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Thread: Zhumell zoom EP

  1. #1
    Davy Jones's Avatar
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    Default Zhumell zoom EP



    Zhumell 1.25 Inch 7-21mm Zoom Telescope Eyepiece - Telescope Eyepieces at Telescopes

    Looks like a pretty good price, I'm going to get it just because I want to experiment with a zoom eyepiece, & figured this was a cheap way to go to start. I was just wondering if anyone has it or have used one similar?
    Orion Space Probe 130EQ fl -900mm fr/6.9. Celestron Zoom. 2X Barlow. SuuntoM2 compass. Left Turn At Orion, Astronomy Guide, 10x50 Bushnell / 20x80 Zhumell binoculars
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    The spec on that EP matches exactly the SkyWatcher 7-21.

    It's very cheap, like the SkyWatcher - but note that VERY narrow AFOV of both models, especially at lower powers. (30°-43°)

    For comparison, the SkyWatcher 8-24, has an AFOV that matches most other popular zooms (40°-60°), but costs roughly twice as much as their 7-21
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    Quote Originally Posted by Davy Jones View Post
    Zhumell 1.25 Inch 7-21mm Zoom Telescope Eyepiece - Telescope Eyepieces at Telescopes

    Looks like a pretty good price, I'm going to get it just because I want to experiment with a zoom eyepiece, & figured this was a cheap way to go to start. I was just wondering if anyone has it or have used one similar?
    I'm not familiar with the Zhumell, however I do have a Celestron
    Celestron - 8 - 24mm 1.25" Zoom Eyepiece - Model Number: CE-93230 - $59.95
    The price is a little more but you get a better FOV. Only thing I have noticed is towards the upper end (9mm) it will distort the image some and normally I find myself backing off just a touch.
    Very happy with the Celestron would recommend it!
    Gordon
    Gordon
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    Quote Originally Posted by ghswen View Post
    I'm not familiar with the Zhumell, however I do have a Celestron
    Celestron - 8 - 24mm 1.25" Zoom Eyepiece - Model Number: CE-93230 - $59.95
    The price is a little more but you get a better FOV. Only thing I have noticed is towards the upper end (9mm) it will distort the image some and normally I find myself backing off just a touch.
    Very happy with the Celestron would recommend it!
    Gordon
    Me too, it is a great accessory for a beginner. When zoomed in with the Zhumell, your target will pass through the FOV faster. Eye relief is probably better in the Celestron, as well.
    Last edited by WWPierre; 08-26-2009 at 04:11 PM.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
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    Thanks guys. Overlooking the FOV was another rookie mistake lol. I think a zoom would be well suited for me, being as I'm concentrating on getting to know the Moon a little better. I hope to be able to identify many of the features soon. I'm still a little nervous changing out the barlows & going to different EP's. I have found myself treating these things like Gold, putting the used one back in the original package all nice & neat like I'm never going to use it again. By then I'm way out of view, reguardless...its all still fun as all get out though. Once I get through this rookie phase, I'll be looking for the good stuff, not that the moon isnt any good to look at, its totally awesome, but you know what I mean. The Barlow I have is a Celestron, I love it, nice look & feel to it. I dont mind spending a few extra bux for a little better quality, I guess you get what you pay for.
    Orion Space Probe 130EQ fl -900mm fr/6.9. Celestron Zoom. 2X Barlow. SuuntoM2 compass. Left Turn At Orion, Astronomy Guide, 10x50 Bushnell / 20x80 Zhumell binoculars
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    Hello Davy...I have the same zoom EP. Here's my take on it:
    Pros:
    Low price
    No distortions (at least to my eyes)
    No distracting reflections
    Nice smooth zoom motion
    Long eye relief compared to my plossls

    Cons:
    Narrow FOV
    Slight (very) vignetting at the 21mm, backing off just a tad (maybe to 20mm?) eliminates this
    Some abnormal darkening of image at 7mm (easing back to around 8mm eliminates this).
    Image not as bright as my Plossls

    I don't use mine very often (tend to prefer the brigher images of the Plossl), but it is handy at times. It makes it easy for me to check out the FL's in between my Plossls. I also like the longer eye relief, this makes it my eyepiece of choice for afocal photography. Overall, it's not a bad EP for the money, but there are times when I kind of wish I'd spent more to get a greater FOV.
    Craig

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    Quote Originally Posted by Davy Jones View Post
    ........ I guess you get what you pay for.
    Not always, I am finding out
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    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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    I have the 8 to 24. I think I paid $60 for it. It is convienent especialy if you are not using a tracking mount. There is false color on the edges of bright objects like Jupiter (occasionaly) and the moon. (almost always shows on the bright edge) DSO'S and stars look normal to me. Don T.

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    Quote Originally Posted by Don Trinko View Post
    I have the 8 to 24. I think I paid $60 for it. It is convienent especialy if you are not using a tracking mount. There is false color on the edges of bright objects like Jupiter (occasionaly) and the moon. (almost always shows on the bright edge) DSO'S and stars look normal to me. Don T.
    I haven't noticed the color aberration in my Celestron.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
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    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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