What are the factors that make u suggest the triplet over the doublet?Lady Fraktor wrote: ↑Sat Nov 05, 2022 6:29 pm I thought it was a Photoline triplet. oops!
A good refractor, 2.5" R&P focuser.
Either refractor would work well for you.
If you can afford the triplet get it but if the doublet is easier on the banking account you will not be disappointed.
As to the corrector, the AP voodoo practitioners will have to comment on its worth.
80mm ed triplet
-
- Articles: 0
- Posts: 131
- Joined: Sat Jul 30, 2022 2:27 pm
- 1
- Location: US
- Status:
Offline
Re: 80mm ed triplet
- Lady Fraktor
- Articles: 0
- Posts: 10022
- Joined: Mon Apr 29, 2019 9:14 pm
- 5
- Location: Slovakia
- Status:
Offline
Re: 80mm ed triplet
Either refractor will work very well so initial output is what it comes down to. Telescope + needed accessories etc.
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
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, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1000101)
The only culture I have is from yogurt
- Bigzmey Online
- Moderator
- Articles: 8
- Posts: 7720
- Joined: Sat May 11, 2019 7:55 pm
- 4
- Location: San Diego, CA USA
- Status:
Online
-
TSS Awards Badges
Re: 80mm ed triplet
AstroTech doublets have great following, come with good quality R&P focuser and priced competitively. That would be my suggestion.
https://www.astronomics.com/telescopes. ... series=890
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: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2461, Comets: 34, Asteroids: 261
-
- Articles: 0
- Posts: 131
- Joined: Sat Jul 30, 2022 2:27 pm
- 1
- Location: US
- Status:
Offline
Re: 80mm ed triplet
What is the least loss of focal length a corrector can be for the AT72EDII? Is it 0.8?Bigzmey wrote: ↑Sat Nov 05, 2022 7:33 pm I would stay away from obscure brands, otherwise getting 80mm ED/APO is very little risk. The technology is mature and doublet or triplet from any known brand would work just fine.
AstroTech doublets have great following, come with good quality R&P focuser and priced competitively. That would be my suggestion.
https://www.astronomics.com/telescopes. ... series=890
- Lady Fraktor
- Articles: 0
- Posts: 10022
- Joined: Mon Apr 29, 2019 9:14 pm
- 5
- Location: Slovakia
- Status:
Offline
Re: 80mm ed triplet
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
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, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1000101)
The only culture I have is from yogurt
- JayTee
- Articles: 2
- Posts: 5651
- Joined: Thu Apr 25, 2019 3:23 am
- 5
- Location: Idaho, USA
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: 80mm ed triplet
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
-
- Articles: 0
- Posts: 131
- Joined: Sat Jul 30, 2022 2:27 pm
- 1
- Location: US
- Status:
Offline
Re: 80mm ed triplet
So is a compressor used to make it a faster, wider lens? Do most scopes accept flatteners that don't affectJayTee wrote: ↑Sat Nov 05, 2022 11:59 pm You need to distinguish between the two functions. Is it a field flatter or is it an FL compressor, or is it both? All three of these accessories exist. If all you want is a flat field (I have 2 of these), then a field flattener is what you need. It does not change the FL to a noticeable degree. Compressors are another story.
- JayTee
- Articles: 2
- Posts: 5651
- Joined: Thu Apr 25, 2019 3:23 am
- 5
- Location: Idaho, USA
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: 80mm ed triplet
A
The field flattened also called an
Lastly, if you see an accessory labeled
Use this link to explore all the fun ways to express
https://astronomy.tools/calculators/field_of_view/ or
http://www.stargazing.net/naa/scopemath.htm
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
- Juno16
- Articles: 0
- Posts: 8210
- Joined: Sun May 12, 2019 3:13 pm
- 4
- Location: Mississippi Gulf Coast
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: 80mm ed triplet
That would be the sensor size of the camera that you plan to use.
I moved from a apsc (cropped) sensor
Check out this site to see the
https://astronomy.tools/calculators/field_of_view/
The image below shows the different field of views between the
The image below shows the different field of views between the
Dedicated astro camera prices usually go up considerably with sensor size.
So, if
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), ZWO OAG, 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, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
- chris_g
- Articles: 0
- Posts: 891
- Joined: Fri Jan 15, 2021 4:30 am
- 3
- Location: Louisiana, U.S.
