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Thread: It's like looking through a port hole.

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    Default It's like looking through a port hole.



    I purchased a couple of Naglers a while back. One of my buddies told me that they are great eyepieces. However, they are like looking through a port hole on a ship. He's right.
    There is a border around the outer portion of the lens that makes the view seem somewhat restricted. Hence, the port hole effect.
    It doesn't really effect the viewing. But it does take some getting used to.
    Scopes; Orion SkyQuest XT10. Stellarvue SVA130, 3" FT focuser. William Optics GT-71. Orion 10" f/3.9 Astrograph.
    Mounts; Orion Atlas EQ-G. Celestron CGX-L.
    Eyepieces; Sirius Plossl 25mm. Stratus 17mm. Edge-On Planetary 5mm. Nagler 9mm. Nagler 12mm. Morpheus 12.5mm. Morpheus 9mm.
    Cameras; Nikon D5200 modified, D7100, and D800. ZWO ASI294.
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    Default Re: It's like looking through a port hole.

    Google "telescope field of view" and troll this forum and others for an interesting study of human interaction and the vast range of opinions about psycho-physical human perceptions. There are so many factors that get disproportionately emphasized when individuals state their preferences in eyepiece performance characteristics that even the most experienced observers become alternately confused and exasperated by "opinions" that are insistently proclaimed as universal truths. Clearly some basic knowledge of optics is necessary, but it amazes me how many seasoned observers only consider one or two traits as important and ignore obvious flaws, once their "gut" has told them that they like a certain eyepiece. This doesn't even include those who trash eyepieces that don't perform well in their particular scope even though the manufacturer has specifically stated that it is optimised for a different scope design and will NOT perform well in the scope that the trasher is using.
    Pitter and ProfEclipse like this.

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    Default Re: It's like looking through a port hole.

    I hope you meant trawl this forum, rather than troll it
    All opinions you read here are given freely and are worth every cent.

    Meade LS8 and
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    Default Re: It's like looking through a port hole.

    Quote Originally Posted by Gfamily View Post
    I hope you meant trawl this forum, rather than troll it
    I meant troll as in trolling for fish, but it seems current internet "Trolls" have turned my good word into a bad one. Thanks for the tip and all my future trolling will be done from a trawler.

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    Default Re: It's like looking through a port hole.

    I've never heard of trolling for fish. A new word, thanks
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    All opinions you read here are given freely and are worth every cent.

    Meade LS8 and
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    Default Re: It's like looking through a port hole.

    We Canadians sit between you folks who invented the language and claim to be masters of it and the Americans who claim to be the masters of pretty much everything (like that statement isn't going to provoke any comment). I expect that "troll" is a bastardization of "trawl", but it is now in common use. Google "trawling motors" then Google "trolling motors" and you will see which is more popular, at least on the "wrong" side of the Atlantic.
    j.gardavsky likes this.

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    Default Re: It's like looking through a port hole.

    "Salmon trawler" is one example

    Worked on one of these trolling for salmon off the California coast in the early 70's.
    I don't know if they do this kind of fishing near the UK or not.

    https://www.google.com/search?client...UTF-8&oe=UTF-8
    Jan 2014, an old Celestron Firstscope 114 reflector followed me home from the thrift store, in serious need of care & repair...That started an addiction of sorts. My most recent purchase: A 12" F5 steel tube, beater Dob.
    In between, I bought...more...stuff. Errors using my beaters seems less painful. With luck, I would like to push some glass soon. I have the requirements in hand now. An observatory would be the best change if I could somehow manage it. As for me: "Getting old sucks."

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    Default Re: It's like looking through a port hole.

    There is a degree of individual taste involved. 82* AFOV eyepieces are quite popular. But I've bought a set of Nagler's and sold them because I dislike the amount of pincushion distortion. Then I forgot about that and a few years later got another set. Reminded myself of the pincushion distortion and ditched them too.

    On the other hand I like the 100* AFOV ES eyepieces. They have pincushion distortion too but there I know I'm strictly going for wide fields and don't care about accuracy. At 82* the field of view just isn't wide enough to make the pincushion distortion acceptable.

    So I've vowed never again an 82* AFOV eyepiece unless it's freer from pincushion than Naglers and clones.

    My favorites are 70* Panoptics and Delos, the 100* ES, and then ultra clinical eyps like orthoscopics and pseudo Masuyamas.

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