Explore Scientific FPL 165mm Triplet Refractor

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helicon United States of America
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Explore Scientific FPL 165mm Triplet Refractor

#1

Post by helicon »


Is this the "king" of refractors?

Just came across this model and it looks sweet! A bit pricey though.

https://optcorp.com/products/explore-sc ... -refractor
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
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Re: Explore Scientific FPL 165mm Triplet Refractor

#2

Post by Greenman »


Wish list time... Sorry. I meant no chance list. I confuse those...
Cheers,

Tony.

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Smart Scope: Dwarf II - Club and outreach work.

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Re: Explore Scientific FPL 165mm Triplet Refractor

#3

Post by Lady Fraktor »


helicon wrote: Thu Jun 18, 2020 3:30 pm Is this the "king" of refractors?
:lol: No, a nice finderscope for one but definitely not king.

There are many companies making refractors up to 250mm on a regular basis and right now the APM/ LZOS 510mm is the largest triplet commercially offered.
https://www.apm-telescopes.de/en/telesc ... 0-cnc.html

My dream retirement refractor is their 203mm f/9
https://www.apm-telescopes.de/en/telesc ... lw-ii.html
If you look at the images below the refractor, the finderscope is a Takahashi 128mm or 130mm
See Far Sticks: Antares Elita 103/1575, AOM FLT 105/1000, Bresser BV 127/1200, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, AXJ, AXD
Az/Alt: AYO Digi II/ Argo Navis, Stellarvue M2C/ Argo Navis
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Takahashi prism, TAL, Vixen flip mirror
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Re: Explore Scientific FPL 165mm Triplet Refractor

#4

Post by helicon »


Wow Gabby that one is really sweet! Probably need an obsy with a semi-permanent mount.
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: Explore Scientific FPL 165mm Triplet Refractor

#5

Post by Lady Fraktor »


There are a few different reasons why I find the ES 165mm suspect on quality but I am working at the moment and will need to get offline right away.
I actually discussed these refractors on AF.net a couple of years ago after having a conversation with Roland from Astro-Physics.
I will elaborate later and see if I can find the posting as well.
See Far Sticks: Antares Elita 103/1575, AOM FLT 105/1000, Bresser BV 127/1200, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, AXJ, AXD
Az/Alt: AYO Digi II/ Argo Navis, Stellarvue M2C/ Argo Navis
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Takahashi prism, TAL, Vixen flip mirror
Eyepieces: Antares to Zeiss
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Re: Explore Scientific FPL 165mm Triplet Refractor

#6

Post by Makuser »


Hi all. And let's not forget this great new refractor dream machine:
https://www.stellarvue.com/stellarvue-s ... refractor/
Well, what the heck, it's only money. I guess I'll just keep on buying lottery tickets. :lol:
Marshall
Sky-Watcher 90mm f/13.8 Maksutov-Cassegrain on motorized Multimount
Orion Astroview 120ST f/5 Refractor on EQ3 mount
Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount
Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount.
Orion XT12i 12" f/4.9 Dobsonian Intelliscope.
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Re: Explore Scientific FPL 165mm Triplet Refractor

#7

Post by Juno16 »


Makuser wrote: Thu Jun 18, 2020 6:31 pm Hi all. And let's not forget this great new refractor dream machine:
https://www.stellarvue.com/stellarvue-s ... refractor/
Well, what the heck, it's only money. I guess I'll keep on buying lottery tickets. :lol:
Even though I am an ES fan and am very fond of my ED102, I would go with your suggestion Marshall! Give me the Stellarvue!

Of course, I will do without both and that is quite okay. Maybe I ought to start buying lottery tickets though!
Jim

Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), Orion 50mm Guide Scope, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, Orion SSAG, IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
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Re: Explore Scientific FPL 165mm Triplet Refractor

#8

Post by Unitron48 »


Makuser wrote: Thu Jun 18, 2020 6:31 pm Hi all. And let's not forget this great new refractor dream machine:
https://www.stellarvue.com/stellarvue-s ... refractor/
Well, what the heck, it's only money. I guess I'll just keep on buying lottery tickets. :lol:
Agree, Marshall! I could live with the SVX-152!!

Dave
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Stellarvue SVX127D
http://www.unitronhistory.com

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Re: Explore Scientific FPL 165mm Triplet Refractor

#9

Post by Bigzmey »


Based on my experience with 102mm and 127mm ES triplets I would not hesitate buying ES again.

However, $12,000 for 6.6" ES triplet when you can get 6" ES triplet for under $4,000? Now we are really talking diminishing returns. :lol:
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2382, Comets: 34, Asteroids: 255
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Re: Explore Scientific FPL 165mm Triplet Refractor

#10

Post by Lady Fraktor »


Bigzmey wrote: Thu Jun 18, 2020 10:23 pm However, $12,000 for 6.6" ES triplet when you can get 6" ES triplet for under $4,000? Now we are really talking diminishing returns. :lol:
You do have to remember that FCD1 is also almost 5x cheaper to make than FPL-53.
Depending on the quality it could be much more than diminishing returns.
There are also multiple quality levels of both glass and then also what scratch/ dig ratio which of course we as consumers of mass produced optics will never actually know.
You can do some testing and infer a few things about the quality but that is about it.

I would also be quite happy with the Stellarvue 152mm, I wonder how it would hold up against my modified Celestron C6-R? :lol:
See Far Sticks: Antares Elita 103/1575, AOM FLT 105/1000, Bresser BV 127/1200, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, AXJ, AXD
Az/Alt: AYO Digi II/ Argo Navis, Stellarvue M2C/ Argo Navis
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Takahashi prism, TAL, Vixen flip mirror
Eyepieces: Antares to Zeiss
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Re: Explore Scientific FPL 165mm Triplet Refractor

#11

Post by pakarinen »


I have a 5 Euro bill left from a business trip to Ireland. Only need another 494,995 or so.
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Re: Explore Scientific FPL 165mm Triplet Refractor

#12

Post by Bigzmey »


Lady Fraktor wrote: Fri Jun 19, 2020 3:38 am
Bigzmey wrote: Thu Jun 18, 2020 10:23 pm However, $12,000 for 6.6" ES triplet when you can get 6" ES triplet for under $4,000? Now we are really talking diminishing returns. :lol:
You do have to remember that FCD1 is also almost 5x cheaper to make than FPL-53.
Depending on the quality it could be much more than diminishing returns.
There are also multiple quality levels of both glass and then also what scratch/ dig ratio which of course we as consumers of mass produced optics will never actually know.
You can do some testing and infer a few things about the quality but that is about it.

I would also be quite happy with the Stellarvue 152mm, I wonder how it would hold up against my modified Celestron C6-R? :lol:
I knew the glass type would come out. :) But even hand configured Stellarvue 152mm is better priced than 6.6" ES triplet
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2382, Comets: 34, Asteroids: 255
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Re: Explore Scientific FPL 165mm Triplet Refractor

#13

Post by SkyHiker »


Ridiculous prices. Above 6" go for a mirror. If you really need a 6" Apo, please first try a 6" Mak Newt or the one that Walmart sells, 190 mm aperture for $1500. You may get a new perspective.
... Henk. :D Telescopes: GSO 12" Astrograph, "Comet Hunter" MN152, ES ED127CF, ES ED80, WO Redcat51, Z12, AT6RC, Celestron Skymaster 20x80, Mounts and tripod: Losmandy G11S with OnStep, AVX, Tiltall, Cameras: ASI2600MC, ASI2600MM, ASI120 mini, Fuji X-a1, Canon XSi, T6, ELPH 100HS, DIY: OnStep controller, Pi4b/power rig, Afocal adapter, Foldable Dob base, Az/Alt Dob setting circles, Accessories: ZWO 36 mm filter wheel, TV Paracorr 2, Baader MPCC Mk III, ES FF, SSAG, QHY OAG-M, EAF electronic focuser, Plossls, Barlows, Telrad, Laser collimators (Seben LK1, Z12, Howie Glatter), Cheshire, 2 Orion RACIs 8x50, Software: KStars-Ekos, DSS, PHD2, Nebulosity, Photo Gallery, Gimp, CHDK, Computers:Pi4b, 2x running KStars/Ekos, Toshiba Satellite 17", Website:Henk's astro images
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Re: Explore Scientific FPL 165mm Triplet Refractor

#14

Post by Bigzmey »


SkyHiker wrote: Fri Jun 19, 2020 8:59 pm Ridiculous prices. Above 6" go for a mirror. If you really need a 6" Apo, please first try a 6" Mak Newt or the one that Walmart sells, 190 mm aperture for $1500. You may get a new perspective.
Agree, mirror above 6" is most sensible approach. 8" Edge HD is $1,350. But hey if someone has $$$ to burn and like refractors, why not? :D
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2382, Comets: 34, Asteroids: 255
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Re: Explore Scientific FPL 165mm Triplet Refractor

#15

Post by Lady Fraktor »


Bigzmey wrote: Fri Jun 19, 2020 8:12 pm
I knew the glass type would come out.
[/quote]


Actually no, this is not that other site.
My response about glass types will be about blank sizes/ cost to manufacture and such.
I could care less what the glass type is as long as the design is executed well.

In my signature I have 8 refractors, 6 with BK7/ F2, 2 with OK-4 and one with FPL-53 which I did not know at the time because I did not care what it was made of.
Hardly a CN glass elitest.

PS: Mirrors belong in bathrooms :D
See Far Sticks: Antares Elita 103/1575, AOM FLT 105/1000, Bresser BV 127/1200, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, AXJ, AXD
Az/Alt: AYO Digi II/ Argo Navis, Stellarvue M2C/ Argo Navis
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Takahashi prism, TAL, Vixen flip mirror
Eyepieces: Antares to Zeiss
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Re: Explore Scientific FPL 165mm Triplet Refractor

#16

Post by OhNo »


A waste if it doesn't have a camera stuffed in it Gabby! :tease: :lol:
Scopes: SkyWatcher 8" Quattro, Celestron C8, SkyWatcher ST120, Orion ST80, SharpStar 61EDPH II. SLT 130 Celestron
Mounts: CGEM, CG-4, EQ2, Alt Az, SLT
Cameras: ZWO ASI533MC Pro, ZWO ASI120MM, Canon 1100D
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Re: Explore Scientific FPL 165mm Triplet Refractor

#17

Post by Lady Fraktor »


OhNo wrote: Sat Jun 20, 2020 12:43 am A waste if it doesn't have a camera stuffed in it Gabby! :tease: :lol:
My personal reply would get me banned :lol:
See Far Sticks: Antares Elita 103/1575, AOM FLT 105/1000, Bresser BV 127/1200, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, AXJ, AXD
Az/Alt: AYO Digi II/ Argo Navis, Stellarvue M2C/ Argo Navis
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Takahashi prism, TAL, Vixen flip mirror
Eyepieces: Antares to Zeiss
The only culture I have is from yogurt
My day was going well until... people
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