nightshooter
sage
Reged: 04/09/07
Posts: 324
Loc: South Shore, Long Island, NY
|
|
Need some help & or advice. Just set up with my LS50Fha
and am not getting an single image when viewed thru the eyepiece. It looks like about 10 images stacked behind one another. I couln't take a half way decent shot so I did a drawing of it. Any help would be much appreciated.
Thanks much .
--------------------
Rich
AT 80ED
Vixen GP2
Vixen A80SSWT
DMK 21AU04.AS
Lunt 50F / B1200
|
astrosurf
Vendor
Reged: 02/13/08
Posts: 112
|
|
Hi Rich
deffinately call Lunt straight away something doesnt seem right here. Have you tried different eyepieces? and are you using barlows or any other optical device?
rich best
www.bestastroimages.co.uk
--------------------
http://www.startelescopes.co.uk/
STAR TELESCOPES
01273 812926
|
Paul Hyndman
sage
Reged: 07/13/04
Posts: 312
Loc: Madison, CT USA
|
|
Is the blocking filter in place and intact?
I've had a few "oops!" while changing over cameras etc. during sessions, neglecting to reinstall the BF... multiple images are typical without one.
--------------------
AP160, AP Traveler,
Coronado 90/90/30, PST H-a, PST CaK,
Baader Wedge, 260mm Kendrick/Baader,
Fraunhofer circa 1820, Fraunhofer circa 1825,
SBIG STL11K, DSI Pro (2), DSI Pro II, Canon 10D,
ToUcam II 840, AP900 GTO, AP Mach1
|
nightshooter
sage
Reged: 04/09/07
Posts: 324
Loc: South Shore, Long Island, NY
|
|
Yes, I have tried different ep's and the blocking filter looks fine. I've tried different barlows with and with out the lens just using the tube length and it dosn't help.
--------------------
Rich
AT 80ED
Vixen GP2
Vixen A80SSWT
DMK 21AU04.AS
Lunt 50F / B1200
|
Sol
Carpal Tunnel
Reged: 08/20/07
Posts: 2026
Loc: Powys, Wales, UK
|
|
Is there any play in the BF diagonal, is it tilted at all in the drawtube ? Is the filter/filter adaptor fitted so that it is perfectly in line with the refractor optics ? Probably best to give Lunt a call as Richard says if all of the above are OK.
Mark
--------------------
Visit the Sunnymeade Astro Solar Blog
http://sunnymeadeastro.blogspot.com/
|
Solar B
Pooh-Bah
Reged: 02/28/07
Posts: 1013
Loc: By Edinburgh , Scotland
|
|
It could be De-contacting as well..hope not though.
Brian
--------------------
" Gentlemen only ever use Refractors "
|
NickH
Post Laureate
Reged: 05/09/06
Posts: 3717
Loc: Wiltshire, UK (near StoneHenge...
|
|
sounds and looks like multiple ghosting, but best to contact Lunt on this one to see what they can do.
|
DAVIDG
Carpal Tunnel
Reged: 12/02/04
Posts: 2129
Loc: Hockessin, De
|
|
Multiple ghost images are a sign that two surfaces are not perfectly parallel. This type of ghosting is common in inexpensive interference filters were the layers are not perfectly uniform in thickness and form a wedge and/or the faces of the glass are not parallel.
A simple test you can do is with the Etalon and BF installed on the 'scope and while observing the Sun, rotate the Etalon and see if the images moves with it.
- Dave
--------------------
Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schief. 60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4" f/12, 4.5" f/16 & 6" f/12 Schupmann Medial refractors, 14 Stellafane awards 7 in optics
Engineering = Taking what you have and making what you need.
|
nightshooter
sage
Reged: 04/09/07
Posts: 324
Loc: South Shore, Long Island, NY
|
|
Thanks all for the input. The image does move when I rotate the Etalon. Also the fine tuning brass wheel make no difference in the image when rotated either way.
Attached is an afocal shot (not a great one) that shows the image repeating itself.
--------------------
Rich
AT 80ED
Vixen GP2
Vixen A80SSWT
DMK 21AU04.AS
Lunt 50F / B1200
|
stephenramsden
Carpal Tunnel
Reged: 08/17/07
Posts: 1629
Loc: Atlanta, GA--USA
|
|
Hey man,
This is probably a dumb question but have you removed the eyepiece tube from the blocking filter and then put a csmera tight up to it to see if you are just not reaching focus?
--------------------
Stephen W. Ramsden
Atlanta, GA--USA
NASA SOLAR SYSTEM AMBASSADOR
www.solarastrophotography.com
www.SolarScopeReviews.com
www.stephenramsden.com
|
NickH
Post Laureate
Reged: 05/09/06
Posts: 3717
Loc: Wiltshire, UK (near StoneHenge...
|
|
That IMHO is not a focus problem, that's a ghosting issue, which I have seen on an SM40 after de-contacting (very similar in fact). Possibly just got mishandled in shipping..
|
stephenramsden
Carpal Tunnel
Reged: 08/17/07
Posts: 1629
Loc: Atlanta, GA--USA
|
|
I agree Nick it does look like a ghosting problem caused by a misaligned etalon but before he sends annything back for repairs I just thought maybe this would give a better idea what the problem is.
