2” 50 - 60mm EP’s

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Tylerbo
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Re: 2” 50 - 60mm EP’s

#21

Post by Tylerbo »

have you seen or read up on EXPLORE SCIENTIFIC'S 52 degree EP's there great for visuals and have a great price to boot it might be worth looking into as well.
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LDW47 Canada
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Re: 2” 50 - 60mm EP’s

#22

Post by LDW47 »

I prefer 2” with a min. FOV 70° eps !
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Re: 2” 50 - 60mm EP’s

#23

Post by LDW47 »

Today I ordered a 2”, 65mm, 70° SW, XL Plossl from Russell Optics !
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Bigzmey United States of America
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Re: 2” 50 - 60mm EP’s

#24

Post by Bigzmey »

LDW47 wrote: ↑Wed Sep 11, 2019 12:32 am Today I ordered a 2”, 65mm, 70° SW, XL Plossl from Russell Optics !
Gary Russell makes good quality EPs. BUT! You can't get 70 deg FOV out of 2" EP above 40mm. It is physically impossible.

Max FOV of 2" 55mm EP is about 50 deg, of 2" 65mm EP is about 40 deg.
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.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2437, Comets: 34, Asteroids: 257
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Re: 2” 50 - 60mm EP’s

#25

Post by notFritzArgelander »

Bigzmey wrote: ↑Wed Sep 11, 2019 12:45 am
LDW47 wrote: ↑Wed Sep 11, 2019 12:32 am Today I ordered a 2”, 65mm, 70° SW, XL Plossl from Russell Optics !
Gary Russell makes good quality EPs. BUT! You can't get 70 deg FOV out of 2" EP above 40mm. It is physically impossible.

Max FOV of 2" 55mm EP is about 50 deg, of 2" 65mm EP is about 40 deg.
Yep! 2" OD limits the AFOV even if there isn't a field stop. Last time I use the Russell 65mm it was 40 degrees AFOV.
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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LDW47 Canada
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Re: 2” 50 - 60mm EP’s

#26

Post by LDW47 »

You guys are right, I misquoted the 70° from somewhere but I know I am going to love that ep ! A great compliment to my 2”- 30mm, 40mm and 50mm eps !
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Bigzmey United States of America
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Re: 2” 50 - 60mm EP’s

#27

Post by Bigzmey »

LDW47 wrote: ↑Wed Sep 11, 2019 2:59 am You guys are right, I misquoted the 70° from somewhere but I know I am going to love that ep ! A great compliment to my 2”- 30mm, 40mm and 50mm eps !
No doubt, enjoy your new EP!
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.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2437, Comets: 34, Asteroids: 257
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