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A New Masuyama is Coming

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22 replies to this topic

#1 Kent10

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Posted 06 December 2018 - 07:06 PM

I don't think I have seen mention of this one yet.  Many have been wondering what would be next in the new Masuyama line and I just noticed this 10mm at 85 degrees.  https://agenaastro.c...0mm-mop-10.html

 

It looks like they are going wide angle instead of the earlier 52 degrees.  Hard to believe they can get 85 clean degrees out of 5 elements.

 

I have many of the older Masuyamas and really like them but I don't have any of the new ones to compare.  Would be fun.


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#2 Kent10

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Posted 06 December 2018 - 07:07 PM

6.5mm eye relief.



#3 range88

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Posted 06 December 2018 - 07:33 PM

I hope it can at least live up to its specification.

#4 Kent10

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Posted 06 December 2018 - 07:36 PM

It would be interesting to know if the design of lenses is the same as the older 10mm but with a larger field stop or did they do something different with the 5 lenses to achieve the larger field of view.



#5 Lt 26

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Posted 06 December 2018 - 07:51 PM

Why would you want 85° with 6.5mm of eye relief?

Dereck
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#6 Migwan

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Posted 06 December 2018 - 08:02 PM

3.53.oz. 



#7 Astrojensen

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Posted 07 December 2018 - 11:36 AM

Pretty unusual in today's market I'd say. It had better be an extremely sharp eyepiece for one to put up with 6.5mm's of eye relief, when you can get 9mm to 11mm 82° - 100° eyepieces that have FAR superior eye relief and are already very sharp and crisp eyepieces for basically the same money. 

 

The small form factor could be a deciding factor in some circumstances, I guess, especially if one uses a long focal ratio telescope, where good edge performance is guaranteed.

 

 

Clear skies!
Thomas, Denmark


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#8 denis0007dl

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Posted 07 December 2018 - 01:42 PM

6.5mm eye releaf at 85 deg FOV?

Oh my.....

Thats absolutely unusable!



#9 Astrojensen

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Posted 07 December 2018 - 04:46 PM

6.5mm eye releaf at 85 deg FOV?

Oh my.....

Thats absolutely unusable!

Well, I wouldn't say so, until I've used one. I have a 10mm GSO Superview with 70° AFOV and the ER is probably in the same range and the 70° is eminently usable, so I wouldn't rule out a 10mm/85° eyepiece before I've tried it. 

 

But it does sound a bit tight. 

 

 

Clear skies!
Thomas, Denmark


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#10 Simon B

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Posted 07 December 2018 - 10:03 PM

daaaw, just look at that little mushroom of an eyepiece... so kawaii : p



#11 russell23

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Posted 08 December 2018 - 11:59 AM

Why would you want 85° with 6.5mm of eye relief?

Dereck

That is the question.  I wish they would bring back the 52 deg line or add more elements so they can go with longer eye relief.   I tried a 16mm and it really was a mess at the edges in my f/7.5 APO.  There is no question the central field has excellent transmission and sharpness, but I'm just not sure why we would ask a 5 element design to give us 85 deg AFOV.


Edited by russell23, 08 December 2018 - 11:59 AM.

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#12 Astrojensen

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Posted 08 December 2018 - 12:26 PM

 I'm just not sure why we would ask a 5 element design to give us 85 deg AFOV.

Neither am I, to be honest. It's really pushing it too far, IMO, especially when there are extremely good and even more affordable options out there with much better eye relief, better edge correction and as large field - or larger. The only thing it seems to really have going for it, when I look at it as objectively as I can, is the small form factor and light weight. 

 

Until someone reviews it and tell me it's the best thing since forever and clearly bests almost any other eyepiece out there, I'm scratching my head a little. scratchhead2.gif

 

 

Clear skies!
Thomas, Denmark


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#13 BillP

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Posted 08 December 2018 - 12:44 PM

daaaw, just look at that little mushroom of an eyepiece... so kawaii : p

 

Very cool.  This eyepiece with the 16T5 would be a cute little pair!



#14 Astrojensen

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Posted 08 December 2018 - 01:11 PM

Very cool.  This eyepiece with the 16T5 would be a cute little pair!

It IS cute, but we don't buy eyepieces because they're cute, do we? 

 

Do we? 

 

 

 

Clear skies!
Thomas, Denmark



#15 Lt 26

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Posted 08 December 2018 - 03:02 PM

No most are ugly. Which is why we only take them out when it is dark.

Dereck
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#16 Starman1

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Posted 10 December 2018 - 12:21 AM

I don't think I have seen mention of this one yet.  Many have been wondering what would be next in the new Masuyama line and I just noticed this 10mm at 85 degrees.  https://agenaastro.c...0mm-mop-10.html

 

It looks like they are going wide angle instead of the earlier 52 degrees.  Hard to believe they can get 85 clean degrees out of 5 elements.

 

I have many of the older Masuyamas and really like them but I don't have any of the new ones to compare.  Would be fun.

They already have a 32mm, 26mm and 16mm in 85°, so a 10mm is a logical next step.

But 6.5mm of eye relief?  Really?


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#17 BillP

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Posted 11 December 2018 - 11:53 AM

It IS cute, but we don't buy eyepieces because they're cute, do we? 

 

Do we?

 

I'm not tellin' lol.gif


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#18 Astrojensen

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Posted 11 December 2018 - 03:24 PM

grin.gif lol.gif

 

 

Clear skies!
Thomas, Denmark



#19 Jim Curry

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Posted 12 December 2018 - 08:35 PM

Gotta take into account its figure, too.grin.gif



#20 Tyson M

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Posted 12 December 2018 - 10:44 PM

Very cool eyepiece, for non glasses users. 



#21 Sarkikos

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Posted 15 December 2018 - 09:52 AM

A new Masuyama.

 

1.25" eyepiece.

 

10mm focal length.

 

85 degrees AFOV.

 

6.5mm eye relief.

 

Poor outer-field correction.

 

My first question is:  Why?   shrug.gif

 

 

My second question is:  Why not get a Nagler instead?

 

1.25" eyepiece.

 

9mm focal length.

 

82 degrees AFOV.

 

12mm eye relief.

 

Excellent outer-field correction.

 

Mike


Edited by Sarkikos, 15 December 2018 - 10:00 AM.

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#22 Sarkikos

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Posted 15 December 2018 - 10:02 AM

6.5mm eye releaf at 85 deg FOV?

Oh my.....

Thats absolutely unusable!

 

I might be able to use it, but why would I use it?

 

:grin:

Mike


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#23 skysurvey

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Posted Yesterday, 07:10 AM

Hello

 

I think the appropriate question is: why doesn't Masuyama make the 52º series again?, PLEASEEE  !!!

 

Just my two cents

Regards

Jose


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