APM 140mm ED, my next intended.

Discuss your refractor type scopes here.
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25585
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APM 140mm ED, my next intended.

#1

Post by 25585 »


Been in my subconscious tempting me. :sprefac: :galleleo:
https://www.cloudynights.com/articles/c ... 20portable.
Unashamed Linda Ronstadt ♡ fan! :dance: :Clap:

Eyepieces from: Aero, Antares, APM, Baader, Brandon, Bresser, Celestron, Datysun, Docter, Explore Scientific, GSO, I R Poyser, Meade, Nikon, Orion, Pentax, Rodenstock, Siberia, Sky-Watcher, Taiso, Takahashi, TAL, Tele Vue, TS, Vernonscope, Vixen, Zeiss.

Scopes from: Altair, Bresser, Lumicon, Orion Optics UK, Sky-Watcher, Takahashi, Tele Vue, TS, Vixen.
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Re: APM 140mm ED, my next intended.

#2

Post by Lady Fraktor »


APM does make some very nice telescopes.
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: APM 140mm ED, my next intended.

#3

Post by Bigzmey »


6" (or 5.5" in this case) refractor is a great telescope to have APO or not. The question is do you want to pay $3,500 for semi-apo 140mm scope when you can get better corrected 127mm APO triplet for $2,400?

https://explorescientificusa.com/collec ... -refractor
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: APM 140mm ED, my next intended.

#4

Post by pakarinen »


Hmmmm...13mm...13mm...

Seriously though, what about weight constraints? Maybe not an issue for 255.
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Re: APM 140mm ED, my next intended.

#5

Post by Jones »


For visual you really need a triple.
Had the APM 152 f8 edapo double and was really disappointed with it when got the TS Optics 130 f7 53 triple. The 130 was noticeably better on the planets.
Arizona- where the sky's are not cloudy all night.

Triple lensed fracs are so yummy when looking at planets.
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Re: APM 140mm ED, my next intended.

#6

Post by Bigzmey »


Jones wrote: Thu Jun 03, 2021 12:44 am For visual you really need a triple.
Had the APM 152 f8 edapo double and was really disappointed with it when got the TS Optics 130 f7 53 triple. The 130 was noticeably better on the planets.
As I suspected, thanks for the first hand feedback.
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: APM 140mm ED, my next intended.

#7

Post by Jones »


I was thinking of the Istar 140 f6.5 triple with fcd100 glass.
It and the APM 140 are both claiming better than .9 strehl .

The Explore Scientific 127 in a carbon tube weighs only 14 pounds.
Think how much less of a mount can carry that. Maybe the SV M2?
Arizona- where the sky's are not cloudy all night.

Triple lensed fracs are so yummy when looking at planets.
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Re: APM 140mm ED, my next intended.

#8

Post by 25585 »


Bigzmey wrote: Wed Jun 02, 2021 7:22 pm 6" (or 5.5" in this case) refractor is a great telescope to have APO or not. The question is do you want to pay $3,500 for semi-apo 140mm scope when you can get better corrected 127mm APO triplet for $2,400?

https://explorescientificusa.com/collec ... -refractor
I have a fully apo 120mm, so 10mm more is not enough really. Don't know of any other 140s apart from the ES triplet. A TEC 140 costs too much. The APM is a compromise, I guess.
Unashamed Linda Ronstadt ♡ fan! :dance: :Clap:

Eyepieces from: Aero, Antares, APM, Baader, Brandon, Bresser, Celestron, Datysun, Docter, Explore Scientific, GSO, I R Poyser, Meade, Nikon, Orion, Pentax, Rodenstock, Siberia, Sky-Watcher, Taiso, Takahashi, TAL, Tele Vue, TS, Vernonscope, Vixen, Zeiss.

Scopes from: Altair, Bresser, Lumicon, Orion Optics UK, Sky-Watcher, Takahashi, Tele Vue, TS, Vixen.
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Re: APM 140mm ED, my next intended.

#9

Post by 25585 »


pakarinen wrote: Wed Jun 02, 2021 11:05 pm Hmmmm...13mm...13mm...

Seriously though, what about weight constraints? Maybe not an issue for 255.
I will be getting a new, larger mount. A 150 F8 is too large & heavy, so an achro F5, which is covered by a Dob, or the APM are my choices, so far.
Unashamed Linda Ronstadt ♡ fan! :dance: :Clap:

Eyepieces from: Aero, Antares, APM, Baader, Brandon, Bresser, Celestron, Datysun, Docter, Explore Scientific, GSO, I R Poyser, Meade, Nikon, Orion, Pentax, Rodenstock, Siberia, Sky-Watcher, Taiso, Takahashi, TAL, Tele Vue, TS, Vernonscope, Vixen, Zeiss.

Scopes from: Altair, Bresser, Lumicon, Orion Optics UK, Sky-Watcher, Takahashi, Tele Vue, TS, Vixen.
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Re: APM 140mm ED, my next intended.

#10

Post by Bigzmey »


25585 wrote: Thu Jun 03, 2021 9:30 am
Bigzmey wrote: Wed Jun 02, 2021 7:22 pm 6" (or 5.5" in this case) refractor is a great telescope to have APO or not. The question is do you want to pay $3,500 for semi-apo 140mm scope when you can get better corrected 127mm APO triplet for $2,400?

https://explorescientificusa.com/collec ... -refractor
I have a fully apo 120mm, so 10mm more is not enough really. Don't know of any other 140s apart from the ES triplet. A TEC 140 costs too much. The APM is a compromise, I guess.
In this case go for it! :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: APM 140mm ED, my next intended.

#11

Post by Lady Fraktor »


The APM 140mm is a very solid performer and you will enjoy it considerably I am sure.
Build quality is excellent, the R&P focuser is solid and the views are superb.
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: APM 140mm ED, my next intended.

#12

Post by Bigzmey »


Lady Fraktor wrote: Thu Jun 03, 2021 6:43 pm The APM 140mm is a very solid performer and you will enjoy it considerably I am sure.
Build quality is excellent, the R&P focuser is solid and the views are superb.
But what about CA? :)
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: APM 140mm ED, my next intended.

#13

Post by Lady Fraktor »


Bigzmey wrote: Thu Jun 03, 2021 6:46 pm But what about CA? :)
What CA?
Seriously though, I had no issues with CA using it and the only time I saw false colour was as the temperature dropped which required a minor refocus or using my 14mm Antares S-W which typically projects a very thin gold line on bright objects when using averted vision.
I cannot recall seeing anything in the view that would stop me from recommending it.
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: APM 140mm ED, my next intended.

#14

Post by Jones »


The doubles I've had did not show ca when in focus. They lose to a triple cause they just do not have the sharpness and contrast that a triple does. They cannot go to really hi powers 350 plus like the triple do.
Arizona- where the sky's are not cloudy all night.

Triple lensed fracs are so yummy when looking at planets.
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Re: APM 140mm ED, my next intended.

#15

Post by Lady Fraktor »


Please do not say that loudly, I would hate for my Stellarvue or Vixen to hear that.
They may start to think they are doing something wrong.

The main advantage of a triplet is it lets you image into the UV and IR further than we can see.
With good quality glass, finishing, polishing and coatings the difference of a high end doublet and triplet is fairly small.
Even 10 years ago it was a different circumstance though.
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: APM 140mm ED, my next intended.

#16

Post by notFritzArgelander »


Lady Fraktor wrote: Fri Jun 04, 2021 3:23 am Please do not say that loudly, I would hate for my Stellarvue or Vixen to hear that.
They may start to think they are doing something wrong.

The main advantage of a triplet is it lets you image into the UV and IR further than we can see.
With good quality glass, finishing, polishing and coatings the difference of a high end doublet and triplet is fairly small.
Even 10 years ago it was a different circumstance though.
Smoothness and accuracy of figure is more important than the number of elements for visual use. Since I can collimate and optimize a doublet on my own bench I have no desire for a triplet. My Stellarvue is confident it can do no wrong. ;)
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: APM 140mm ED, my next intended.

#17

Post by notFritzArgelander »


notFritzArgelander wrote: Fri Jun 04, 2021 4:00 am
Lady Fraktor wrote: Fri Jun 04, 2021 3:23 am Please do not say that loudly, I would hate for my Stellarvue or Vixen to hear that.
They may start to think they are doing something wrong.

The main advantage of a triplet is it lets you image into the UV and IR further than we can see.
With good quality glass, finishing, polishing and coatings the difference of a high end doublet and triplet is fairly small.
Even 10 years ago it was a different circumstance though.
Smoothness and accuracy of figure is more important than the number of elements for visual use. Since I can collimate and optimize a doublet on my own bench I have no desire for a triplet. My Stellarvue is confident it can do no wrong. ;)
PS My collimation set ups cannot handle a triplet, too many degrees of freedom.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: APM 140mm ED, my next intended.

#18

Post by Lady Fraktor »


notFritzArgelander wrote: Fri Jun 04, 2021 4:52 am PS My collimation set ups cannot handle a triplet, too many degrees of freedom.
I have no issues collimating doublets but triplets are a bit too tricky without the proper equipment, I have no problems leaving them to the experts :)
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: APM 140mm ED, my next intended.

#19

Post by Jones »


Some doublets can equal a triple like Vixen and Takahashi. They are made in Japan, and notice the price tags. Do not know where those old Meade 6" f9 edapo doubles were made, had the same ed glass fk61 as the APM 6" f8 edapo first 2 batches. The APM did not succeed in being as good as the Meade.

The Chinese triples are almost as good as the top of the line stuff from everywhere else. Where their doubles will end up on the performance step ladder remains to be seen.
Arizona- where the sky's are not cloudy all night.

Triple lensed fracs are so yummy when looking at planets.
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Re: APM 140mm ED, my next intended.

#20

Post by Lady Fraktor »


You seem to be comparing mass produced to premium optics which you just cannot do.

Mass produced optics will only have a standard of QC at a set price point, where a premium optic QC level will be much higher.

Occasionally you will find a Meade, Skywatcher, Celestron that is better than the rest of their offerings but it is priced accordingly as well.
Those few telescopes get a higher QC level than the rest.
An example is some of the high end Skywatcher that were designed in Belgium (Lichtenknecker Optics), not in China.
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
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