Televue 3x Barlow
- davesellars
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Televue 3x Barlow
Would there be any issue with buying a TV 3x barlow that is approx 9 years old? Apparently only used a couple of times and stored for 9 years... Apart from a possibility of fungus because it may not have been stored in a sufficiently dry environment? I can't remember what the price of these were new that long ago...
Starfield ED102 f/7; SW ED80; SW 120ST
EQ5 and AZ4 mounts
Eyepieces: TV Delos 17.3 & 10; Pentax XW 7 & 5; BCO 32,18,10; Fuyiyama Ortho 12.5; Vixen SLV 25.
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Re: Televue 3x Barlow
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, Delos, 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: 3122 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2196, S110: 77). Doubles: 2461, Comets: 34, Asteroids: 261
- davesellars
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Re: Televue 3x Barlow
Starfield ED102 f/7; SW ED80; SW 120ST
EQ5 and AZ4 mounts
Eyepieces: TV Delos 17.3 & 10; Pentax XW 7 & 5; BCO 32,18,10; Fuyiyama Ortho 12.5; Vixen SLV 25.
- Bigzmey Online
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Re: Televue 3x Barlow
I had TV 2x and 3x for a while, both are great barlows. I also liked the planetary views with 3x better than with 2x, although both were good. My suspicion that this is not because of barlow optical quality but of the fact that to achieve the same power one uses longerdavesellars wrote: ↑Wed Mar 16, 2022 6:56 pm Many thanks. I've read that the TV 3x is one of the best and actually better performance than the 2x... Will fit in well either using the Baader BCO 10mm or the 10mm Delos or even the 7mm Pentax for double stars at 306x
Let's say you want effective focal length of ~3mm. With 2 x barlow one need to use ~6mm
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, Delos, 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: 3122 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2196, S110: 77). Doubles: 2461, Comets: 34, Asteroids: 261
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