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Equipment Discussions >> Refractors

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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: PeterR280]
      #6065150 - 09/05/13 08:24 PM

Scott, I will let you know if the camera has issues. It should not have issues however because with the magnus focuser I could focus on stars when the tube was about 2.5" out of the focuser, the GSO goes out at least 5" so there should be plenty of room.

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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: PeterR280]
      #6065360 - 09/05/13 10:53 PM

i'm using a 1" extension for my Nikon. it gives plenty of room without diagonal.

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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: Scottxray]
      #6067268 - 09/07/13 06:00 AM

Scott, The barska will bring stars to focus at the 6 cm mark on the focuser scale when in use with the 80mm magnus, I confirmed this tonight with my t2i.

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Scottxray
newbie


Reged: 08/06/10

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: calypsob]
      #6077775 - 09/12/13 09:29 PM

Thanks. After a careful cleaning of the Barska focuser it is working well for astrophotos. It is holding focus perfectly, even at straight up views. Although it feels a little rough it is perfectly functional, especially since photos are set with a Bahtinov mask. I have not had any focus changes on any of many sets I've taken, even over hours.

What I DO need is a good field flattener, slight reducer.
My outer edge stars are showing nice little oblong donuts at all four corners, (just as they should without correction). I tried a meade F6.3 but it overcorrects the flat field and I get ovals that are at 90 degrees to the donuts angles ( when no flattener is used) at the field edges. It also vignettes too much.

Anyone know of a great flattener for the Barska?


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: Cheapest 'ED APO' yet? (Barska Magnus) [Re: Scottxray]
      #6079057 - 09/13/13 04:39 PM

Maybe I missed it, but did anyone try the 65mm Version of this scope?

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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: jag767]
      #6080008 - 09/14/13 09:12 AM

I just got the first look at Jupiter this morning with the 80mm Barska. Highest magnification was with a 4.7mm ES. I have to say seeing is amazing that early in the morning. The atmosphere is very calm. You could see the banding quite sharply. The telescope shows no color fringing on Jupiter.

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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: Scottxray]
      #6129248 - 10/10/13 02:35 PM

Quote:

Thanks. After a careful cleaning of the Barska focuser it is working well for astrophotos. It is holding focus perfectly, even at straight up views. Although it feels a little rough it is perfectly functional, especially since photos are set with a Bahtinov mask. I have not had any focus changes on any of many sets I've taken, even over hours.

What I DO need is a good field flattener, slight reducer.
My outer edge stars are showing nice little oblong donuts at all four corners, (just as they should without correction). I tried a meade F6.3 but it overcorrects the flat field and I get ovals that are at 90 degrees to the donuts angles ( when no flattener is used) at the field edges. It also vignettes too much.

Anyone know of a great flattener for the Barska?




Hey sorry I missed this, the Hotech SCA field flattener works great for the magnus, you just need to get one that is designed for an F7, the Hotech fits the bill. Also, how did you get the barska focuser to work so well? I could back the image into focus but I was never able to get it to pull the weight of the camera back into the tube. It really is a nice focuser build wise, internally baffled and very tight tolerances which prevent any shift from locking it up whatsoever, but I hated that I could not get it to focus smoothly. I get a little bit of shift with the new GSO focuser but it is silky smooth.

Edited by calypsob (10/10/13 02:41 PM)


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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: jag767]
      #6129250 - 10/10/13 02:38 PM

Quote:

Maybe I missed it, but did anyone try the 65mm Version of this scope?




No but I have been curious about it. The AT65 ed would be its biggest competitor, and for a $150 field flattener I would probably roll with the At65 instead


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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: calypsob]
      #6129260 - 10/10/13 02:42 PM

Oh and here is a short video of the GSO focuser on the magnus http://www.youtube.com/watch?v=EeWZcUNtmb0

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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: calypsob]
      #6129265 - 10/10/13 02:47 PM

As for chromatic abberations, My astrophotography skills are not that great, and my mount does not guide perfect, but the scope delivers fringe free images
veil 2 by LMNO Sunset Deluxe, on Flickr


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: calypsob]
      #6129278 - 10/10/13 02:52 PM

Quote:

Quote:

Maybe I missed it, but did anyone try the 65mm Version of this scope?




No but I have been curious about it. The AT65 ed would be its biggest competitor, and for a $150 field flattener I would probably roll with the At65 instead




best buy has it for 349, and I have a friend who works there can probably get at least $50 off of that. So for 299 I'm thinking super finder/travel scope?


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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: calypsob]
      #6129301 - 10/10/13 03:07 PM

Great photo Calypsob

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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: jag767]
      #6130019 - 10/10/13 10:13 PM

Quote:

Quote:

Quote:

Maybe I missed it, but did anyone try the 65mm Version of this scope?




No but I have been curious about it. The AT65 ed would be its biggest competitor, and for a $150 field flattener I would probably roll with the At65 instead




best buy has it for 349, and I have a friend who works there can probably get at least $50 off of that. So for 299 I'm thinking super finder/travel scope?




Yea it would be crazy to pass up.


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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: PeterR280]
      #6130021 - 10/10/13 10:14 PM

Quote:

Great photo Calypsob




Thanks man, more to come if skies permit.


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: calypsob]
      #6130592 - 10/11/13 09:07 AM

Quote:

Quote:

Quote:

Quote:

Maybe I missed it, but did anyone try the 65mm Version of this scope?




No but I have been curious about it. The AT65 ed would be its biggest competitor, and for a $150 field flattener I would probably roll with the At65 instead




best buy has it for 349, and I have a friend who works there can probably get at least $50 off of that. So for 299 I'm thinking super finder/travel scope?




Yea it would be crazy to pass up.




You guys are a bad influence! Got the 65mm for 296 no tax free shipping with 2 eps, diagonal, and case.


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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: jag767]
      #6131154 - 10/11/13 01:32 PM

I got my Barska 80mm for $349. earlier this year. There was a few weeks where Amazon dropped the price, then they increased it.

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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: Cheapest 'ED APO' yet? (Barska Magnus) new [Re: PeterR280]
      #6132542 - 10/12/13 07:18 AM

Alright 65mm is on its way. Only problem I potentially see is if I decide it's a keeper but hate the focuser what I can do in terms of replacing it. I have a feeling my only option will be a custom flange from moonlite, and oh yea, doubling my cost by having to buy a moonlite

I didnt realize how butt ugly the finish on these are until it already shipped, so if the lens fit what I want for a super finder and travel scope, its getting fully dismantled and redone. Perhaps a pearl cream or metallic blue.


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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) [Re: jag767]
      #6132627 - 10/12/13 09:09 AM

I put the GSO focuser on my 80mm.

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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: Cheapest 'ED APO' yet? (Barska Magnus) [Re: PeterR280]
      #6132636 - 10/12/13 09:15 AM

Quote:

I put the GSO focuser on my 80mm.




I had hopes to do the same, but I'm thinking there's a good chance there's no flange small enough....


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calypsob
sage
*****

Reged: 04/20/13

Re: Cheapest 'ED APO' yet? (Barska Magnus) [Re: jag767]
      #6143125 - 10/17/13 02:57 PM

GSO makes an 86mm flange, you will have to measure it when it arrives. Moonlight will make you a custom adapter, as would most any machine shop. It is just going to be a threaded step up adapter, one side threade, the otherside would be a male flange fitting for the female flange coupling on the GSO, or whatever you decide to go with.

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