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new series of cheap 70° EP on amazon... Any comments?

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#1 brebisson

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Posted 12 September 2019 - 04:18 AM

Hello,

 

A new series of Chinese EP has popped out on my radar. At around 35€ a pop, they seem pretty ok.

They seem to come in 5 focal length: 8, 12, 16, 19 and 27mm.

 

8, 19 and 27 as a set: https://www.amazon.f...product&sr=1-54

12: https://www.amazon.f...product&sr=1-70

16: https://www.amazon.f...product&sr=1-34

 

The 27mm is obviously a no go as 27mm * 70° vignettes on a 1.25" focusser! What are they thinking!

 

But I got a 19mm one and tested it, the material quality is good, with a nice twisty eyecup.

The visual quality seemed OK to me, but my eyesight is bad, so I am a bad judge!

 

 

Has anyone else tried them? What do you think about them?

 

Clear Skies,

Cyrille



#2 rustynpp

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Posted 12 September 2019 - 06:49 AM

I believe these are the same EPs as were discussed in the thread below.

 

https://www.cloudyni...hese-eyepieces/


Edited by rustynpp, 12 September 2019 - 06:49 AM.


#3 Miranda2525

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Posted 12 September 2019 - 07:28 AM

Not "new" at all, but just copies of the Orion Edge On eyepieces. The 27mm is Def not 70 degrees, it is 53 degrees.

 

These below look somewhat new.

 

https://www.telescop...ieces/e/409.uts


Edited by Miranda2525, 12 September 2019 - 07:30 AM.

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#4 25585

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Posted 13 September 2019 - 05:59 AM

Miranda, same optics as the APMs (& Altair) UFF, but no 30mm?


Edited by 25585, 13 September 2019 - 06:04 AM.


#5 pregulla

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Posted 13 September 2019 - 09:59 AM

https://www.cloudyni...epieces-advice/

#6 Starman1

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Posted 13 September 2019 - 05:21 PM

Miranda, same optics as the APMs (& Altair) UFF, but no 30mm?

No.  They are the same as these:

https://www.cloudyni...evue/?p=7384230

They're made by Barsta and sold under the following labels:

365 Astronomy Andromeda Extra Flat
Astromania Premium Flatfield
BST (Barsta) Flat Field
Lunt "Solar Eyepieces", Flat field
Omegon Flatfield
Orion EF
Skywatcher ExtraFlat Wide Angle
Telescope Service Edge-On Flat Field

It may be hard to find them now under the name Astrotech.



#7 fcathell

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Posted 15 September 2019 - 02:05 PM

How is the blackout/kidney bean effect in these Barsta/BST eyepieces?  I can live with reduced eye relief but not blackout or excessive kidney beaning.  These drive me crazy!

 

Frank



#8 Starman1

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Posted 15 September 2019 - 05:03 PM

https://www.google.c...=UTF-8&oe=UTF-8

over 25 decent reviews scattered in the first few pages of the search.

And there are links in the links to more reviews.

No one seems to comment on any spherical aberration of the exit pupil.

That could relate to the experience of the reviewers.

But then, these are not really wide field eyepieces, either,

Flat Field 8.0 1.25 60°
Flat Field 12.0 1.25 60°
Flat Field 16.0 1.25 60°
Flat Field 19.0 1.25 65°
Flat Field 27.0 1.25 53°

The reviews all seem to be of the 3 longer focal lengths as well.

 

Looks like they may be good in your Maks, but poor in the f/6 scope.


Edited by Starman1, 15 September 2019 - 05:04 PM.



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