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Pan 27 vs. ES 28

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#1 Jjones

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Posted 18 January 2014 - 06:06 PM

Does anyone know of a shoot-out between the Pan 27 and the ES 28? Any opinions as to which is better?

#2 BDS316

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Posted 19 January 2014 - 09:37 AM

:gotpopcorn:

There have been some shootouts comparing the 27 Pan to the Meade 5000 28 which is optically either very similar or identical to the ES 28mm 68*. I don't have the link but you can google it.

#3 russell23

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Posted 19 January 2014 - 10:19 AM

I've owned both but not at the same time. For me the huge drawback to the 27mm Pan is the very strong pincushion distortion which can induce seasickness when sweeping starfields. I love the 28mm ES68. It is very comfortable with very mild pincushion. It provides nice sharp lunar views, barlows very well, has no edge of field brightening. The Pan is probably sharper at the edge, but the ES68 holds up well at the edges in my f/5.7 refractor.

Others have reported less favorable results with the ES68 edge performance in a fast dob.

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#4 ohioalfa64

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Posted 19 January 2014 - 12:23 PM

Do they overlap each other in their usage performance, marketing, customer-base? Because price-wise, they are far apart. Does the ES equally perform/outperform in f/5.7 and longer FL's, while the Pan is better in faster scopes (such as f/4-5 Dob's)? It seems hard to get a straight answer and is almost as difficult as ES30/82 vs N31.

#5 russell23

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Posted 19 January 2014 - 03:24 PM

Do they overlap each other in their usage performance, marketing, customer-base? Because price-wise, they are far apart. Does the ES equally perform/outperform in f/5.7 and longer FL's, while the Pan is better in faster scopes (such as f/4-5 Dob's)? It seems hard to get a straight answer and is almost as difficult as ES30/82 vs N31.


It really depends upon what your preferences are. If you need an eyepiece to be sharp to the edge the Pan will be the better choice in fast scopes. If you don't like strong pincushion when panning and can tolerate some loss of sharpness near the edges then the ES68 is the better choice. I would say that at longer F/ratios the edge performance advantage of the Pan must disappear.

Personally, I really liked the 28mm ES8 from the first use whereas I disliked the 27mm Pan from the first use. The presentation of all the ES68's is very engaging.

Dave

#6 Jjones

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Posted 19 January 2014 - 05:53 PM

I intend to use it predominately w/ a 12.5" f/5. My main concerns are exit pupil (old eyes), eye relief (I wear glasses), and Afov. Either the Pan 27 or the ES 28 fits the bill. It sounds as if the Pan 27 is a bit more consistent in quality and the ES 28 perhaps a bit less...?

#7 ohioalfa64

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Posted 19 January 2014 - 07:00 PM

That is not what I see written. I too am puzzled about which or if both function in my 12.5" f/4.6 Dob. I think your question is good.

#8 johnnyha

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Posted 19 January 2014 - 08:13 PM

I have owned both and preferred the ES 28mm 68. Flatter field, more comfy, less "brown-outs". The Pan 27 was sharper at the very very edge if that floats yer boat - but IMHO that comes with a price (see above).

#9 Starman1

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Posted 19 January 2014 - 08:31 PM

My experience was that the ES28:
--had more scattered light internally, making it less appropriate for lunar viewing or when really bright objects were just outside the field.
--the ES had a fair amount of astigmatism in the last ten degrees near the edge.

The above remarks were from use in a 12.5" f/5 scope WITH Paracorr.
Without Paracorr, coma would have obscured any astigmatism.

Both seemed to have about the same effective eye relief though the Panoptic seems a little longer--must be the nature of the top.
The Panoptic is almost exactly the same weight, has the same number of elements, but is roughly 75% more expensive at current prices.
If you pan slowly, or use a computerized scope (GoTo or DSC), the rectilinear distortion will not be apparent.
But I agree the 27 Panoptic is not the eyepiece for a "comet hunter" who sweeps back and forth a lot.

#10 Starman81

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Posted 19 January 2014 - 09:49 PM

I had the ES68 28 for a year and used it a lot in my 8" dob. I used it more than my Pan 35 as it darkened the sky background with its increased magnification. It was great as a low power finder, very comfortable to use. Any edge aberrations in the f/5.9 were not distracting. I also had a Pan 27 for a very short while at the same time to do some comparisons, but the Pan 27's usable eye relief was a tad bit short for me. It was probably 16-17mm while the ES68 28 has about 18mm. That made the difference for me. If you could do with the slightly less ER and demand greater edge performance, the Pan would be the better choice. You'll just have to save up a lot more pennies.

#11 mark379

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Posted 20 January 2014 - 09:34 PM

To my eyes, the 27 pan and 28 ES were very similar in performance. The ES is a money saving value there! ;)

The 30 Es 82 and 31 Nagler T5 were a much different story, with the Nagler being much better in the outer 2/3 of the field.

Do they overlap each other in their usage performance, marketing, customer-base? Because price-wise, they are far apart. Does the ES equally perform/outperform in f/5.7 and longer FL's, while the Pan is better in faster scopes (such as f/4-5 Dob's)? It seems hard to get a straight answer and is almost as difficult as ES30/82 vs N31.








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