- Status:
Offline
-
TSS Photo of the Day
TSS Awards Badges
Re: 80mm ed triplet
My first scope, I paired it though with the .85 reducer/flattener. Changed the focal length to 530 and
I love it. My last image taken with it and a stock T3i
Image OTA: EvoStar ED80, WO Z73, C8-A XLT
Mount: EQ6-R Pro Pier, AZ-EQ5 Pro Pier
Guide OTA: Orion 60mm, WO 32mm, ZWO OAG, SV501P
Guide Cam: ZWO 120mm, 290mm mini
EAA OTA: Orion ST80
EAA Cam: SVBony SV705C
EP: Baader Hyperion Modular Set
Filters: L-Pro Canon EOS C, L-eNhance, L-Pro, Optolong Ha 7mm, Optolong Oiii 6.5mm, Optolong Sii 6.5mm, ES H-Beta
Session Control: Mini PC/Win11 Pro, APT 4.1, PHD2 2.6.10
Processing: PixInsight, DSS 4.2.6, Adobe PS CC, Astronomy Tools Action Set, Star Spikes Pro
-
- Articles: 0
- Posts: 131
- Joined: Sat Jul 30, 2022 2:27 pm
- 1
- Location: US
- Status:
Offline
Re: 80mm ed triplet
I have the D5500. To see a notciable improvement, what would the lowest cost camera be?Juno16 wrote: ↑Sun Nov 06, 2022 12:19 pm Something else to consider if the scope will be used fir AP (as if there isn’t enough!).
That would be the sensor size of the camera that you plan to use.
I moved from a apsc (cropped) sensor dslr (Nikon D5300) to a dedicated astro camera (ASI533MC-P).
Check out this site to see the fov with different scope/camera configurations.
https://astronomy.tools/calculators/field_of_view/
The image below shows the different field of views between the ES 80mm APO and the Nikon D5300/ASI533.
Capture.JPG
The image below shows the different field of views between the ES 80mm APO and the ASI533 with and without a 0.8 FR.
Capture1.JPG
Dedicated astro camera prices usually go up considerably with sensor size.
So, if AP is in your plans, camera choices and FR's should be considered.
- Juno16
- Articles: 0
- Posts: 8210
- Joined: Sun May 12, 2019 3:13 pm
- 4
- Location: Mississippi Gulf Coast
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: 80mm ed triplet
hatflyer wrote: ↑Sun Nov 06, 2022 6:01 pmI have the D5500. To see a notciable improvement, what would the lowest cost camera be?Juno16 wrote: ↑Sun Nov 06, 2022 12:19 pm Something else to consider if the scope will be used fir AP (as if there isn’t enough!).
That would be the sensor size of the camera that you plan to use.
I moved from a apsc (cropped) sensor dslr (Nikon D5300) to a dedicated astro camera (ASI533MC-P).
Check out this site to see the fov with different scope/camera configurations.
https://astronomy.tools/calculators/field_of_view/
The image below shows the different field of views between the ES 80mm APO and the Nikon D5300/ASI533.
Capture.JPG
The image below shows the different field of views between the ES 80mm APO and the ASI533 with and without a 0.8 FR.
Capture1.JPG
Dedicated astro camera prices usually go up considerably with sensor size.
So, if AP is in your plans, camera choices and FR's should be considered.
Maybe I didn’t explain well enough.
My point was about sensor size and field of view and the need for a focal reducer.
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), ZWO OAG, 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, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
-
- Articles: 0
- Posts: 131
- Joined: Sat Jul 30, 2022 2:27 pm
- 1
- Location: US
- Status:
Offline
Re: 80mm ed triplet
Does anyone make a field flattener that doesn't reduce the focal length for the Astro-Tech AT72EDII? Maybe the Orion Field Flattener for Short Refractors? I'm down to the Apertura 72mm
Any opinions on the 2?
Thanks.
- JayTee
- Articles: 2
- Posts: 5651
- Joined: Thu Apr 25, 2019 3:23 am
- 5
- Location: Idaho, USA
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: 80mm ed triplet
https://www.astronomics.com/astro-tech- ... ctors.html
https://www.highpointscientific.com/hot ... xwQAvD_BwE
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
- chris_g
- Articles: 0
- Posts: 891
- Joined: Fri Jan 15, 2021 4:30 am
- 3
- Location: Louisiana, U.S.
