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Old Scopes and Modern Imaging

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#451 LukaszLu

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Posted 15 June 2021 - 08:05 AM

OK, that's it. Not bad given the Moon was fairly low above the horizon:

 

THE-MOON-2020-06-14.jpg


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#452 Wildetelescope

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Posted 15 June 2021 - 10:27 AM

 

 
 
Jupiter and Saturn with  AP 127 mm f8 Starfire, 
 
Mars taken with Pre ED glass 152 mm F9 AP Starfire
 
JMD

 

m13stack1nrwb (1)
 
M13 taken the other night with this scope.  30 second Images were captured for a total of about 40 minutes of unguided tracking.  Old scopes are FUN!!
 
Cheers!
 
JMD

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#453 LukaszLu

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Posted 15 June 2021 - 10:28 AM

Just great!



#454 LukaszLu

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Posted 16 June 2021 - 07:33 PM

Today's shot using the Carton T-620 60 mm refractor from 1976:

 

THE-MOON-2021-06-16.jpg


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#455 LukaszLu

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Posted 17 June 2021 - 06:36 AM

Something for comparison with the pic obtained on the June the 14th: image obtained from SW 120 ED on the June the 13th, when the Moon was slightly lower above the horizon. And you can see that with poor seeing, the importance of the optics is marginal - 120 mm of modern ED apo and ... it does not even come close to what the 60 mm oldie pulled out the next day (https://www.cloudyni...9#entry11167847)

 

THE-MOON-2020-06-13.jpg


Edited by LukaszLu, 17 June 2021 - 07:24 AM.

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#456 LukaszLu

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Posted 18 June 2021 - 07:09 PM

June 18. The higher the Moon is over the horizon, the more this 60 mm oldie shows his fangs ...

 

Carton T-620 60/900 + EXOS-2 + ZWO ASI 178MC:

 

THE-MOON-2021-06-18.jpg


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#457 telesonic

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Posted 19 June 2021 - 02:00 AM

Last evening I had a good night, testing another scope. A Celestron / Vixen 80mm f/11 refractor and Vixen SP mount with manual tracking (hand knobs.) The moon was just clearing the trees, after I'd aligned and did my tests... it was off to grab the DSLR for a prime focus shot. I was set up with the tripod on the deck, so there were some vibrations....  shutter delay worked.... next time I'll try it on the pier.

 

I took 3 shots total, one was overexposed... the next was this one, which I think was the best, and one that was way darker / underexposed. Camera used is an old Olympus E-300 that we have had for many years,  and it's a 4/3 sensor. This particular picture has been cropped and adjusted slightly in iphoto, but other than that, it's a picture of the moon. It turned out much better than I thought it would, given the old equipment.... and I'm pleasantly surprised. That old scope is a keeper, I did swap my 2" focuser to the ota for this today, simple stuff. smile.gif

 

Cheers, and clear skies!

Temp

 
moon test 2

 


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#458 Borodog

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Posted 19 June 2021 - 03:34 PM

'85 C8 + ASI183MC.

 

gallery_346195_16100_160464.jpg


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#459 Borodog

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Posted 19 June 2021 - 07:59 PM

And the next night:

 

gallery_346195_16100_284879.jpg


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#460 LukaszLu

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Posted 20 June 2021 - 09:24 AM

Hello, are there any Towa doubters round here? The time of truth has come... I've just added a newly-restored Towa 6305-N (I think this is the correct name of this telescope, model also known as Sears Discoverer 3 4451) for comparison to my tests of the Carton T-620 refractor.

 

During observation, Towa gives precise, sharp images, but compared to Carton they are clearly less contrasting. Perhaps for this reason I have the impression of a trace presence of CA, which is not confirmed in the photos. It seems that in the case of photography, Carton actually gives a larger CA (not seen on the pictures due to processing). On the other hand, the weaker contrast in the case of Towa is clearly visible in the photos.

 

So far my testes seem to prove that Carton gives a greater precision of the image - not much, but still greater. It is difficult to judge it during visual observations, but it becomes visible in the photos.

 

Nevertheless, the I appreciate the quality of the Towa optics - see for yourself. Can you expect much more from a 60mm lens?

 

THE-MOON-2021-06-19.jpg

Attached Thumbnails

  • 20210429_163834.jpg

Edited by LukaszLu, 20 June 2021 - 10:55 AM.

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#461 LukaszLu

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Posted 20 June 2021 - 03:47 PM

Ok, time for the comparison that everyone was waiting for with bated breath ... Well - to be honest, I expected a more spectacular difference.

 

The truth is, Carton's advantage is not so obvious when you compare photos taken in the same session. If you look at the quality of the details, some parts look better in the photo from Towa, and others - in the photo from Carton. The former is a mosaic of three shots, and the latter - a mosaic of two. Perhaps this resulted in the uneven quality of individual parts of the photos.

 

Carton certainly gives a slightly better contrast. As a result, image processing is easier and requires less treatment, which also proves better image quality. As you can see, these are not radical differences - not the kind that we would expect based on the reputation of both manufacturers.

