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Takahashi TOE and Vixen HR

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24 replies to this topic

#1 JimP

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Posted 15 July 2018 - 08:51 PM

Are these basically the same eyepieces with slightly different focal lengths? Both are for High Resolution planetary/lunar/double star observations and both are in focal lengths of 4.0 mm or less Only.

Any thoughts?



#2 plyscope

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Posted 15 July 2018 - 09:11 PM

The TOE are 52 degree and more expensive than the HR which are 42 degree.


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#3 Tamiji Homma

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Posted 16 July 2018 - 12:55 PM

Hi Jim,

 

I've been comparing TOE 3.3, UW 3.3 and HR 3.4 on AP Traveler 105mm f/6 and APM 130 f/9.2.

So far, I am leaning toward TOE 3.3.

 

Among them, TOE 3.3 shows the best contrasty view on Jupiter and the Moon.

I wish we have more stable sky.

 

large.jpg

 

Tammy


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#4 skysurvey

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Posted 16 July 2018 - 04:49 PM

Hi Tammy

 

What do you think about Takahashi LE 3.6mm?

 

Right now I´m looking at the Moon with LE 3.6mm + Taka FC76 and the combination is formidable; anyway I'm thinking about TOE 4mm, but I would like to know how the LE 3.6mm compares to TOE 3.3 and Vixen 3.4 (I know they have different focal lengths, but I think they are close enough to get conclusions).

 

Best regards

Jose


Edited by skysurvey, 16 July 2018 - 04:50 PM.


#5 Tamiji Homma

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Posted 16 July 2018 - 05:36 PM

Hi Tammy

 

What do you think about Takahashi LE 3.6mm?

 

Right now I´m looking at the Moon with LE 3.6mm + Taka FC76 and the combination is formidable; anyway I'm thinking about TOE 4mm, but I would like to know how the LE 3.6mm compares to TOE 3.3 and Vixen 3.4 (I know they have different focal lengths, but I think they are close enough to get conclusions).

 

Best regards

Jose

 

Hi Jose,

 

Difference between 3.3 and 3.6 is large enough (near 10%) to do fair comparison besides having good seeing to see them clearly is unfortunately rare.

If your seeing supports high magnification, I'll skip 3.3, go HR 2.4 or TOE 2.5 :)

 

PS: I haven't looked through TOE 2.5 yet but I really like HR 24, even better than Pentax XO 2.58.

 

Tammy


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#6 skysurvey

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Posted 17 July 2018 - 03:28 PM

Hi Tammy

 

Thank you for your answer

 

What do you think about scatter light comparing LE 3.6mm against TOE 3.3mm and Vixen HR 3.4mm?

 

Regards

Jose


Edited by skysurvey, 17 July 2018 - 03:29 PM.


#7 Tamiji Homma

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Posted 18 July 2018 - 11:38 AM

Hi Tammy

 

Thank you for your answer

 

What do you think about scatter light comparing LE 3.6mm against TOE 3.3mm and Vixen HR 3.4mm?

 

Regards

Jose

 

From field lens reflection check, Vixen HR 3.4 (and 2.4) shows MUCH better result than the rest.

Maybe Vixen HR has better scatter/reflection suppression control.

 

Seeing isn't good enough to do critical examination under the sky. It takes some time to know.  So far, I like TOE 3.3 best.

The preference may change when I spend more quality time with them, though.

 

Tammy



#8 jeffmac

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Posted 18 July 2018 - 04:08 PM

Tammy, be sure and let us know after you have had a good chance to evaluate the two under better seeing conditions. Thanks in advance.     smile.gif



#9 chuckles

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Posted 06 September 2018 - 04:40 PM

Any one have further thoughts on this topic? Any updates?



#10 Starlease

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Posted 07 September 2018 - 01:38 AM

I have the Tak Toe 4mm and it is so superior to any other 4mm in my 10 inch dob.

Directly compared it with Delite 4mm and Delos 4.5mm and Pentax xw 3.5mm on Jupiter last year and this time around. There is no comparison except the Delite showed the red colors on Jupiter better than any other. The super fine details like the white ovals in that band next to the great red spot are more easily seen. Also the 2nd red spot and the dark triangle trailing it are also easier to see. The 3.3 and 2.5mms just would not get much use as rarely go that high of powers. I have a 5 inch apo that could use those two but a 5 inch just does not have the resolution to justify the expense.


Edited by Starlease, 07 September 2018 - 01:44 AM.

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#11 plyscope

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Posted 07 September 2018 - 06:08 AM

I have the TOE 4mm and really like it. It is better than the Nagler 3-6mm zoom at the 4mm setting. In Australia the TOE eyepieces are easily available through the national Takahashi dealer. The Vixen HR eyepieces are only available through international dealers. I would be keen to try the HR 2.4 or 3.4mm.



