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Tak prism and Baader Zeiss prism diagonals

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#1 mike bacanin

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Posted 03 July 2020 - 03:42 PM

I have the Tak 1.25" prism diagonal. Would the Baader Zeiss 34mm T2 prism diagonal offer an improvement over the tak? used in  102 F8.8 apo.

planetary and lunar observation.

 

Mike



#2 RAKing

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Posted 03 July 2020 - 03:53 PM

Mike,

 

I have both and optically I don't think there is much difference.

 

The Baader T-2 system is more solidly constructed overall and it holds my eyepieces much better.  But I use my scopes on a GEM and the scope, diagonal, and eyepieces all rotate a little as it slews to different places, so a solid grip is important for me - maybe no one else cares. 

 

Also, I use a Clicklock on my Zeiss prism and it's much easier to tighten and release than that tiny Tak collet. Ugh! My hand hurts to think about it. tongue2.gif 

 

Hope all is well!

 

Ron


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#3 Astrojensen

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Posted 03 July 2020 - 03:57 PM

I've not used the Tak prism diagonal, but the Baader/Zeiss T2 and the Baader/Zeiss 2" diagonals are the two best diagonals I've ever used. They are as close to invisible as possible, in my experience.

 

If there's a better diagonal, I'd like to try it.

 

 

Clear skies!
Thomas, Denmark


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#4 mike bacanin

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Posted 03 July 2020 - 04:01 PM

Hi Ron,

 

I'm well and hope you are too. Are you using the 1.25" clicklock on the eyepiece side of the Baader prism? I see Baader also does a T2 eyepiece holder that allows a few mm of focus adjustment but has compression ring instead of clicklock.

 

thank you Thomas for your comments.

 

Mike


Edited by mike bacanin, 03 July 2020 - 04:02 PM.


#5 cdr dcm

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Posted 03 July 2020 - 04:06 PM

I own and use both of the diagonals of concern to the o.p. I also have the 2 inch Baader Zeiss. They all give very good images. The build quality of the Baaders is really solid, feels more substantial than the Tak but I don't think the Tak gives up much in actual performance, light transmission. Personally I don't think the cost of the upgrade is worth it in terms of what you will see at the eyepiece.


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#6 areyoukiddingme

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Posted 03 July 2020 - 04:09 PM

I have only the Tak, but it is worth noting that the device for clamping eyepieces can be rather poor indeed with eyepieces that have curved barrels, like the Explore Scientifics.

 

If you have smooth barreled eyepieces, or Pentax XWs (those undercuts work), then the Tak works great. 


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#7 noisejammer

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Posted 03 July 2020 - 04:16 PM

Mike, I have both and my perception is that the Baader is brighter, probably thanks to the silver coating on the 45 deg surface.. Optically, I don't think there's anything in it

 

I use them at f/7 and f/7.3- typically to 40x / inch - and have not noticed any spherochromatism from either.


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#8 ddegroot

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Posted 03 July 2020 - 04:31 PM

I upgraded from the Tak to the Baader. In my view the improvement in brightness and sharpness is modest - the improvement in convenience (with that click lock) is more meaningful.
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#9 mike bacanin

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Posted 03 July 2020 - 04:33 PM

please excuse me, I am not familiar with the baader prisms.

I see they offer 2 T2 prism diagonals.

1) 90 degree to zeiss spec with multi coatings, erect but reversed left to right image

2)90 degree amici to zeiss spec with phantom coatings, erect and right way left to right image.

 

which of these has a silvered 45 degree face?

 

Mike


Edited by mike bacanin, 03 July 2020 - 05:15 PM.

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#10 coopman

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Posted 03 July 2020 - 05:07 PM

The Tak prism does not do well with the security grooves that many eps have on their barrels. 


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#11 junomike

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Posted 03 July 2020 - 05:50 PM

Had both, still have the Baader.

Found the Tak to be cheaply made.

