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  #1  
Old 07-12-2018, 04:22 PM
Wilso (Darren)
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MASUYAMA eyepiece

Hi all,

For those who are interested, looks like a new masuyama eyepiece is about to be released in the 1.25" format.
A small form 10mm eyepiece in the 85deg series.
Eye relief is a bit tight though at 6.5mm (similar to a 9mm nagler) but has a smooth barrel and weighing only 100gms.
To be released mid December.

Thanks for looking
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  #2  
Old 07-12-2018, 04:26 PM
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That'll go nicely with my Masu 20...
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  #3  
Old 07-12-2018, 04:34 PM
Wilso (Darren)
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I have the 16mm 85deg eyepiece one of my favourites.
Very sharp and contrasty suited to a longer focal ratio scope though.
Fit and finish on these are terrific.
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  #4  
Old 07-12-2018, 04:45 PM
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I find the Masu 20 superb in the f/5 FSQ-106.
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  #5  
Old 07-12-2018, 06:23 PM
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FlashDrive (Col)
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They are very nice eyepieces .... well worth having IMHO.

Col....
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  #6  
Old 08-12-2018, 12:41 PM
Hans Tucker (Hans)
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pffft..that's not an eyepiece...this is an eyepiece.

https://agenaastro.com/masuyama-3-in...iece-80mm.html
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  #7  
Old 08-12-2018, 05:20 PM
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FlashDrive (Col)
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Quote:
Originally Posted by Hans Tucker View Post
pffft..that's not an eyepiece...this is an eyepiece.

https://agenaastro.com/masuyama-3-in...iece-80mm.html

You then have to buy a 3" inch Diagonal .....things are getting quite expensive by then.


Nice Eyepiece tho'
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  #8  
Old 10-12-2018, 12:26 PM
SkyWatch (Dean)
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Quote:
Originally Posted by Hans Tucker View Post
pffft..that's not an eyepiece...this is an eyepiece.

https://agenaastro.com/masuyama-3-in...iece-80mm.html
That's not an eyepiece: it's a rocket booster!
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  #9  
Old 12-12-2018, 03:03 PM
ausastronomer (John Bambury)
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Quote:
Originally Posted by LewisM View Post
I find the Masu 20 superb in the f/5 FSQ-106.
Lewis,

That is a 52 Deg AFOV eyepiece is it not ?

Cheers
John B
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  #10  
Old 12-12-2018, 06:32 PM
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Yes John, 52 AFOV. Simply superb EP in refractors (didn't like it in the Mak that much).

I checked Astromart for some recently, and couldn't believe the current second hand price for them...$300 to $400 US - and they sell.
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  #11  
Old 12-12-2018, 07:36 PM
Wilso (Darren)
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Getting to the hard to get item status!!$
I was reading a thread on CN and a guy had 2 full sets of them.

It would be interesting to observe using the older Masuyama 52deg series to the newer Tak le's of today and how they compare considering the similar 5 element 3 group lenses with newer coatings.
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  #12  
Old 12-12-2018, 08:17 PM
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I've seen ghosting in LEs. Never in Masuyamas
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  #13  
Old 13-12-2018, 08:25 AM
ausastronomer (John Bambury)
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Quote:
Originally Posted by LewisM View Post
Yes John, 52 AFOV. Simply superb EP in refractors (didn't like it in the Mak that much).

I checked Astromart for some recently, and couldn't believe the current second hand price for them...$300 to $400 US - and they sell.
Hi Lewis,

I suspected as much. I have used the 52 deg AFOV ones down to F5 in Newtonians and they work very well. Due to the optical design limitations with 5 lens elements, it's not possible to get the 85 deg AFOV versions to perform well in fast telescopes. They will be excellent performers in slower scopes. They may or may not work well in SCT's which notwithstanding their F10 overall F-Ratio, generally have primary F-Ratios of F2 to F2.5, as some aberrations like field curvature are related to the F-ratio of the primary optic and not the F-ratio of the telescope.

Cheers
John B
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  #14  
Old 13-12-2018, 08:38 AM
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Merlin66 (Ken)
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It's the name that sells....
I should held onto the full set I had...would have improved my finances in retirement!!!
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  #15  
Old 13-12-2018, 08:59 AM
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Indeed it is the name Ken but they sure do perform too- so regularly copied there is a whole market of pseudo-Masuyamas. My Pseudo-Masu Parks Gold Series 25mm is my EP of choice on most nights.

I tried the Masu 20 in a Mewlon 300 once. Woeful! They assuredly like refractors (and Newts as John has said)
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