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Zerochromat is in home

Started by Psion , Sep 15 2014 03:06 PM

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161 replies to this topic

#101 Niklo

Viking 1

Posts: 904
Joined: 29 Mar 2013

Posted 26 November 2014 - 11:02 AM

It's a nice picture, but it doesn't show nowhere near what an 8" scope can do near the diffraction limit, so I won't call it amazing. This photo shows less than I can see visually in my 63mm Zeiss Telemator (the double crater near the alpine valley is just a spot, while I can distinctly see two craters in the Zeiss; I can't see Clavius JA in the photo, but it's well visible in the Zeiss, etc.).

Clear skies!
Thomas, Denmark

Hello Thomas,

If you just take a picture through the eyepiece then you get just the resoltion that is selected by the camera. For a high resolution photo you need a good camera and and take the videos in the focus. Here is a photo I took with the ASI 120MC and my Vixen 80L:

http://www.astrobin.com/full/126009/0

There go to full resolution. That comes close what it vivisible with the 80 mm refractor. OK the colours are nicer in the eyepiece but you see the problem. If I had taken a photo with 1024x768 I cannot get the resolution of the telescope.

Clear sky,

Roland

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#102 Astrojensen

James Webb Space Telescope

Posts: 18,347
Joined: 05 Oct 2008

Posted 26 November 2014 - 12:56 PM

Hi Roland

That is an amazingly good image for an 80mm. It's so incredibly close to the eyepiece view.

Clear skies!
Thomas, Denmark

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#103 Niklo

Viking 1

Posts: 904
Joined: 29 Mar 2013

Posted 26 November 2014 - 02:51 PM

Hi Thomas,

thank you very much. I was really happy that I was able to make that nice moon picture (moon mosaic of many pictures). (The Vixen 80L is really a very nice achromat refractor and I have been enjoying watching through it many times.

Back to the 8", you see now where the problem was. It wasn't the seeing. It was probably the resolution of the camera and focal length.

Clear sky,

Roland

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#104 Astrojensen

James Webb Space Telescope

Posts: 18,347
Joined: 05 Oct 2008

Posted 26 November 2014 - 02:57 PM

It was probably the resolution of the camera and focal length.

That was actually exactly what I was hinting at. As I said, it really didn't tell us much about the scope at all.

Clear skies!
Thomas, Denmark

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#105 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 22 January 2015 - 02:16 AM

The producer of the Zerochromat finished new versions - 250mm and 300mm diameter!

Zerochromat

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#106 Mark Harry

Cosmos

Posts: 8,798
Joined: 05 Sep 2005

Posted 30 January 2015 - 07:45 AM

I wonder if Peter will make a 6" version?
M.

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#107 ColinHawke

Lift Off

Posts: 21
Joined: 09 Aug 2010

Posted 30 January 2015 - 12:34 PM

Well a 6 inch is starting to get into traditional 'affordable' APO refractor territory so I would have thought the market would be limited for sizes 6 inches and below, although I may be wrong ...

I ordered the 8 inch f/12 one (at the old prices) and arrives in March; it nicely compliments my 5 inch f/6 Astro-Physics refractor but without much penalty in either weight, size/length, cost or importantly (for me) colour correction. I can't wait to start using it ..

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#108 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 30 January 2015 - 04:30 PM

I wonder if Peter will make a 6" version?
M.

I think not, the Zerochromat 6" is too small for reasonable price compared to traditional design. The price of the lenses, the mirrors and the focuser are similar as for 8" version.

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#109 Mark Harry

Cosmos

Posts: 8,798
Joined: 05 Sep 2005

Posted 30 January 2015 - 07:37 PM

I was thinking, a 6" F/12-15, using std glass achromats for the reducing elements past the primary focus. It could have the potential of reducing the overall cost of materials..... You see where this is going ????
AFFORDABLE- INCREASED AVAILABILITY- MORE PUBLICIZED FAVORABLE INFORMATION. (which isn't well received in present enviroment)
I'm not associated with this scope economically in any way, fyi.

M.

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#110 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 31 January 2015 - 06:28 AM

I saw a lot of similar optical designs with a doublet and a corrector, for example :

Objective :
Lens1 BK7
Lens2 F2

Corrector :
Lens 1 BAL 14 (Hoya)
Lens 2 KzFS N2 (Schott)
Lens 3 K10 (Schott)

I think, best chance (good price, optical quality and diameter) has a design singlet + corrector.

