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THE BURGESS 24MM MODIFIED ERFLE & 10MM ULTRAMONO

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#1 BillP

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Posted 24 December 2018 - 12:05 PM

The Burgess 24mm Modified Erfle and 10mm Ultra Monocentric eyepieces are relatively new offerings from Burgess Optical. The Ultra Monocentric has been long promised so nice to see it finally coming to fruition.

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#2 John O'Hara

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Posted 24 December 2018 - 12:38 PM

Thanks for the reviews, Bill.  While no 24 Panoptic, it seems like this eyepiece might meet a nice price point for some, especially at longer f-ratios.



#3 junomike

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Posted 24 December 2018 - 01:58 PM

Seems like a fair eval Bill.



#4 BillP

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Posted 24 December 2018 - 03:12 PM

Thanks for the reviews, Bill.  While no 24 Panoptic, it seems like this eyepiece might meet a nice price point for some, especially at longer f-ratios.

 

No.  It is not in the class of a 24 Pan or 24 ES 68.  But comparing it to the Bresser 25mm 70 degree which appears to be a standard Erfle design, the off-axis in the Burgess is a bit better at the same TFOV points.  Contrast and clarity on-par.  I was perfectly happy with it in my f/8 scopes and performed a little better than the typical Erfle.



#5 John O'Hara

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Posted 24 December 2018 - 03:21 PM

Sounds a lot like the older TeleVue Wide Fields, which were a step up from standard erfles.  I was also perfectly satisfied with my 40 TV WF in my 6" f/8 refractor.  The only reason I sold of the TV WF was to purchase a 40 Pentax XL, which did not upset the balance in my smaller Dobs.  However, the newer Burgess offering would undoubtedly have better coatings.


Edited by John O'Hara, 24 December 2018 - 03:21 PM.


#6 rogeriomagellan

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Posted 25 December 2018 - 10:36 AM

What a joy to read another review by William Paolini. Thank you for the gift.


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#7 denis0007dl

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Posted 31 December 2018 - 03:33 AM

Nice review Bill.

10mm mono performance reminds me to mine test of TMB SMS 10mm + Powermate 2.5x vs ZAO II 4mm and TMB 4mm SMC, in my 10" dob and APM 6" APO, where I prefeered 10mm SMC + Powermate 2.5x combo in terms of comfort, where pict quality was same.


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#8 emilslomi

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Posted 07 January 2019 - 08:01 AM

Nice review. Thanks! My Ultra Mono has similar indents of the field stop. I wonder if there are any without them. Agree with your assessment. Very good eyepiece on axis.




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