 

And that's all for now. Meanwhile, I will reveal that Unitron / Polarex 114 joined the tests today... And YES - I mean the famous unit with a lens improved by me (i.e. broken ...) :-)

 

I am just sitting down to process today's material, which will allow me to compare photos from Carton, Towa and Polarex. So both Towa doubters and Unitron/Polarex fans - please buy a lot of popcorn and wait for the results, which I hope to publish tomorrow!

 

Carton T-620 for comparison:

 

THE-MOON-2021-06-19c.jpg


Edited by LukaszLu, 20 June 2021 - 03:50 PM.

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#462 LukaszLu

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Posted 21 June 2021 - 07:32 AM

In the meantime, let's see what can be squeezed out of Jupiter through these 60 mm ... pic made this morning, Carton T-620 60/910 mm + ZWO ASI 178MC. Of course, this is a montage from two shots - the moons had to be photographed separately, with higher exposure time:

 

JUPITER-2021-06-21.jpg


Edited by LukaszLu, 21 June 2021 - 07:35 AM.

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#463 mdowns

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Posted 21 June 2021 - 08:01 AM

LukaszLu    can you try reattaching your astro photo jpegs? They don't seem to want to open now.Are you sure they are less than 500kb?



#464 LukaszLu

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Posted 21 June 2021 - 08:25 AM

Well - they are not attached to posts, they are embed with [img] tag and are located on my own, external server. Im trying to use Shift F5 and they display correctly...?


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#465 Bomber Bob

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Posted 21 June 2021 - 08:47 AM

If you hover the Mouse Pointer over the IMG, and Right Click, you should be able to "Open Image in New Tab" and the pix display correctly...

 

Great Shots, BTW!


Edited by Bomber Bob, 21 June 2021 - 08:48 AM.

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#466 Bomber Bob

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Posted 21 June 2021 - 08:49 AM



Well - they are not attached to posts, they are embed with [img] tag and are located on my own, external server. Im trying to use Shift F5 and they display correctly...?

Good Idea!  You can bypass the CN file size limits.



#467 LukaszLu

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Posted 21 June 2021 - 09:31 AM

Good Idea!  You can bypass the CN file size limits.

Seems to be better idea then using CN gallery images, that are limited to 1600 px, which is far to low in many situations.


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#468 semlin

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Posted 21 June 2021 - 11:22 AM

well this is my first effort at astrophotography.  60mm tasco 7te-5 shot with an olympus dslr mirrorless.  some cropping and tweaking using the ipad photo app edit options.  

Attached Thumbnails

  • 3838D824-2988-4D63-AA5E-005006818415.jpeg

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#469 semlin

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Posted 21 June 2021 - 11:25 AM

one more.  these are jpeg.  i will need to clear some photos off my ipad to make room to reinstall photoshop so i can process raw images.  

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  • 227F4BBD-19EE-43B0-9B4D-E7A78690FCF3.jpeg

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#470 semlin

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Posted 21 June 2021 - 11:29 AM

In the meantime, let's see what can be squeezed out of Jupiter through these 60 mm ... pic made this morning, Carton T-620 60/910 mm + ZWO ASI 178MC. Of course, this is a montage from two shots - the moons had to be photographed separately, with higher exposure time:

 

 

 

very nice.  jupiter is rising behind a big tree at 2am for me.  i am dying to try it out.


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#471 LukaszLu

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Posted 21 June 2021 - 05:57 PM

very nice.  jupiter is rising behind a big tree at 2am for me.  i am dying to try it out.

Thanks - that's exactly like at my place. I took the picture at 2 a.m., right after Jupiter appeared above the trees :-)


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#472 semlin

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Posted 21 June 2021 - 06:54 PM

Thanks - that's exactly like at my place. I took the picture at 2 a.m., right after Jupiter appeared above the trees :-)

unfortunately it is only rising above the mountains that form the horizon, not above the tree.  i don't have a good southeast viewing spot on my property due to trees.


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#473 LukaszLu

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Posted 21 June 2021 - 07:53 PM

Ladies and gentlemen, here are final results of my test. 3 photos from 3 refractors. All of the same diameter but of very different reputation. The method of image processing was not the same - I set myself the goal of obtaining the similar effect as possible, but the route was slightly different each time, which must be taken into account when assessing the effects. All pictures taken with ZWO ASI 178MC, with the same SharpCap settings.

 

What do you think? Which refractor should be placed on the podium? Please click images to see the full-res versions.

 

Let's start with Carton T-620 60/910 mm:

 

THE-MOON-2021-06-20-C.jpg

 

 

the next is Towa 6305-N 60/900:

 

THE-MOON-2021-06-20-T.jpg

 

 

and the famous Polarex "broken lens" 114 60/900 mm, with seriously pinched flint - please take it under consideration:

 

THE-MOON-2021-06-20-P.jpg


Edited by LukaszLu, 21 June 2021 - 07:53 PM.

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#474 LukaszLu

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Posted 22 June 2021 - 06:52 AM

Raw material after stacking.

 

Carton T-620:

 

 

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  • carton.jpg
  • carton1.jpg

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#475 LukaszLu

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Posted 22 June 2021 - 06:53 AM

Towa 6305-N:

 

 

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  • towa.jpg
  • towa1.jpg

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