Baader is modular offering various attachments.

Easy decision for me.


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#12 StarDust1

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Posted 03 July 2020 - 06:56 PM

I have used both the Tak 1.25" prism diagonal and the Baader Zeiss 34mm T2 prism diagonal. The Tak is a better value depending where you are located.The Baader is solid build. The build quality of the Tak was never an issue to me, if one don't use heavy eyepieces then the Tak is fine. The click clock of the Baader is nice and rock solid. If you want to use Ethos like (with 1.25" barrel) then the Baader is the way to go.



#13 Don Taylor

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Posted 03 July 2020 - 08:39 PM

please excuse me, I am not familiar with the baader prisms.

I see they offer 2 T2 prism diagonals.

1) 90 degree to zeiss spec with multi coatings, erect but reversed left to right image

2)90 degree amici to zeiss spec with phantom coatings, erect and right way left to right image.

 

which of these has a silvered 45 degree face?

 

Mike

Mike:    Kunama linked this document from Baader in another thread https://www.baader-p...s_t_2_and_2.pdf

 

Looks like Baader applies the BBHS dielectric protected silver to the T2 Zeiss spec prism diagonal (#2456095), the 2" Zeiss spec prism diagonal (#2456117), T2 Roof Prism diagonal (#2456130), and the 2" Amici Prism diagonal (#2456120).

 

I hope this helps. 


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#14 rkelley8493

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Posted 03 July 2020 - 10:26 PM

I think it's part no. T2-01B for the T2 Zeiss Prism. The beauty & the curse is that there is a multitude of connectors & adapters that you can use with the prism, but each adapter adds to the overall cost.


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#15 Kunama

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Posted 03 July 2020 - 10:27 PM

I have the Tak 1.25" prism diagonal. Would the Baader Zeiss 34mm T2 prism diagonal offer an improvement over the tak? used in  102 F8.8 apo.

planetary and lunar observation.

 

Mike

I assume your scope is the Vixen FL102?  

As others have said, the difference in view is very small, but in build quality and clamp design the the Baader is much better.

Having said that,  I sold my Baader Zeiss Spec prism and now have the Tak prism for my little FOA60Q and the Baader Maxbright T2 for my Zeiss binoviewer.

I also have the 2" BBHS Mirror from Baader for monoviewing with the 6" scope.


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#16 Kunama

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Posted 03 July 2020 - 10:32 PM

I think it's part no. T2-01B for the T2 Zeiss Prism. The beauty & the curse is that there is a multitude of connectors & adapters that you can use with the prism, but each adapter adds to the overall cost.

The T2-01B is also known by the Baader number #2456095.  This is the bare Zeiss spec prism without nosepiece or clamp.  

The very early ones had a prism made by Zeiss, the current ones are made to the same Zeiss specifications but the actual maker is ????


Edited by Kunama, 03 July 2020 - 10:33 PM.

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#17 rkelley8493

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Posted 03 July 2020 - 10:47 PM

The T2-01B is also known by the Baader number #2456095.  This is the bare Zeiss spec prism without nosepiece or clamp.  

The very early ones had a prism made by Zeiss, the current ones are made to the same Zeiss specifications but the actual maker is ????

Gotcha! I really dig this little prism on the moon & planets.. It has given me some of the clearest, sharpest, contrast-iest views I've ever seen gottahurt.gif

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Edited by rkelley8493, 03 July 2020 - 10:56 PM.

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#18 mike bacanin

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Posted 04 July 2020 - 04:04 AM

Mike:    Kunama linked this document from Baader in another thread https://www.baader-p...s_t_2_and_2.pdf

 

Looks like Baader applies the BBHS dielectric protected silver to the T2 Zeiss spec prism diagonal (#2456095), the 2" Zeiss spec prism diagonal (#2456117), T2 Roof Prism diagonal (#2456130), and the 2" Amici Prism diagonal (#2456120).

