Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

stargazine_ep33_banner.thumb.jpg.75d09b4b1b4e5bdb1393e57ce45e6a32.jpg

Russe

Imaging with the 130pds

Recommended Posts

On 25/05/2020 at 01:17, matt_baker said:

The left side stars look pretty similar to me

Hi

 The effect is astigmatism and is common in the Baader cc. Centre field you're in focus. Left is due to inward focus error, right, outward focus error. Or vica versa. The in and out focus errors are because the camera's isn't held squarely in the light path. Even if it is, in my experience, there is still astigmatism.

Astigmatism causes the 90º rotation of star elongation you are seeing toward lateral extremities and is also responsible for the uneven cross shape in the astigmatic stars. 

If you can't live with it and correction in software isn't acceptable, either the 2 element sw or the 4 element gpu or GSO ccs would fix it. You could also try substituting the secondary mirror or using a camera with a smaller sensor.

HTH and good luck.

 

 

Edited by alacant

Share this post


Link to post
Share on other sites

I have suffered from tilt for an age and can never be sure if is camera, focus tube or poor collimation or possibly all three adding up.

Not sure if anyone here has one or tried one but this adaptor might be of use. For only about £45 its worth a go but I think it will only work with the baader mpcc.

Share this post


Link to post
Share on other sites
3 hours ago, alacant said:

Hi

 The effect is astigmatism and is common in the Baader cc. Centre field you're in focus. Left is due to inward focus error, right, outward focus error. Or vica versa. The in and out focus errors are because the camera's isn't held squarely in the light path. Even if it is, in my experience, there is still astigmatism.

Astigmatism causes the 90º rotation of star elongation you are seeing toward lateral extremities and is also responsible for the uneven cross shape in the astigmatic stars. 

If you can't live with it and correction in software isn't acceptable, either the 2 element sw or the 4 element gpu or GSO ccs would fix it. You could also try substituting the secondary mirror or using a camera with a smaller sensor.

HTH and good luck.

 

 


Think the 4 element cc is same as sw’s own apalanatic cc, at least similar. Bit pricier but really great results. I got mine for the f4 imaging Newtonian, thought why not try it on the 130pds and am very happy I tested it

Share this post


Link to post
Share on other sites
2 minutes ago, lnlarxg said:

4 element cc is same as sw’s own

Hi

Yes, the gpu and the sw have the same prescription, differing only in the fixed flange on the latter.

Cheers

Share this post


Link to post
Share on other sites
1 hour ago, Stub Mandrel said:

Don't forget you can adjust the tilt of the 130P-DS focuser tube

I didn't know you could do that. Are you able to explain how this is done and can it be done with everything attached?

Cheers

  • Like 1

Share this post


Link to post
Share on other sites

A bit of late night Ha imaging :)   NGC6820

Just 90min, I'll pick this up again in a few weeks when I wont have to wait so late for it to clear the tree.

NGC6820_100.thumb.jpg.3bb711f54b44e1c3de3ea50573c3e5cc.jpg

 

  • Like 8

Share this post


Link to post
Share on other sites

Fixed my issue, the tension needed tightening up thank you all

I have a project for a HARGB ( first time trying) this is my first 2 hours from 8 planned.( 4 HA 4 RGB) of the elephant nebula . Nothing but stacked just to see what it was like so far . Canon DSLR with the 130pds 

elephant_R.png

Edited by Dan13
  • Like 4

Share this post


Link to post
Share on other sites

How worth it would it be to get a moonlite focuser for the 130PDS vs buying a used 80mm triplet?

Share this post


Link to post
Share on other sites

Thought I would post up this attempt.

Ha, Oiii, Oiii. About 10 hours over the last few days. ASI1600. I have some issues that need sorting but may end up adding some Sii. Tiff seemed to large so just a jpeg.

broom.thumb.jpg.97947ba5853ac3ed0b9cb7ecf1af5847.jpg

 

 

 

Edited by spillage
  • Like 7

Share this post


Link to post
Share on other sites

How do you have your scopes rotated so the camera sits on top ,hangs on the side,or hangs underneath?

Thanks

Share this post


Link to post
Share on other sites

I just let the balance of the third axis tell me where it needs to sit, but at the moment its happier sat underneath (more or less).

Edited by spillage
  • Thanks 1

Share this post


Link to post
Share on other sites

This is a great thread. I've been through it over the last week or so. Some fantastic images but sadly I can't join in with any as I'm unable to get a 130pds anywhere at the minute. These thing seem to be as rare as Rockin' Horse Thingy! I hope they haven't been discontinued.

Share this post


Link to post
Share on other sites
3 minutes ago, Jamgood said:

This is a great thread. I've been through it over the last week or so. Some fantastic images but sadly I can't join in with any as I'm unable to get a 130pds anywhere at the minute. These thing seem to be as rare as Rockin' Horse Thingy! I hope they haven't been discontinued.

