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APM Ultraflat 30 mm: Initial impression

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156 replies to this topic

#151 emilslomi

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Posted 14 July 2020 - 08:14 AM

    Hello ,

 

 

                How does the APM 24mm UFF eyepiece perform compared to the 30mm UFF , the same or somewhat so .

 

                                                   Thank you .

They are my max AFOV eyepieces for binoviewing, and working together with Morpheus for higher magnifications. I really appreciate them, in particular the very comfortable views. I picked the Altair version because of the anodizing. Got a bit tired of black. No problem ordering and speedy delivery.

 

Emil


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#152 25585

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Posted 14 July 2020 - 08:33 AM

It would be interesting if Altair released their own version of APM's 12.5mm 84°.



#153 Alan White

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Posted 20 July 2020 - 10:24 AM

Just to post here I have sold a 27 mm Panoptic and
I have on order (in the UK) an APM UFF 30 mm.

Based on rave reviews all over and the need to wear my glasses observing now.
Not in stock at present but expected within the next week or so I am told.
 


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#154 25585

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Posted 20 July 2020 - 03:55 PM

Just to post here I have sold a 27 mm Panoptic and
I have on order (in the UK) an APM UFF 30 mm.

Based on rave reviews all over and the need to wear my glasses observing now.
Not in stock at present but expected within the next week or so I am told.
 

Hi Alan and welcome.gif  to CN waytogo.gif

 

Great eyepiece the APM. Altair's 30mm Ultraflat is the same in their own different colour.

 

Both are fine with glasses. Better performing than an ES68 or Maxvision 28mm.

 

I like the APM 24mm UFF as well. Its not quite as good, but has just got enough eye relief for glasses, unlike the 24mm Panoptic & ES68.


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#155 Thomas_M44

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Posted 20 July 2020 - 05:06 PM

Apparently, the same optics, but not the same package.

The Altair has a steel bottom, where the APM has an aluminum bottom.

Also, there is a shiny unblackened lower side to the field stop in the Altair, versus a blackened one in the APM.

It's been photographed, but I don't remember whether that post was on CN or SGL.

So though they are ostensibly the same, they are different in more than just color.

Anyone have insight as to who might be manufacturing the lenses for all of these various 'ultra flat' EP's such as the APM's and Altair's ?

 

Note: I just received a William Optics 10mm 'Cateye' flat-field EP. The claimed 16mm ER and 60-deg AFOV are identical to what is claimed by APM and Altair for their 10mm ultra-flat EP's.

 

So I presume housings and perhaps coatings might be the significant variables between these various brands of  ' ultra flat field' EP's?

 

I apologize if these questions have already been posted.


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#156 Starman1

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Posted 20 July 2020 - 05:10 PM

KunMing United Optics, or KUO, in China.

They've had a long relationship with William Optics, Meade, Celestron, APM, Telescope Service, Stellarvue, et.al. 

That is for the "Ultra Flat Field" eyepieces from APM and Altair.

The "Flat field" eyepieces sold by a ton of companies under private label are from Barsta in China.


Edited by Starman1, 21 July 2020 - 09:49 AM.

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#157 MrJones

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Posted 21 July 2020 - 09:17 AM

Anyone have insight as to who might be manufacturing the lenses for all of these various 'ultra flat' EP's such as the APM's and Altair's ?

 

Note: I just received a William Optics 10mm 'Cateye' flat-field EP. The claimed 16mm ER and 60-deg AFOV are identical to what is claimed by APM and Altair for their 10mm ultra-flat EP's.

 

So I presume housings and perhaps coatings might be the significant variables between these various brands of  ' ultra flat field' EP's?

 

I apologize if these questions have already been posted.

A lot of the lenses are made in Taiwan. They have quite a busy optical industry going there and many of the big China optics conferences are in Taipei City. GSO and WO I know are in Taipei City. Some of the lenses go to the mainland.


Edited by MrJones, 21 July 2020 - 09:27 AM.

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