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Equipment Discussions >> Binoviewers

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Eddgie
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Reged: 02/01/06

Will Mark V mount directly to Baader T2 Prism?
      #5760193 - 03/27/13 12:51 PM

Sorry if it has been asked and answered. Will the Quick connector on the Mark V unthread allowing the Mark V to thread right to the top of the Baader Prism?

Thanks!


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tomcody
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5761895 - 03/28/13 08:17 AM

Eddgie,
The only info Ihave seen on replacing the quick release bracket is by Dennis7 with his INOX 2" nosepiece. Do a search in the binoviewer forun for INOX. ( unfortunatly the critical picture for this thread no longer shows up) maybe Dennis can give you the thread size and you can proceed from there?
Rex


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Eddgie
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: tomcody]
      #5762676 - 03/28/13 04:31 PM

Ok, not really an option for me then. I was trying to shave off a bit more light path length and though that I might be able to mount the Mark V directly to the diagonal the way the Maxbrights did.

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tomcody
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5769613 - 03/31/13 08:08 PM

Eddgie,
I looked on the Alpine Astro site at the T-2 specification chart, the Quick release bracket for the Mark V is listed as having T thread on both parts.
So with the correct gender adapter ( if needed) it should work. you can set the angle where it tightens by using the baader spacer washers available on the same site.
Rex


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johnnyha
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: tomcody]
      #5769715 - 03/31/13 09:08 PM

I've inspected mine and I am not so sure the dovetail on the MkV is t-threaded on the bino side? Maybe. But there is no apparent way to remove the dovetail that I can see, and I'm not prepared to force it off, but it may be possible. I'm sure it is probably threaded on but it may be glued in?

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tomcody
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: johnnyha]
      #5770407 - 04/01/13 10:04 AM

link
Johnny,
You asked and Dennis0007dl answered that question in the above thread.
Rex


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Eddgie
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: johnnyha]
      #5770477 - 04/01/13 10:51 AM

Well, I re-read the thread and did not see an answer as to whether or not the Mk V would thread directly to the though it may be in there.

But I can't get the dovetail off. I am not really excited about the thought of using a vice grip to remove the dovetail, so maybe I will just leave it alone.

I doubt that I could get more than 7mm or 8mm of back focus out of it, so maybe just not worth the trouble.

Thanks to those that responded though. I apprecitate it.


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tomcody
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5770816 - 04/01/13 01:23 PM

Eddgie,
I just tried to unscrew my dovetail using a small strap wrench with a 4" handle and could not move it, (the strap just slipped) so it must be on there rather tightly. I gave up!
Rex


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Eddgie
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: tomcody]
      #5770842 - 04/01/13 01:38 PM

Exactly what I tried to do.. Used a rubber strap wrench.

It was just to narrow to get a bite on the rim, and the dovetail was too small to get enough grip.

I am not going to risk biting up the edge by using a Channel-lock pliers or something. As much as I would like to try to save as much back focus as possible, I am not going to risk tearing it up to do that.

Maybe if I can buy the part though. I might contact Aline Astro and see if I can just buy the Dovetail connector and that way, I could be covered.

But without knowing if the diagonal will tread directly on, then I don't know if there is any point.

Maybe AlpineAstro can check the tread to see if it is T2.

In fact, I preferred the way the Maxbright attached directly to the bino. I am not a huge fan of the quick connector. I get that it may be handy for some things, but I always feel like it might be an accident waiting to happen.

Edited by Eddgie (04/01/13 01:40 PM)


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tomcody
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5770939 - 04/01/13 02:27 PM

Eddgie,
I just looked in my eyepiece/Bino case and realized that I have a baader quick release coupling set. Bad news is that the dovetail part that I bought from Alpine astro does not look like the dovetail supplied with the Mark V, although it does have T thread on the body, the entire dovetail is thinner and there is NO internal threading for the GPC to screw to.
Rex


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johnnyha
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: tomcody]
      #5771226 - 04/01/13 04:58 PM

Well hopefully Denis will chime in, he was selling a 2" nosepiece replacement that required removing the stock dovetail, so it seems like he should be able to help here. But as I said, I would not be surprised if it is glued into prevent rotation.

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tomcody
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: johnnyha]
      #5771411 - 04/01/13 06:24 PM

Or knowing how German's assemble things its torqued to 100 lbs.
Rex


Edited by tomcody (04/01/13 06:25 PM)


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rfr66
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5782652 - 04/06/13 09:32 PM

Eddgie,
I spoke with Bob at Alpine Astro about removing the dove tail to gain aperture. He said that there would be no advantage in removing it. The full prism is already exposed to the light path and opening it up further would only expose the edge of the housing.


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Eddgie
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: rfr66]
      #5783429 - 04/07/13 09:51 AM

I think you miss the point.

My goal is not to explose more prism, but to shorthen the ltight path by eliminating the dovetail connector so that the binoviwer mounts directly to the diagonal the way the Maxbright does.

Besides that, I just don't like the dovetail connector.


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junomike
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5783768 - 04/07/13 01:05 PM

Hey Ed, Maybe this new Diagonal from Denk may work for ya, although It does work on a Dovetail system.

Mike


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Eddgie
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: junomike]
      #5783845 - 04/07/13 01:52 PM

Dude...Not sure how a 2" diagonal is going to shorten the light path.

The idea is to shorten the light path from 48mm to 38mm, not to go to 108mm.

Using a 2" diagonal on an SCT with binoviewers is usually a prescription for aperture reduction.


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junomike
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5784334 - 04/07/13 05:11 PM

Ed, That Diagonal DOES shorten the light path, but probably no more than the Dovetail system the Mark V has.
My guess is you're looking for this type of setup shown here with the TV BinoVues.

Mike


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Eddgie
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: junomike]
      #5784980 - 04/07/13 10:43 PM

As compared to other 2" diagonals it shortens the light path, but the light path is still likely to be 60mm to 70mm.

The prism I am using now is only 38mm light path, so to change to the 2" diagonal, even if it could mount directly to the Mk 5 (like the Televue in the link you sent) it would still be much longer than using the diagonal I already have.


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rfr66
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: Eddgie]
      #5793906 - 04/12/13 07:33 AM

Ed,
Here is something else that you can try to shorten the light path if you haven't tried it already. I removed the nosepiece from the T-2 prism diagonal and instead attached a Baader dovetail. I then removed the eyepiece holder from the back of my Meade 8" SCT. Using an adapter, I attached the dovetail from the diagonal directly to the back of the SCT. This effectively shortened the light path by almost the length of the nosepiece. I leave mine setup like this all the time. I have another dovetail on my FCC barlow so I can swap it in out quickly as well.


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Eddgie
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Re: Will Mark V mount directly to Baader T2 Prism? new [Re: rfr66]
      #5794007 - 04/12/13 09:22 AM

I have the Baader SCT to T2 adpater which is only 15mm.

I don't like it that much though. It works like the old SCT diagonals though, so there is a collar that has to be loosened to rotate the diagonal.

Does the dovetail holding screw offer enough grip to keep the binoviewer from rotating? I am not a fan of the dovetail connector on the binovierer itself, so this would be my only concern here.

I am to the point of blowing it off. I only use the EdgeHD 8" for general viewing, and I am currently at 7.7 inches of apeture, and I guess that is enough.

But again, I may check into the solution you are recommending.

Thanks.


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