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Thread: Vixen NPL Plossl 20mm on sale at my local store

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    Default Vixen NPL Plossl 20mm on sale at my local store



    Hello all!
    Today my local astronomy shop has this Vixen NPL Fully Multicoated eyepiece on sale:
    https://www.amazon.com/Vixen-39206-2.../dp/B001AZQ6K2

    I was tempted as the price was good (As Im in Mexico, you can't just make the conversion, suffices to say it is a good deal and a price less to what a 20mm normal basic Meade or Orion eyepiece costs)

    The point is that I already have a Celestron 20mm eyepiece that came with my Astromaster 90mm and Im very happy with such super basic Celestron EP. I can see Jupiter's bands and when seeing red stars the color is really there!

    So the idea of having two 20mm eyepieces seems odd to me. I have a hard time justifying the purchase.

    What could the vixen give me that the basic Celestron can not?

    Thanks all!

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    Default Re: Vixen NPL Plossl 20mm on sale at my local store

    Better quality glass and coatings, better light through put and better build quality. The Vixen are very nice Plossls. Typically much, much better than Meade or Orion
    I am not sure how much it would cost to order one from the USA but the listed price in the ad is just slightly less than the new price for Vixen optics.
    For now I would use the Celestron and save for another focal length eyepiece to use.
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    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
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    Default Re: Vixen NPL Plossl 20mm on sale at my local store

    Quote Originally Posted by Joe GM View Post
    Hello all!
    Today my local astronomy shop has this Vixen NPL Fully Multicoated eyepiece on sale:
    https://www.amazon.com/Vixen-39206-2.../dp/B001AZQ6K2

    I was tempted as the price was good (As Im in Mexico, you can't just make the conversion, suffices to say it is a good deal and a price less to what a 20mm normal basic Meade or Orion eyepiece costs)

    The point is that I already have a Celestron 20mm eyepiece that came with my Astromaster 90mm and Im very happy with such super basic Celestron EP. I can see Jupiter's bands and when seeing red stars the color is really there!

    So the idea of having two 20mm eyepieces seems odd to me. I have a hard time justifying the purchase.

    What could the vixen give me that the basic Celestron can not?

    Thanks all!
    Probably not much! It has a 50° AFOV, and I assume your Celestron is either a plossl (with the same fov), or maybe a Kellner, with around 40-45° FOV. In either case I doubt that you will see much difference, although the Vixen may (should!) have better coatings and glass as Gabby suggests. The centre sharpness will be very similar, although the Vixen may be a bit sharper at the edges, and may have better colour correction. This appears to be the "entry-level" Vixen.

    If I were you I would save up for a while and look at getting something better which will also give you a wider FOV, say an 24mm ES68° or a 32mm TV plossl. You are limited in the true FOV by the 1 1/4" diagonal and the field stop of the eyepiece, so you can't go any bigger than that. (The TV 32mm plossl will give you the maximum possible TFOV for a 1 1/4" eyepiece.)

    All the best,

    Dean
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    Default Re: Vixen NPL Plossl 20mm on sale at my local store

    Thanks both of you, Gabby and Dean!
    Well, I actually have the Orion Sirius Plossl 32mm, I like it, it has 52°AFOV but Im sure the TV is a superior product...
    I heard that with my scopes (Astromaster 90 and NExstar 4SE) there is no point in getting a 40mm as a result of the 1.25" limitation.
    Now, in the same store they are selling the Meade 15mm 4000 series Super Plossl. What do you think about that Meade:
    Series 4000 Super Plössl 15mm
    It fits my budget and it would be a good addition to my small collection (10mm 20mm 25mm 32mm)

    Thanks so much!

    ps: the Vixen in my local store is selling for less than in Amazon (link above) which is a good price considering Im not living in the USA.

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    Default Re: Vixen NPL Plossl 20mm on sale at my local store

    The Meade 4000 is a good eyepiece that will work quite well with your scope.
    If you are interested in Plossls look at the availability or GSO or Sterling Plossls, they are exceptional eyepieces for the price.
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    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
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    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

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    Default Re: Vixen NPL Plossl 20mm on sale at my local store

    I agree: the Meade is a very nice eyepiece. You are correct about the 40mm: the limiting factor for true FOV is the size of the field stop, not the eyepiece FL or Apparent FOV. The maximum field stop for a 32mm diameter eyepiece is around 27mm- which is what the 32mm TV plossl has. The maximum true FOV is given by ((field stop)/FL x 57.3).

    You would get the maximum field with both the TV 32mm Plossl and the TV 24mm Panoptic. I suspect your Orion Sirius 32mm would be the same as well.
    For the Astromaster 90, with a FL of 1000mm and 32mm diameter eyepieces, your maximum true field is just over 1.5°. (i.e.: (27/1000)x57.3 )
    For the NexStar 4SE, with a FL of 1325mm, the maximum true FOV (with the same eyepieces) is about 1.17°.

    If you are interested there are some good articles by Al Nagler about choosing eyepieces (in general: not just Televue!) on the Televue site: Tele Vue Optics: Advice

    - Dean
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    Default Re: Vixen NPL Plossl 20mm on sale at my local store

    Quote Originally Posted by Joe GM View Post
    Thanks both of you, Gabby and Dean!
    Well, I actually have the Orion Sirius Plossl 32mm, I like it, it has 52°AFOV but Im sure the TV is a superior product...
    I heard that with my scopes (Astromaster 90 and NExstar 4SE) there is no point in getting a 40mm as a result of the 1.25" limitation.
    Now, in the same store they are selling the Meade 15mm 4000 series Super Plossl. What do you think about that Meade:
    Series 4000 Super Plössl 15mm
    It fits my budget and it would be a good addition to my small collection (10mm 20mm 25mm 32mm)

    Thanks so much!

    ps: the Vixen in my local store is selling for less than in Amazon (link above) which is a good price considering Im not living in the USA.
    If your 10 and 20mm were Plossl I would say don't bother with NPL. However, your 10 and 20 mm are budget Kellners. I suggest to upgrade them with a better quality EPs when possible.

    I saw a big difference when I switched from budget Kellners to a better quality Plossls even with Orion 90mm refractor I had at that time. The difference was that image in Kellners was darker and narrower.

    So if price is right go for 20mm NPL. Can't go wrong with Meade 15mm 4000 series Super Plossl either for a good price. It will fit nicely in your EPs line up.
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    Default Re: Vixen NPL Plossl 20mm on sale at my local store

    The Vixen NPL's are superb Plossls for the money, nice build and with a shallow, wide safety undercut which eases extraction. I have a few of the NPL's. 20mm and above they feature an unusual plastic twist-up eyecup that click locks into place.

    Vixen 25mm.jpg

    It works pretty well though. I also have TeleVue and Orion 25mm Plossls and a Meade 26mm Plossl. The Vixen is my favourite.

    GSO6,9,12,15 b.jpg

    GSO Plossls are nicely made for the money. The build quality is decent and the drawtubes are aluminium. The ones that feature safety undercuts have a tapered lower undercut lip, like TeleVue, so are easy to extract from any adaptor. They seem well machined with good even blacking/baffling. All have M28.5 x 0.6 filter threads. The coatings are superb.
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