned. This thread kinda got me worried but I knew that if I did have a problem that Kevin from Oberwerk has a good reputation for taking care of his customers, another selling point. But I did think it was a good idea to take them out again and the comments here helped me confirm that but I would have takin them out regardless.
The reason I only looked thru them for 15 mins was because my wife and daughter were spooked by the location we were at. I wanted this to be a pleasant family affair when we go out star gazing so I didnt get mad and I packed up and left. It was the best location for viewing within 25 miles of my house, the moon wasnt out and the skies were clear but it did look like the location of chain saw massacre was filmed there.
I should have explained in more detail but my time was short and I was being a little shy. My fault.
So thanks for the replies and help, I plan on lurking here for years and learning as much as possible.
I also plan on keeping my Obie 100mm forever and it will look good next to my dob I want to get in a year or two.
shiv
Edited by shiv (05/09/06 03:48 AM)
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KennyJ
   
Reged: 04/27/03
Posts: 10142
Loc: Lancashire UK
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Shiv ,
Thank you for taking the time to thank people here for their efforts , and for helping us all " get to know you " a little more !
I'm sure everyone here is pleased that you are now another satisfied customer .
Keep in touch !
Kenny
-------------------- Two eyes and a preference to use both
Zeiss 7 x 42 BGAT
Captain's Helmsman 7 x 50
Nikon 10 x 42 Superior E
Swift Audubon Kestrel 10 x 50
Helios 15 x 70 Observation
Strathspey 20 x 90
Televue 76 APO
Zeiss 85 Diascope
Helios 102 f5 refractor
Various eyepieces barlows tripods mounts etc.
Panasonic Lumix DMC - TZ5 digital camera
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