I'm quite possibly selling mine with the CC and extras as soon as I can get hold of my next scope. Will bare you in mind mate . It's less the 5 months old 

Edited by Dan13
  • Like 1

Share this post


Link to post
Share on other sites
37 minutes ago, Fieldsy said:

How do you have your scopes rotated so the camera sits on top ,hangs on the side,or hangs underneath?

Thanks

I have an ankle weight on the back end on the opposite side to the cam. Does wonders 

  • Like 1

Share this post


Link to post
Share on other sites
8 minutes ago, Dan13 said:

I have an ankle weight on the back end on the opposite side to the cam. Does wonders 

I have a ankle weight wrapped around the back so that it isn't so front heavy ,but I like the idea of counter weighting the camera, filter wheel will try that.

  • Like 1

Share this post


Link to post
Share on other sites

To help with the DEC balance I have a sturdy flat steel bar with several holes drilled into it. This is bolted to top of the rings with a rear over hang. I use this to attach the guide scope and it allows me to bolt a sufficient weight to the rear. It's definitely a diy job but it has worked for a couple of years now.

  • Like 1

Share this post


Link to post
Share on other sites
3 hours ago, Fieldsy said:

How do you have your scopes rotated so the camera sits on top ,hangs on the side,or hangs underneath?

Thanks

on the side to get the C of G as close to the mount as possible.

  • Like 1

Share this post


Link to post
Share on other sites
5 hours ago, Fieldsy said:

How do you have your scopes rotated so the camera sits on top ,hangs on the side,or hangs underneath?

Thanks

This way up  ;)

20190813_183852.thumb.jpg.d8902e0718901d49cb860124c50a7105.jpg

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites
5 hours ago, Jamgood said:

This is a great thread. I've been through it over the last week or so. Some fantastic images but sadly I can't join in with any as I'm unable to get a 130pds anywhere at the minute. These thing seem to be as rare as Rockin' Horse Thingy! I hope they haven't been discontinued.

I got one from FLO a couple of weeks ago, there's just about a 10day or so delay before delivery.

  • Like 1

Share this post


Link to post
Share on other sites

Hello, I'm just starting out and had a q :) 

I'm considering a SW 130PDS - has been popular for a number of years. 

Is there a consensus on what's the best budget mount for this scope?

I know the SW star adventurer is very popular, but it won't take this lvl of payload.

So is there any mounts that would go well with this scope - something cheaper than a HEQ5 😛

 

Share this post


Link to post
Share on other sites
39 minutes ago, Kenboy said:

Hello, I'm just starting out and had a q :) 

I'm considering a SW 130PDS - has been popular for a number of years. 

Is there a consensus on what's the best budget mount for this scope?

I know the SW star adventurer is very popular, but it won't take this lvl of payload.

So is there any mounts that would go well with this scope - something cheaper than a HEQ5 😛

 

If I'm being honest, the belt mod mount @Adam J is selling is a very sound investment for the long term. I'm went budget route with a mount before getting my HEQ5 and that is still my biggest regret yet. Just imo of course :)

Share this post


Link to post
Share on other sites
32 minutes ago, Dan13 said:

If I'm being honest, the belt mod mount @Adam J is selling is a very sound investment for the long term. I'm went budget route with a mount before getting my HEQ5 and that is still my biggest regret yet. Just imo of course :)

Yes it's the case for anything with a half decent aperture so 80mm refractors and over. You will want at least a HEQ5PRO. I used a 130pds on mine and I am sure a lesser mount would have been a massive pain in the bottom. The HEQ5PRO is the cheapest mount on the market that will provide consistent sub ascsecond guiding on such scopes. 

Adam 

Share this post


Link to post
Share on other sites
30 minutes ago, Adam J said:

Yes it's the case for anything with a half decent aperture so 80mm refractors and over. You will want at least a HEQ5PRO. I used a 130pds on mine and I am sure a lesser mount would have been a massive pain in the bottom. The HEQ5PRO is the cheapest mount on the market that will provide consistent sub ascsecond guiding on such scopes. 

Adam 

Fully agreed.  My pocket learned the hard way 🤣

Share this post


Link to post
Share on other sites
4 hours ago, Adam J said:

Yes it's the case for anything with a half decent aperture so 80mm refractors and over. You will want at least a HEQ5PRO. I used a 130pds on mine and I am sure a lesser mount would have been a massive pain in the bottom. The HEQ5PRO is the cheapest mount on the market that will provide consistent sub ascsecond guiding on such scopes. 