#12 25585

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Posted 08 September 2018 - 03:24 PM

I have the Tak Toe 4mm and it is so superior to any other 4mm in my 10 inch dob.

Directly compared it with Delite 4mm and Delos 4.5mm and Pentax xw 3.5mm on Jupiter last year and this time around. There is no comparison except the Delite showed the red colors on Jupiter better than any other. The super fine details like the white ovals in that band next to the great red spot are more easily seen. Also the 2nd red spot and the dark triangle trailing it are also easier to see. The 3.3 and 2.5mms just would not get much use as rarely go that high of powers. I have a 5 inch apo that could use those two but a 5 inch just does not have the resolution to justify the expense.

Where does the Delite fall behind the TOE?


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#13 Starlease

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Posted 08 September 2018 - 09:59 PM

Delite Delos Pentax xw are all about the same on planet's.

The toe is probably as good as the best ever like Zeiss

TMB monos Clave which are all a major step above TV and xw line.


Edited by Starlease, 08 September 2018 - 10:00 PM.


#14 lylver

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Posted 09 September 2018 - 02:27 AM

TOE is a dedicated eyepiece for the well corrected TOA 130, the combination goes up to 98% strehl, all range all field. (source Takahashi)

it is designed to be used at f/7.7 to reach best specs (Takahashi), see the combinated results with the TOA :

TOE3.3_StrehlRatio.jpg takahashi-toe-25-mm-eyepiece.jpg

 

Vixen HR is more helpful for Newton R200SS, it has a coma correction included. Its design has optimized baffling and stray light control. (source Vixen on astrogarten). Works well with f/4 optics.

astrogarten-vixen-hr-transmission.jpg

 

 

NO-HR.png HR-vixen.png

 

You should always specify on which scope you are conducting tests and make reports.


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#15 Starlease

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Posted 09 September 2018 - 04:24 PM

I do almost all eyepiece testing with a 10 inch f/5.

And the Tak TOE really performs great.


Edited by Starlease, 09 September 2018 - 04:25 PM.


#16 chuckles

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Posted 09 September 2018 - 10:47 PM

Thanks for the additional info. I have an f/7 refractor, so I assume both will perform well. Maybe the extra afov should be the deciding factor? Anyone have more details on a direct comparison?

#17 agmoonsolns

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Posted 22 December 2018 - 05:44 AM

Hi Tammy,

 

That's a gorgeous eyepiece turret in your photo, can you tell me what kind it is? The photo is terrific, it shows all of the eyepieces together for comparison.

 

Thanks!

 

Kenzie

 

 

 

large.jpg

 

Tammy


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#18 StarDust1

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Posted 22 December 2018 - 06:55 AM

That's Takahashi 4-Turret:

https://www.astronom...ece-holder.html


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#19 25585

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Posted 22 December 2018 - 09:08 AM

That's Takahashi 4-Turret:

https://www.astronom...ece-holder.html

Thing of beauty.


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#20 Tamiji Homma

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Posted 22 December 2018 - 11:40 AM

Here is old (5 eyepieces) and new (4 eyepieces) Takahashi eyepiece turret side-by-side.

 

large.jpg

 

Tammy


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#21 agmoonsolns

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Posted 22 December 2018 - 04:22 PM

Wow! Which one of the two do you prefer? Do they have mirror prism or diagonals? What a perfect way to compare eyepieces!



#22 range88

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Posted 22 December 2018 - 10:45 PM

I sold vixen hr2.4 for toe 2.5.

#23 Tamiji Homma

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Posted 27 December 2018 - 12:19 PM

Wow! Which one of the two do you prefer? Do they have mirror prism or diagonals? What a perfect way to compare eyepieces!

 

Both turrets have star prism diagonal.  I like 5 eyepiece turret better except bulkiness.

They get used less frequently due to zoom eyepieces.

 

It is indeed useful tool to compare eyepieces.   You can switch eyepiece between blinks.

 

Tammy


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#24 jeffmac

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Posted 28 December 2018 - 08:47 PM

Both turrets have star prism diagonal.  I like 5 eyepiece turret better except bulkiness.

They get used less frequently due to zoom eyepieces.

 

It is indeed useful tool to compare eyepieces.   You can switch eyepiece between blinks.

 

Tammy

Yes and in the 5 piece turret, none of the eyepieces are hanging upside down. That would bother me a little.   smile.gif



#25 skullpin

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Posted 29 December 2018 - 03:29 AM

Yes and in the 5 piece turret, none of the eyepieces are hanging upside down. That would bother me a little.   smile.gif

Undercuts to the rescue! Doh.. Takahashi compression locks do not play well with undercuts.

 

Actually, I despise undercuts. I have the compact turret, and eyepieces are locked safely in place. I rarely change the eyepieces out.

 

Keith


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