- Status:
Offline
-
TSS Photo of the Day
TSS Awards Badges
Re: 80mm ed triplet
For example, I have an Orion .85 reducer/flattener with 56mm female thread used on a sky watcher 80ED no adapters. I can adapt it to a two inch nose piece. Then I put in the two inch adapter for my Z73 and insert. Now my 440 focal length is 374 and my focal ratio 5.9 is now 5.0
Obviously this affects other things that may or may not be relevant, such as image circle in my case, but it should work, correct?
Image OTA: EvoStar ED80, WO Z73, C8-A XLT
Mount: EQ6-R Pro Pier, AZ-EQ5 Pro Pier
Guide OTA: Orion 60mm, WO 32mm, ZWO OAG, SV501P
Guide Cam: ZWO 120mm, 290mm mini
EAA OTA: Orion ST80
EAA Cam: SVBony SV705C
EP: Baader Hyperion Modular Set
Filters: L-Pro Canon EOS C, L-eNhance, L-Pro, Optolong Ha 7mm, Optolong Oiii 6.5mm, Optolong Sii 6.5mm, ES H-Beta
Session Control: Mini PC/Win11 Pro, APT 4.1, PHD2 2.6.10
Processing: PixInsight, DSS 4.2.6, Adobe PS CC, Astronomy Tools Action Set, Star Spikes Pro
-
- Articles: 0
- Posts: 131
- Joined: Sat Jul 30, 2022 2:27 pm
- 1
- Location: US
- Status:
Offline
Re: 80mm ed triplet
The Astro-Tech seems unavailable. Are u saying the Hotech will do well with the AT72?JayTee wrote: ↑Tue Nov 08, 2022 12:20 am Here are the two I own. The first one, the Astro-Tech says it's for TMB and astro-tech scopes but it works just fine in my ES APO, even better than the Hotech.
https://www.astronomics.com/astro-tech- ... ctors.html
https://www.highpointscientific.com/hot ... xwQAvD_BwE
- JayTee
- Articles: 2
- Posts: 5651
- Joined: Thu Apr 25, 2019 3:23 am
- 5
- Location: Idaho, USA
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: 80mm ed triplet
From the Hotech website:
"HOTECH SCA Field Flattener: It accommodates f5 to f8 refractor telescope. You will see bright and sharp image across the entire field."
Since your AT72 is
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
- JayTee
- Articles: 2
- Posts: 5651
- Joined: Thu Apr 25, 2019 3:23 am
- 5
- Location: Idaho, USA
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: 80mm ed triplet
A
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
-
- Articles: 0
- Posts: 131
- Joined: Sat Jul 30, 2022 2:27 pm
- 1
- Location: US
- Status:
Offline
Re: 80mm ed triplet
Impressions of this scope for
Thanks.
- chris_g
- Articles: 0
- Posts: 891
- Joined: Fri Jan 15, 2021 4:30 am
- 3
- Location: Louisiana, U.S.
- Status:
Offline
-
TSS Photo of the Day
TSS Awards Badges
Re: 80mm ed triplet
As @JayTee confirmed any flattener designed for a refractor that falls within it's focal ratio should work. You just have to be aware of where and how in the image train you are putting it. You might be better off finding another 1:1 flattener then asking for opinions on it.
Clear Skies,
Chris
Image OTA: EvoStar ED80, WO Z73, C8-A XLT
Mount: EQ6-R Pro Pier, AZ-EQ5 Pro Pier
Guide OTA: Orion 60mm, WO 32mm, ZWO OAG, SV501P
Guide Cam: ZWO 120mm, 290mm mini
EAA OTA: Orion ST80
EAA Cam: SVBony SV705C
EP: Baader Hyperion Modular Set
Filters: L-Pro Canon EOS C, L-eNhance, L-Pro, Optolong Ha 7mm, Optolong Oiii 6.5mm, Optolong Sii 6.5mm, ES H-Beta
Session Control: Mini PC/Win11 Pro, APT 4.1, PHD2 2.6.10
Processing: PixInsight, DSS 4.2.6, Adobe PS CC, Astronomy Tools Action Set, Star Spikes Pro
Create an account or sign in to join the discussion
You need to be a member in order to post a reply
Create an account
Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute