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Thread: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

  1. #1
    PhilipLangley's Avatar
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    Default 16mm 1.25" ES68° vs. 24mm 1.25" ES68°



    In the wake of the recent Explore Scientific sale, and the rush on their eyepieces, may I ask any reader who is fortunate enough to now own both the 16mm 1.25" ES68° and the 24mm 1.25" ES68° eyepieces the following favor.

    Will you please be so kind as to post some photos showing them side by side. A photo showing them from above will also be useful. This for over all size comparison.

    I have their dimensions and weights as listed on the ES USA website. The photos of these two eyepieces on the same website, when compared side by side, do not seem to gel with these.

    Thank you.

  2. #2
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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Phillip, not sure if this will help any, but at Astronomics, they show each next to a quarter for reference.

    https://www.astronomics.com/explore-...eces_c495.aspx

    The 24mm looks bigger to me as I would expect.

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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Then there is this picture from a search on the Net:


    The left two are the 16mm and 24mm respectively.


    One of those pics is a bigger one, not sure why the old pic is still showing. Found a bigger picture. I got it from Aegena Astro's site.

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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Here they are in a case (also from Astronomics - I'm trying to give credit where credit is due to where these pics all came from):

    Attachment 134615

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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Eric, thank you for your posts #2, #3 and #4 which show photos of the indicated eyepieces. I appreciate your efforts on my behalf, I really do. Perhaps I was somewhat tardy when not strongly emphasizing that I had already done an on-line search of my own for such comparative photos. I have already reviewed all those exhibited by Explore Scientific and Astronomics but without satisfaction.

    Please let me explain and these comments do not apply to the photo in your post #4.

    If you look closely at the photo in post #2 and compare the apparent width/diameter of all three of the 1.25" barrels, you will quickly see that the barrel of the 16mm appears to be much wider than those of the other two. Why would that be? The three photos are not at the same scale. The 16mm appears to have been boosted to make it appear larger than it actually is. Why? Is the 16mm so much smaller than its cousins that the advertiser has to edit the photo to make it appear to be of similar size. Smaller yes, but not by all that much.

    You will see that Explore Scientific USA on their 68° web-page appears to do exactly the same thing. The 16mm is made to appear much larger than it probably is. Their photos, published adjacent to each other, are also not at the same scale and are therefore not useful for my size comparisons.

    In both these examples, I'm very sure that had the 16mm been photographed at the same scale, in the same plane, at the same distance, it would show up as being considerably smaller. I don't care that it is. I'm just concerned why a reputable advertiser/vendor, whom I support, would seem to want to do such a thing?

    What does this tell me about the other 16mm things that they inform me about...things like its eye relief for instance. Can I rely on the information/specs listed? I don't know now.

    Take a look at the photo in your post #3. It shows the 68° kit. Notice the 24mm in the middle of the group. It's barrel is quite clearly behind that of the 34mm, but the RHS edge of its body (belly) is seen to be in front of that of the 34mm. An optical illusion or what? And what does this tell me about the 16mm on the LHS of the group. Is anything in this photo even remotely relative to the other.

    The photo in your post #4 shows the offered 68° kit in a carry bag. It seems to be 'natural' and the relative sizes of the three eyepieces are somewhat apparent. This is perhaps the only photo of the three that might have been of any use to me. But, as always, I really do need more in this instance.

    I have the 6.7mm, 8.8mm and 11mm 1.25" ES82° eyepieces and have been able to draw some conclusions about the relative sizes of the 16mm and 24mm 1.25" ES68° eyepieces by comparing their published dimensions and weights. Seemingly, the size difference is huge. The 16mm appears as though it is a shrunken skull in comparison.

    Not ever having seen one in real life, I suspect that the 16mm ES68° is indeed a very, very small eyepiece when compared to the others in the series, and particularly to the 24mm. My interest is rooted in just how small and by how much in comparison. And of course, how short is the eye relief actually?

    I hope to eradicate (correct) or validate this suspicion by being able to view them side-by-side in hand or in a photo submitted by a willing and non-biased AF owner of the same. This information is for my personal decision-making use only.

    I have no malice towards ES USA nor its vendors. I am in fact slowly, ever so painfully slowly, accumulating a set of new 1.25" ES eyepieces of my own. This in preference to all other brands. I just don't like unsettling and/or unwanted surprises. And sadly, to date, I have unfortunately endured two of those as I continue to gather together an ES stable of my own. I just do not want the actual real size of the 16mm ES68°, as compared to the 24mm ES68°, to be the third.

    I'm hoping that some kind AF reader will be able to post an actual, own-photo showing the 16mm ES68° and the 24mm ES68° side-by-side and, if possible, also from above.

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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Well to me, the picture in post #2 shows each next to a quarter. It is obvious that the 24mm is larger. Best I could do, until someone chimes in with an actual side-by-side photo for you. Good luck !
    PhilipLangley likes this.

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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Hi Philip. I currently have both of those eyepieces. I will try to take a picture this evening if no one beats me to it. The 16mm is the smallest ES eyepiece I have seen (I owned the 8.8, 11, and 6.7mm before).

    I thought it was a joke when I first opened the 16mm's box. It's tiny compared to the rest.

    I can't really comment on the eye relief though. I don't remember it being too terrible, but I just haven't used it much since I got the ES 100 14mm. I do remember being impressed by its sharp views though. That's why I still have it.

    I searched my pictures and did a Google search. I can't seem to find anyone posting a pic of them side by side. That's strange. I see lots of owner pics of the 82° series, but not the 68°.

    Clear Skies!!!

    -Dan
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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Quote Originally Posted by dhines32 View Post
    Hi Philip. I currently have both of those eyepieces. I will try to take a picture this evening if no one beats me to it.
    Thank you Dan and please, even if there is a forerunner, do go ahead and submit your offering anyway.

    I'm sure that the different perspectives in each photo set would be useful. The more the merrier they say. As for me, well, you just can not have too much information.

    And yes, judging by the listed dimensions and the scaled 'block' sketches that I've made, the 16mm really does appear to be one of the Little People. It must feel ever so tiny in your hand.

    I look forward to your photos and thank you for your kind willingness to assist in this regard.

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    Default Re: 16mm 1.25" ES68° vs. 24mm 1.25" ES68°

    Hi Philip. It was no problem at all. Here are the pics. The 16mm is so tiny that it just fits in the foam in its box.

    ES68-16-24-2.jpgES68-16-24-3.jpgES68-16-24-4.jpg

    Clear Skies!!!

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  10. The Following User Says Thank You to dhines32 For This Useful Post:

    PhilipLangley (05-24-2016)

 

 

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