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Thread: Explore Scientific EP kits - why mix barrel sizes?

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    Default Explore Scientific EP kits - why mix barrel sizes?



    Okay,

    So I'm really chomping at the bit to get a few new EPs, and I really like the Explore Scientifics.

    I considered 1 or more of the kits they offer until I realized they mix 1.25" and 2" barrels. And I was like "whaaaaaaaaaaaaaat?"

    That doesn't really make sense to me, but maybe someone can beat it in to me. I can (almost) see, if you have 2" optics getting one of the kits and being able to use a 1.25 barrel EP with an adapter for your 2" diagonal/focuser, although you're still not getting the full advantage of 2" optics. But say you've got 1.25" optics (like I do), that means that half the EPs in the kits are useless to me.

    I get that they don't make every focal length in every FOV in every barrel size. I just think that if they are going to mix EP series, they'd mix FOV's instead of barrel size, like a 68* 24mm and a 82* 11 and 6.7mm.

    I'm not all butt hurt about it and going to complain to the company about how it's "unfair" or whatever, I just think I'm missing something as to why they'd mix barrel sizes in a kit. Can the barrels be converted to 1.25"?
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    Telescope(s): Celestron 8" Edge HD with AVX mount, Meade ETX80
    EPs: Plossl's: 40, 26, 12, 9.7, 6.4, Explore Scientific: ES68-24mm, ES82-11mm
    Other stuff: Custom transport case with integrated 12v power, 8" Astrozap solar filter, and a family to enjoy astronomy with!


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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    With an 82º AFOV, you need a larger barrel size to enjoy the full potential with the longer focal lengths. As you decrease focal lengths, it makes no sense to remain at a 2" barrel size, so cost and material can be saved on the shorter FL's by using a 1.25" barrel size.

    If you look at the ES 68º series, this smaller AFOV is reflected by the 1.25" being present "further up the scale" in focal lengths. The inverse is evident with the ES 100º series as even the shorter FL EP's have a 2" barrel size to accommodate a larger AFOV.

    I have the whole 82º series, and most sessions I employ the 24mm down to the 8.8mm on galaxies. I have a 2" focuser with an adapter, and I typically run the gamut of these eyepieces on most of the galaxies I'm observing.

    With a 1.25" focuser, I'd be looking more at the 68º vs. the 82º.
    Bryan

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    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    okay, so really, the kits are geared towards people with 2" focusers. That certainly makes sense, just too bad it doesn't really pan out if you have 1.25" optics. Which, I guess is better (budget wise) since I'm only *really* looking at getting 2 EPs (24 and 14 maybe). I think I'd just be too temped to get a kit because "look honey, see how much money I saved by getting a kit with 4 EP's instead of only 2?"

    I guess I'll have to make my own "kit" then... I don't see a need to convert to 2" optics on my 8" SCT at this point. Maybe if I get that 16" dob I dream about, I'll covert everything else over to 2" and sell off the 1.25" stuff...
    Telescope(s): Celestron 8" Edge HD with AVX mount, Meade ETX80
    EPs: Plossl's: 40, 26, 12, 9.7, 6.4, Explore Scientific: ES68-24mm, ES82-11mm
    Other stuff: Custom transport case with integrated 12v power, 8" Astrozap solar filter, and a family to enjoy astronomy with!


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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    Quote Originally Posted by jbrandt View Post
    okay, so really, the kits are geared towards people with 2" focusers.... Maybe if I get that 16" dob I dream about, I'll covert everything else over to 2" and sell off the 1.25" stuff...
    Yep, and if I get that 16" dob it's because I stumbled into a pile of cash and I'll be 2" across the board too!

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    5-6 skies...

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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    It's always worth a call to ES to ask if you could mix and match a few and get the kit price. Good folks there at the office and they've always been willing to make a deal whenever I've been in there.

    They might say no, but they might not...
    Bryan

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    f/5; Celestron C6-R f/8; ES AR127 f/6.4; ES AR127 f/9.4; Stellarvue SV102T f/7; ES AR102 f/9.8;
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    ST80A f/5; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
    Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen
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    Eyepieces: GSO Super Plössl 40mm, 32mm, 15mm, 9mm; ES 82° Series; GSO Superview 30mm; Celestron Plössl 26mm, 20mm; ES 70° 25mm; ES Plössl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70° 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62° 9mm; Zhumell Z Series 5mm
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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    Quote Originally Posted by jeepinjeepin View Post
    Yep, and if I get that 16" dob it's because I stumbled into a pile of cash and I'll be 2" across the board too!
    Won't that be the day...

    Although, I gotta say, for what I spent on my 8" SCT/mount, I could double my aperture with a 16" dob. I need to let my bank account stop smoking before I consider anything else like that, though... I might just have to wait until I stumble across a pile of cash.
    jeepinjeepin likes this.
    Telescope(s): Celestron 8" Edge HD with AVX mount, Meade ETX80
    EPs: Plossl's: 40, 26, 12, 9.7, 6.4, Explore Scientific: ES68-24mm, ES82-11mm
    Other stuff: Custom transport case with integrated 12v power, 8" Astrozap solar filter, and a family to enjoy astronomy with!


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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    Quote Originally Posted by bladekeeper View Post
    It's always worth a call to ES to ask if you could mix and match a few and get the kit price. Good folks there at the office and they've always been willing to make a deal whenever I've been in there.

    They might say no, but they might not...
    That's not a bad idea!

    I guess the WORST thing that could happen is they say no, and I stick to my original plan.
    bladekeeper likes this.
    Telescope(s): Celestron 8" Edge HD with AVX mount, Meade ETX80
    EPs: Plossl's: 40, 26, 12, 9.7, 6.4, Explore Scientific: ES68-24mm, ES82-11mm
    Other stuff: Custom transport case with integrated 12v power, 8" Astrozap solar filter, and a family to enjoy astronomy with!


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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    Quote Originally Posted by jbrandt View Post
    okay, so really, the kits are geared towards people with 2" focusers. That certainly makes sense, just too bad it doesn't really pan out if you have 1.25" optics. Which, I guess is better (budget wise) since I'm only *really* looking at getting 2 EPs (24 and 14 maybe). I think I'd just be too temped to get a kit because "look honey, see how much money I saved by getting a kit with 4 EP's instead of only 2?"

    I guess I'll have to make my own "kit" then... I don't see a need to convert to 2" optics on my 8" SCT at this point. Maybe if I get that 16" dob I dream about, I'll covert everything else over to 2" and sell off the 1.25" stuff...
    Generally speaking buying kits are almost never a good idea. You will most likely save money by picking EPs one at the time and exactly tailored for you needs.

    As Bryan saying you will not be able to convert everything to 2", since many EPs in shorter lengths don't come in 2". Also, it is not a biggie. All 2" diagonals come with 1.25" adapter so you are covered for both types.

    ES 68 24mm is a great EP. It provides widest possible FOV in 1.25" barel and can serve as wide field EP in your 8" for now. It provides 0.8 degree TFV in 8" SCT, 1.27 degree with 0.63 reducer. It should be enough for majority of DSOs.
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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    Quote Originally Posted by Bigzmey View Post
    Generally speaking buying kits are almost never a good idea. You will most likely save money by picking EPs one at the time and exactly tailored for you needs.

    As Bryan saying you will not be able to convert everything to 2", since many EPs in shorter lengths don't come in 2". Also, it is not a biggie. All 2" diagonals come with 1.25" adapter so you are covered for both types.

    ES 68 24mm is a great EP. It provides widest possible FOV in 1.25" barel and can serve as wide field EP in your 8" for now. It provides 0.8 degree TFV in 8" SCT, 1.27 degree with 0.63 reducer. It should be enough for majority of DSOs.
    No argument there.

    Even if I paid full price for the 3 I really want ($450) that's still less than the kit ($499) that has one piece I can't really use. If I get them on a $99 sale, that's even better (would save $150)!! I could throw in a 6.7mm or a really nice barlow and be sound as a pound (until the next time there's a sale, that is...)

    "All 2" diagonals come with a 1.25" adapter"

    I assume you mean to fit a 1.25" ep in the diagonal, not to adapt the 2" diagonal to fit a 1.25" visual back, correct?
    Telescope(s): Celestron 8" Edge HD with AVX mount, Meade ETX80
    EPs: Plossl's: 40, 26, 12, 9.7, 6.4, Explore Scientific: ES68-24mm, ES82-11mm
    Other stuff: Custom transport case with integrated 12v power, 8" Astrozap solar filter, and a family to enjoy astronomy with!


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    Default Re: Explore Scientific EP kits - why mix barrel sizes?

    Quote Originally Posted by jbrandt View Post

    "All 2" diagonals come with a 1.25" adapter"

    I assume you mean to fit a 1.25" ep in the diagonal, not to adapt the 2" diagonal to fit a 1.25" visual back, correct?
    Correct, adapter to fit 1.25" EP

    In my non-edge 8" SCT to convert it for 2" I unscrew 1.25" visual back and screw-in 2" SCT diagonal and you all set. As simple as that. It might be more complicated for edge version, since it is designed for AP.

 

 
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