 

I hope this helps. 

Thanks Don, that clears things up.

 

Mike



#19 j.gardavsky

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Posted 04 July 2020 - 07:46 AM

I have the Tak prism still boxed.

 

Rkelley, where is the Moon, I must try the little Tak,

JG


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#20 mike bacanin

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Posted 04 July 2020 - 08:28 AM

Just ordered the Baader zeiss 34mm prism with 1.25" clicklock on the eyepiece side.

thanks for all the input.

 

Mike


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#21 j.gardavsky

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Posted 04 July 2020 - 12:50 PM

Just ordered the Baader zeiss 34mm prism with 1.25" clicklock on the eyepiece side.

thanks for all the input.

 

Mike

Than, you still need the Zeiss Barlow.

 

Glass to glass, Zeiss to Zeiss,

JG


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#22 mikeDnight

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Posted 04 July 2020 - 01:10 PM

  I've been using the Tak prism diagonal for the last five years with my FC100DC and its been a great performer. When I bought a FC100DZ a couple of months ago, I thought I'd treat it to a Baader Zeiss BBHS prism diagonal. The morning it arrived I decided to aim the DZ at a distant random stone wall a couple of miles away. I was looking through double glazing but I just wanted to see if I could detect any subtle difference between the two diagonals. The Baader Zeiss showed a razor sharp outline to the top of the wall which had multiple vertical stones along its top edge. Even the lichen growing on the stones was easily seen. When I swapped to the Tak prism, the vertical stones which were so sharply defined in the BBHS prism, lost their sharp definition in the Tak prism, and a soft colour blur outlined the top of the wall was visible which wasn't seen in the Baader Zeiss.

  So far I've only used the Baader Zeiss on the Moon, Venus and a few double stars, but it wouldn't surprise me if the Baader Zeiss prism revealed a marked level of contrast and definition over the Tak prism when it comes to Jupiter and Mars.


Edited by mikeDnight, 04 July 2020 - 01:14 PM.

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#23 rkelley8493

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Posted 04 July 2020 - 01:20 PM

...

So far I've only used the Baader Zeiss on the Moon, Venus and a few double stars, but it wouldn't surprise me if the Baader Zeiss prism revealed a marked level of contrast and definition over the Tak prism when it comes to Jupiter and Mars.

I got some excellent views using the T2-ZP a couple of nights ago on Jupiter. I didn't compare the views with a mirror because they were too good to look away from. Ganymede was transiting in front of Jupiter and casted its large shadow on the face of the planet, but that wasn't the best part. The best part was the Ganymede stood out on its own in front of the huge, bright, colorful planet. It was an Ash Gray color with lighter & darker regions. I had never seen anything like it before, it was so beautiful. 


Edited by rkelley8493, 04 July 2020 - 02:33 PM.

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#24 godra

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Posted 04 July 2020 - 02:17 PM

I have been using Tak prism with my FC100DC for couple of months. I haven't had a chance to compare the views with some other diagonals(mirror or prism)but I am conviced that this prism introduce me some color on bright stars and planets. Unfortunatly, I don't have Tak adapter(extender) for straight trough viewing to confirm this. Also I somewhere read that for this fast D/F ratio(7.4)mirror diagonal is better option.
What is yours suggestion...Is it better option for me to sell Tak prism and buy T2 BBHS mirror diagonal? This diagonal also have option for upgrade with baader helical focusing eyepiece holder,which could be nice for me( I don't have mef-3)

Edited by godra, 04 July 2020 - 02:32 PM.


#25 lookoutmtn17

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Posted 04 July 2020 - 02:53 PM

I am in the same predicament as the OP, as I have a 1.25" Tak prism, and I too have been looking at the Baader prism diagonals. The 2" Baader Astro Amici-Prism with BBHS coatings looks interesting, does anyone have any experience or comments regarding this diagonal? Thanks, Tim




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