Adam 

How do you deal with focuser sag with your FW + 1600MM? 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   1 member

  • Similar Content

    • By Planetarian
      Hi, I've got a Skywatcher Heritage 130p reflector, and if i insert anything less than 10mm eyepiece, the image won't get crisp. I guess it's normal, but as I'm very new to astronomy, I'd like to know what the sharpness depends on exactly. 
      Is that the focal length (how fast the telescope is? ) or the size of the mirror and how much light it gathers? Or both affect it the same way?  
      Are things the same with refractors in this regard? Thanks. 
    • By ThadeusB
      I have for sale my Skywatcher Startravel 120. Objective lens 120mm; Focal length . It is in excellent condition, clean and only very minor marks. Clean optics, no fungus. The focusser is the original one and works smoothly; 1.25" and 2" adaptors. With both caps.
      A very good starter scope, or good as a portable scope.
      Included accessories: red dot finder; 90 degree star diagonal; 10mm & 25mm EPs; mobile phone adaptor. All in as new condition.
      Please don't ask me to split this package.
      Price £140.00 no offers.
      It will be very well packed.
      Payment: paypal or bank transfer
      I can deliver by Hermes; I can get a quotation for this if you wish. Or you can make your own courier arrangement, or collect in person.
      Please PM me if you would like more information.









    • By Quentent
      Hi,
       
      So just today i got my new EQ3 mount and tripod delivered.
      Brought it out, balanced it leveled it etc etc.
      So i polar aligned it,  and selected 2 Star Alignment.
      1st star to align to: Betelgeuse.
      As soon as i hit confirm align the motors kick in but as soon as the mount starts to rotate the motors stop and the hand controller resets itself immediatly and starts initializing all over again.
      I discovered that moving Ra on its own works just fine as does moving Dec on its own but whenever i press for example the left and Up arrows at the same time the mount stops and the hand controller resets.
      Could this just be a problem with power draw? The Synpro box takes 12V DC and is supplied by a 12V DC car outlet type power source. However i changed this to a 3 Pin UK 12V 1A DC & AC plug.
       
      Im hoping the power supply is the issue and not something else.
    • By Soulitude
      Hi everyone I am new here, I live in Perth Western Australia (bottle class 5) and have just brought my new set up. There hasn’t been anyone in the area I can talk to about astrophotography so tried to do it all myself online and I fear I may have incorrectly purchased some things. (I tried to get things one at a time for budget purposes)
      I have this set up
      heq5, evostar ed80, .85reducer & corrector, evoguide 50ed, zwo 120mm mini for guiding and just my canon 200d mkii for the imaging. 
      The telescope, I think I may have brought something that’s not great for imaging and that’s all I’ve wanted to do. 
      can you please provide a better telescope alternative that would be suitable for all my other gear without having to buy like a new mount etc. I’m thinking just a slightly better scope not too heavy, opinions would be much appreciated 💖💖💖 xx
    • By Tonny
      Hello guys  I am an absolute amateur buying his first telescope... and I am desperate, please help.
      My budget is around 1300 euro (1600$). I am interested mostly in DSO... astrophotography, but observing as well. 

      So refractors are better for astrophotography, crisp clear views, plus they are low maintenance... but refractors with big aperture are too expensive, apo refractors even more... and I think that I want big aperture, because I am interested in observing as well, not only astrophotography. Sooo more light, more details, more magnification. Please correct me, if I am mistaken.
      Also, I know the mount is really important for photography, but these scopes comes with mounts that maybe are not the best, but are they good enough? 

      I am considering these three options now:
      1. https://www.astroshop.eu/telescopes/skywatcher-telescope-n-200-1000-explorer-bd-neq-5-pro-synscan-goto/p,20291#tab_bar_1_select 
      2. https://www.astroshop.eu/telescopes/bresser-telescope-ac-152-760-ar-152s-messier-hexafoc-exos-2-goto/p,14209#tab_bar_2_select 
      3. https://www.astroshop.eu/telescopes/bresser-telescope-ac-127l-1200-messier-hexafoc-exos-2-goto/p,14206

      Bresser 127 have smaller aperture, but very good reviews... on the other hand Skywatcher have nice reviews as well and bigger aperture.
      Bresser 152 sounds really nice, but is a bit expensive, and as long as I have to buy an eyepiece, nebula filter, adapter for my DSLR, maybe this CA correcting filter... it will goes above my budget and I don't know if it deserve it, and again - Skywatcher wouldn't be better?
      The only thing that censers me about the Skywatcher is that collimation thing every time and that it could be too complicated for a newbie (that is what I read about big reflectors)... usually this kind of things wouldn't scare me, I mean how complicated it can be... If it is the better telescope than it deserve a little more maintenance?

      Since I am not going to be a professional, I want to observe and take photos just for fun - I know I have to compromise with something for this price... I am just very confused after all I read.... And as I said, I am a newbie never took a look trough a telescope, so I trust Internet and I am ready to buy the first telescope someone advise me  
      I don't thing I could afford buying telescope again any time soon, that is why I want something good, that I wouldn't need to change and be happy with it for maaany years.
      Please correct me, if I am wrong with all these and if there is a better telescope for me?

      Thanks in advance!  
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.