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#111 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 10 December 2015 - 06:04 PM

Today, I again take a telescope at Jupiter. Even if image stabilized and I saw solid detail at a magnification of 260x. I even tried magnification 480x, my head Baader Mark V still plenty of light into both eyepieces and the picture gave the chance in excellent seeing, Jupiter will be perfectly visible even with this magnification, there is an advantage compared to the average of 140 mm APO entirely clear.
Once the Red Spot occurred, its reddish color was very nice visible on the surface, a pretty color of Jupiter I had seen. After 3 hours the telescope temperature equilibrated, Jupiter looks almost the same as in any APO telescope on the bright sky in the morning.
Now it goes more or less just only about a seeing quality, no doubt about that. The user can think about how much better gets an image in the APO refractor 180-200 mm at a cost of about 3-4 times higher than Zerochromat.

Edited by Psion, 10 December 2015 - 06:17 PM.

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#112 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 17 March 2016 - 06:30 AM

Last night was seeing 7/10 and I made a few photos of the Moon.

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#113 39.1N84.5W

He asked for it

Posts: 5,020
Joined: 24 Oct 2006

Posted 17 March 2016 - 12:21 PM

Binoviewer question to Psion: Are you using the OCS to achieve focus? I am assuming (like other telescopes) there is not enough inward travel on the focuser.

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#114 Astrojensen

James Webb Space Telescope

Posts: 18,347
Joined: 05 Oct 2008

Posted 17 March 2016 - 12:40 PM

Last night was seeing 7/10 and I made a few photos of the Moon.

Now THAT'S what I'm talking about! Much better. Excellent images!

Clear skies!
Thomas, Denmark

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#115 Psion

Soyuz

topic starter

Posts: 3,616
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Posted 17 March 2016 - 12:57 PM

Binoviewer question to Psion: Are you using the OCS to achieve focus? I am assuming (like other telescopes) there is not enough inward travel on the focuser.

Zerochromat is F/12 and it has motorized focuser (MoonLite) and you can achieve a focus without a problem.

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#116 39.1N84.5W

He asked for it

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Joined: 24 Oct 2006

Posted 17 March 2016 - 01:06 PM

Are you using the OCS with the Binoviewer??

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#117 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 17 March 2016 - 01:13 PM

I have Zeiss Mark V and I use the Glasspath Corrector 1.25x and 2.6x - a great picture without an aberration.

Edited by Psion, 17 March 2016 - 01:15 PM.

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#118 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 17 March 2016 - 06:57 PM

Today, crater Eratosthenes, Zerochromat, B/W camera DMK21 and 2x Barlow.

Edited by Psion, 17 March 2016 - 07:15 PM.

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#119 39.1N84.5W

He asked for it

Posts: 5,020
Joined: 24 Oct 2006

Posted 18 March 2016 - 02:02 PM

I ordered.

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#120 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 18 March 2016 - 02:59 PM

Congratulation!!!

Vallis Alpes is not so good, seeing was worst. Zerochromat, B/W camera DMK21 and 2x Barlow

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#121 mattyk-usa

Viking 1

Posts: 963
Joined: 27 Jan 2015

Posted 19 March 2016 - 05:38 PM

Congratulation!!!

Vallis Alpes is not so good, seeing was worst. Zerochromat, B/W camera DMK21 and 2x Barlow

Good enough seeing to resolve the Alpine Valley rille! Really liking the pictures you're getting with this scope. Thanks for sharing.

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#122 Psion

Soyuz

topic starter

Posts: 3,616
Joined: 27 Apr 2005

Posted 19 March 2016 - 07:05 PM

The Moon and a last picture, Zerochromat, B/W camera DMK21 and 2x Barlow.

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#123 CHASLX200

ISS

Posts: 46,262
Joined: 29 Sep 2007

Posted 19 March 2016 - 07:15 PM

That has to be a good scope. That is what the moon looks like in my 8" f/8.5 Cave.

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#124 mattyk-usa

Viking 1

Posts: 963
Joined: 27 Jan 2015

Posted 19 March 2016 - 09:28 PM

Nice detail on Clavius in that last pic. One of my favorites.

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#125 Fhuyu

Ranger 4

Posts: 318
Joined: 06 Jul 2008

Posted 15 April 2016 - 09:56 AM

Thank you very much for all the data and pictures Psion!, really a pleasure to have so many first hand information of the Zerochromat :gotpopcorn: (here and in your country forum), although you are going to be "guilty" that there is a Super Zerochromat 10" preparing to come to my house in some months! :whee: , thank you very much again and do not hesitate comment more things that is always a joy to read you :happy: