iOptron ST90?

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pakarinen
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iOptron ST90?

#1

Post by pakarinen »

Ummm, so this just popped up on a random Google search. $189 for a 90mm? (Single speed R&P though.) F5.6

https://www.adorama.com/atiotar90.html? ... dl-gbase-p
Yes, I am Chuck Finley, but all my friends call me "Wassan the Terrible"

Orion ST120, Meade ST80, Skywatcher 90mm Mak
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Nikon Aculon 10x50 / Orion Giant VIew 15x70 / US Navy 1944 Mark 30 7x50 binos

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Refractordude
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Re: iOptron ST90?

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Post by Refractordude »

Found two reviews. Left click the image.
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Telescopes: Celestron 150mm f/8 Refractor, Meade LX70 120mm f/8 Refractor, Vixen 70mm f/12.9 Refractor, Tasco 49N 50mm Red Refractor
Binoculars: Zhumell 20x80 Giant, Oberwerk LW 11x70, Levenhuk Sherman 7x50
Mounts: Orion SkyView Pro Equatorial, Orion Versago II Altazimuth, Farpoint Universal Parrallogram Mount, Orion Tritech II Fluid Head Tripod
Finders: GSO 8x50 Raci, Svbony Red Dot
Diagonals: GSO Dielectric 2", GSO Dielectric 1.25"
Eyepieces: AgenaAstro 8mm-24mm Zoom, Meade 56mm Plossl, GSO Superview 30mm, Astromania-Olivon 22mm, GSO Plossls 32mm/25mm/20mm, GSO 20mm Superview, Svbony 20mm/15mm/9mm/6mm, Svbony Aspheric 23mm/10mm/4mm, Agena Super Wide Angle 15mm, GSO 2" 2x ED Barlow Lens, Few No Name Brand Ebay Plossls
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Lady Fraktor
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Re: iOptron ST90?

#3

Post by Lady Fraktor »

I expect the view will be quite violet when viewing objects.
A bottom line beginners telescope I would probably not recommend.
At 90mm f/5.6 the level of CA would be difficult to filter out.
Proper Telescopes: Antares 105 f/15, Bresser 102 f/13.2, Celestron 150 f/8, Stellarvue NHNGDX 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
Mounts: Berlebach Planet w/ 410mm pier, Celestron AS-GT, Celestron CG-5 w/ Argo Navis & tracking motor, SLT w/ 250mm pier & tripod mods, Manfrotto 028b w/ SV M2C, Mantrotto 055Pro w/ 128RC, Skywatcher EQ-5 w/ dual drives, TAL MT1C w/ wood tripod, Vixen SXP w/ HAL-130 & 200mm half pier
Diagonal: 2" A-P Maxbright, 2" Baader Herschel Wedge (P), 2" Zeiss/ Baader Amici Prism (DX2), 2" Long Perng Amici Prism, 2" Stellarvue DX, 2" TeleVue EverBrite
Eyepieces: Antares to Zeiss
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ARock
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Re: iOptron ST90?

#4

Post by ARock »

Interesting! I did not know anyone still sold these.
Somehow, in achromats, the ST90 and the ST102 do not seem as popular as the ST80 and the ST120.

In other news, I see that the Meade Adventure ST80s are back in stock on Amazon.
AR
Scopes: Zhumell Z8, Meade Adventure 80mm, Bushnell 1300x100 Goto Mak.
Mount: ES EXOS Nano EQ Mount, DIY Arduino+Stepper drives.
AP: 50mm guidescope, AR0130 based guidecam, Canon T3i, UHC filter.
EPs: ES82 18,11,6.7mm, Zhumell 30,9mm FJ Ortho 9mm, assorted plossls, Meade 2x S-F Barlow, DGM NPB filter.
Binos: Celestron Skymaster 15x70 (Albott tripod/monopod), Nikon Naturalist 7x35.
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