It's official..
- swisswalter
- Way More Fun to Share It!!
- Posts: 17948
- Joined: Thu Feb 06, 2014 4:28 am
- Location: Switzerland
- Been thanked: 1 time
- Contact:
Re: It's official..
Hi John
I'm sorry to hear about the reflection problems. Once more we need a source for bigger payable ERFs.
I'm sorry to hear about the reflection problems. Once more we need a source for bigger payable ERFs.
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
- swisswalter
- Way More Fun to Share It!!
- Posts: 17948
- Joined: Thu Feb 06, 2014 4:28 am
- Location: Switzerland
- Been thanked: 1 time
- Contact:
Re: It's official..
Hi John
I'm sure you could as long as you do striktly imaging, but that leaves you still with the warranty problem
I'm sure you could as long as you do striktly imaging, but that leaves you still with the warranty problem
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
- solar
- Way More Fun to Share It!!
- Posts: 2544
- Joined: Sun Mar 24, 2013 7:13 pm
- Has thanked: 192 times
- Been thanked: 1245 times
Re: It's official..
Don't give in yet John. The image is not too bad really.
You could sell the other two anyway and get a 150MM.
You could sell the other two anyway and get a 150MM.
Vixen 130ss SolarMax 90 BF30 EQ6 Pro, LX200 14, C8 CG5, Megrez80, Lunt 100 DS. EQ 8
ASI 120mm 290mm 432mm Lunt B1800 Cal-K + other stuff.
Skywatcher 150mm PST Mod2
ASI 120mm 290mm 432mm Lunt B1800 Cal-K + other stuff.
Skywatcher 150mm PST Mod2
- michael.h.f.wilkinson
- Way More Fun to Share It!!
- Posts: 2559
- Joined: Wed Jul 11, 2012 8:36 pm
- Been thanked: 1 time
Re: It's official..
Sorry to hear of the difficulties. I think I have a similar problem in my own Frankenscope attempt. I do get details, but they do not snap into focus, and there seems to be a lot of glare. I first thought spherical aberration might be to blame, as the Frankenscope is based on an ST80 combined with a -174mm meniscus lens. This faster set-up could add SA. Stopping down the scope did not change anything, which all but rules out SA. Misalignment could be a problem, but I could not get any setting to work (besides, I spotted a flare on the limb which was showing good detail). I can remove the front ERFof my LS35 to prevent interference with the internal 60mm ERF inside the ST80 tube, but that did not help either. I am not sure if this internal ERF is tilted properly to prevent internal reflections between ERF and objective causing trouble. I will ensure it is tilted next time round, or try the 60mm front mounted. If that fails, I can use the 85mm triband I havefront mounted. If that fails I will give up on this configuration.
Solar kit: GP-C8 with Thousand Oaks Solar filter, APM 80mm F/6, Lunt Herschel Wedge, Solar Spectrum 0.3Å H-alpha filter, Beloptic Tri-Band ERF (80mm free aperture), Thousand Oaks 90mm ERF, Coronado SolarMax II 60mm with Double Stack Unit. Lunt straight B1800 Ca-K module.
- Montana
- Librarian
- Posts: 34563
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17672 times
- Been thanked: 8793 times
- marktownley
- Librarian
- Posts: 42274
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20442 times
- Been thanked: 10248 times
- Contact:
Re: It's official..
What is the focal ratio of the 127mm lens John?
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- marktownley
- Librarian
- Posts: 42274
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20442 times
- Been thanked: 10248 times
- Contact:
Re: It's official..
Whats the distance from the front of the Lunt ERF to the back of the 127mm objective?
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- marktownley
- Librarian
- Posts: 42274
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20442 times
- Been thanked: 10248 times
- Contact:
Re: It's official..
Ahh no, sorry, meant the fixed ERF in the Lunt60 module mate.
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- marktownley
- Librarian
- Posts: 42274
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20442 times
- Been thanked: 10248 times
- Contact:
Re: It's official..
Where I was going with this John; if the Lunt PT module was too close to the 127mm lens then you could be getting scattering from the periphery of the Lunt PT unit because the light cone is too large for the aperture of the module, which could be causing the ghosting? When you're running it stepped down to 85mm the light cone would be of smaller diameter and hence possibly not vignetted / scattered (?)
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
-
- Ohhhhhh My!
- Posts: 87
- Joined: Sat Jun 02, 2012 5:20 pm
- Has thanked: 1 time
- Been thanked: 5 times
Re: It's official..
Maybe you could insert a polarized filter between both erf that you turn to minimize the reflection. Photo filters are cheap and should have the right size. Hope they have enough quality.
Re: It's official..
Make sure it is a circular Polaroid. You will loose light, but it will cancel out the reflection between the two mirrors.
Mark W.
Mark W.
- Carbon60
- Way More Fun to Share It!!
- Posts: 14209
- Joined: Wed Mar 07, 2012 12:33 pm
- Location: Lancashire, UK
- Has thanked: 8418 times
- Been thanked: 8165 times
Re: It's official..
Hi John,
Hopefully you've identified the cause of the problem and implemented the cure. Good luck.
Stu.
Hopefully you've identified the cause of the problem and implemented the cure. Good luck.
Stu.
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
- marktownley
- Librarian
- Posts: 42274
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20442 times
- Been thanked: 10248 times
- Contact:
Re: It's official..
Good to hear there's a resolution
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!