I have the same size refractor nd a CaK blocking filter from LUNT that would not reach focus on it.
By the way Nick, Greg P. and Larry Alvarez, I am doing a big presentation on the History of Solar observing for my Astronomy Club and was wondering if it would be OK to use some of your images. I'm good, but you guys are way better.
--------------------
Stephen W. Ramsden
Atlanta, GA--USA
NASA SOLAR SYSTEM AMBASSADOR
www.solarastrophotography.com
www.SolarScopeReviews.com
www.stephenramsden.com
|
NickH
Post Laureate
Reged: 05/09/06
Posts: 3717
Loc: Wiltshire, UK (near StoneHenge...
|
|
Stephen
It would be a real honour thank you for asking, and yes..
On the "cannot reach focus"...what gives with that?
I am considering a Lunt CaK module with the B1200 for my FL102, and want to make sure that should work okay?
|
stephenramsden
Carpal Tunnel
Reged: 08/17/07
Posts: 1629
Loc: Atlanta, GA--USA
|
|
Nick,
Refer to my recently published review:
http://www.stephenramsden.com/SOLARASTROPHOTOGRAPHY/LUNT%20CaK%20B1800%20Reviewt.html
--------------------
Stephen W. Ramsden
Atlanta, GA--USA
NASA SOLAR SYSTEM AMBASSADOR
www.solarastrophotography.com
www.SolarScopeReviews.com
www.stephenramsden.com
|
NickH
Post Laureate
Reged: 05/09/06
Posts: 3717
Loc: Wiltshire, UK (near StoneHenge...
|
|
Hmm...I have a Meade 5000 series APO at the moment on loan, that thing has masses of focus travel I thought.
Edited by NickH (09/15/08 09:44 AM)
|
nightshooter
sage
Reged: 04/09/07
Posts: 324
Loc: South Shore, Long Island, NY
|
|
Just spoke with Rikki over at Lunt. She advised me to sent it back and they will repair the filter.
I had also mentioned to her that when I shook the filter ther was a slight ratteling noise inside. She told me that there should be no type of ratteling within the filter.
Another two thumbs up for Lunt
--------------------
Rich
AT 80ED
Vixen GP2
Vixen A80SSWT
DMK 21AU04.AS
Lunt 50F / B1200
|
robert_arnold
Carpal Tunnel
Reged: 11/08/05
Posts: 1575
Loc: Isle of Skye, Scotland
|
|
Let us know how it goes. I am glad they are helping out, a really disappointing experience
good luck
Robert
--------------------
ED80 ED100 DMK31AF03 CaK-B600 LS75F/B1200
www.robertarnold.co.uk
|
Jim Rosenstock
Post Laureate
Reged: 07/14/05
Posts: 4162
Loc: MD, south of the DC Nebula
|
|
Ouch! 
My Lunt came packed in its foam-lined case, which was in a larger box with enough foam peanuts to feed my foam elephant for a week!  Everything was undamaged, thankfully....but I guess it's not always possible to "gorilla-proof" a package with delicate optics.
I'll bet that Lunt has to cover the repair/replacement themselves; I doubt that UPS will take any responsibility.
I hope that the repair is simple and quick, and that the return shipping is gentle, this time. Good luck!
Jim
|
nightshooter
sage
Reged: 04/09/07
Posts: 324
Loc: South Shore, Long Island, NY
|
|
Hi Jim,
My Lunt also arrived double boxed with peanuts but with no case.
Rikki over at Lunt told me they would only have it there for a week and ship it back.
I had mentioned to her that Coronado would insist on UPS next day air as they would pay more attention to detail with those packages. I sent it out today UPS 3rd day and told Lunt when ready to ship it back to me UPS next day.
Good luck with yours hopefully you can post some images in the next couple days.
--------------------
Rich
AT 80ED
Vixen GP2
Vixen A80SSWT
DMK 21AU04.AS
Lunt 50F / B1200
|
Jim Rosenstock
Post Laureate
Reged: 07/14/05
Posts: 4162
Loc: MD, south of the DC Nebula
|
|
Quote:
Good luck with yours hopefully you can post some images in the next couple days.
Errr...that would require three things currently in short supply here: (1) Sunshine, (2) free time at work, and (3) imaging skills! 
Before too very long, though, I promise I'll try my luck at some afocals....perhaps those won't be too much of a stretch for my limited intellect. 
I sure do love all the images you guys post here!
Cheers,
Jim
|
NickH
Post Laureate
Reged: 05/09/06
Posts: 3717
Loc: Wiltshire, UK (near StoneHenge...
|
|
1 week turnaround...wow...that's pretty good too..
Let's hope that keeps up...
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
[Re: 