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Equipment Discussions >> Refractors

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clayton61
member


Reged: 10/29/12

Yikes
      #5569380 - 12/13/12 02:29 PM

looking at any star that is brighter than magnatude 5 thru my lunt 80ed the stars are flaring and spiking could it just be out of colamation?

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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Yikes new [Re: clayton61]
      #5569409 - 12/13/12 02:51 PM

Does the view change if you switch eyes? If so the issue is in your eye.
Does the view get better without a diagonal? What does the diagonal mirror look like?
Is there a filter in the scope? Try it without the filter?
Can you try different eyepieces?
Are you observing from/over buildings, cooling parking lots, etc.?


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clayton61
member


Reged: 10/29/12

Re: Yikes new [Re: Thomas Karpf]
      #5569528 - 12/13/12 04:17 PM

No,it does not matter which eye I use ,the diagonal is clean ,but have not tried it without one ,no filters same problem with different eyepieces .Lunt told me that some of the 80s have three screws to adjust the lenses others were glued in but I dont have any experience so they told me to send it back and they would fix it,if I wanted

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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Yikes new [Re: clayton61]
      #5570415 - 12/14/12 07:36 AM

Okay.

Is the 'flare' stable or fluctuating?

Stable = something wrong in the equipment.
Fluctuating = something in the environment.


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Jim7728
Postmaster
*****

Reged: 04/10/05

Loc: Stoop Landing Observatory, NYC
Re: Yikes new [Re: clayton61]
      #5570448 - 12/14/12 08:28 AM

A star test will confirm if it's not collimated

http://www.spacealberta.com/equipment/refractor/collimate.htm


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clayton61
member


Reged: 10/29/12

Re: Yikes new [Re: Jim7728]
      #5570505 - 12/14/12 09:15 AM

The flare does not decrease or increase in brightness or move if thats what you are saying.

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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Yikes new [Re: clayton61]
      #5570527 - 12/14/12 09:34 AM

Quote:

The flare does not decrease or increase in brightness or move if thats what you are saying.




What magnifications are you using when you see this? Do you see it in other telescopes?

Flaring and spiking at low magnifications is often caused by a small amount of astigmatism in the observer's(your) eye.

Jon


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clayton61
member


Reged: 10/29/12

Re: Yikes new [Re: Jon Isaacs]
      #5570572 - 12/14/12 10:08 AM

I,just have the one scope right now.My magnifications are 17.5x,22x,28x,70x plus a 2x barlow but it occurs in every plossl even the 8mm,70x which is close to a 1mm exit pupil.

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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Yikes new [Re: clayton61]
      #5570656 - 12/14/12 11:01 AM

Quote:

I,just have the one scope right now.My magnifications are 17.5x,22x,28x,70x plus a 2x barlow but it occurs in every plossl even the 8mm,70x which is close to a 1mm exit pupil.




Clayton:

That doesn't sound like your eye, something else is going on, it doesn't seem right to me. It might be worthwhile having someone else with more experience with refractors take a look through it before you send it back.

When I first got my beloved 60mm F/13.3 Asahi-Pentax, it had a lot of coma. Someone had flipped one the objective lenses. Once I got that straightened out, it turned out to be a remarkable scope...

Jon


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clayton61
member


Reged: 10/29/12

Re: Yikes new [Re: Jon Isaacs]
      #5570697 - 12/14/12 11:35 AM

Lunt said they would fix the problem what ever it was for free because of the warranty ,plus I really dont know of anyone around that lives close by that has such experience.

Edited by clayton61 (12/14/12 11:36 AM)


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tubehead999
scholastic sledgehammer
*****

Reged: 11/25/08

Loc: Kennesaw, GA
Re: Yikes new [Re: clayton61]
      #5570744 - 12/14/12 11:57 AM

Good company. Let them replace or adjust under the warranty.

If you or someone else fools with it...the warranty is history.

Send it back sir.


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dan_h
Carpal Tunnel


Reged: 12/10/07

Re: Yikes new [Re: clayton61]
      #5570759 - 12/14/12 12:07 PM

Quote:

The flare does not decrease or increase in brightness or move if thats what you are saying.




I believe Tom has it stated as simple as it gets.

<< Is the 'flare' stable or fluctuating?

Stable = something wrong in the equipment.
Fluctuating = something in the environment. >>

Fluctuating means wavering, increasing or decreasing in length, swaying from one position to another, pulsating, etc. Any motion at all is pretty typical of environmental issues in a refractor.

If there are flares out the side of star images and they are always in the same position and they are not wavering or moving, there is something wrong with the lens.

It is unlikely that the tube is bent or a diagonal is so badly out of wack that these issues arise and you can't otherwise see the damage. Spend the money on postage to send it back. If nothing else, it will buy you peace of mind that you may not get any other way.

dan


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clayton61
member


Reged: 10/29/12

Re: Yikes new [Re: dan_h]
      #5570799 - 12/14/12 12:42 PM

Thank you all for youre advice I believe I will just let Lunt take care of it, all in all its a decent scope ,does show some color on jupiter but not to bad ,the double cluster was quite beautiful as you could pick out each star color ,the seven sisters as well ,m42 was pretty with five stars in the nebula was visible but the fifth was going in and out also m31 shown three degrees ,extended across the whole field of view in the 32mm plossl.

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