Can't Decide 8SE or CPC 800 GPS SCT
- Flyhigh7
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Can't Decide 8SE or CPC 800 GPS SCT
Also, I like the recommendation to get 2" eye pieces but wonder if getting a 2" diagonal and 2" eye Pieces gives a true 2" throughput or is there something in the system that is less than 2" and I'm just adapting it larger.
Also, read where the focus adjustment on the 8SE is not very accurate as far as fine tuning and wondering if the focus on the CPC 800 might be better.
I'm looking for the scope in this range that will yield the brightest deepest objects and I can even afford the CPC 9.25 but I'm concerned about the additional weight. I do like that Celestron says the 9.25 collects 33% more light than a 8" Scope.
I used to have a 6" Reflector so I wonder how much more light will an 8" collect than the 6". Wonder if there is a formula for that.
I recently purchased the Celestron Giant 15*40mm Binoculars and was surprised that they were able to see 4 of Jupiter's moons 2 nights ago. They were just little dots to the sides of the bigger Jupiter dot but it was neat how they were lined up. Couldn't see the orion nebula or anything that looked like a nebula in orion though I saw a review that said you can see nebulas with these binoculars.
I thank you in advance for any 'light' you can give me on these issues.
Regards!
Telescope: Celestron Evolution 9.25 with Celestron Motor Focus
Evolution WiFi Mount Head/ built in 10 Hr Battery and CPC Tripod
Binoculars: Celestron SkyMaster Giant 15x70 / Heavy Duty Tripod
Simmons 10x50
Camera: Canon Digital Rebel XT EOS 350D
Diagonal: Baader 2" BBHS Sitall Mirror
EPs: Baader Hyperion Aspheric 36mm 1.25"/2", Pentax XW 20mm, Pentax XW 7mm,
Tele Vue Delite 11mm, Plossl 40mm & 13mm
Barlow Lens: Tele Vue 2.5x - 1.25" Powermate
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Re: Can't Decide 8SE or CPC 800 GPS SCT
What you are paying more for is the mount, which is substantially beefier (and bulkier!) on the CPC. More stability but a heavier setup to move around.
If you go for the SE, keep in mind that many claim it's undermounted in that setup. An acquaintance of mine used it with a motorfocuser (apparently its a good upgrade right after dew shield) and he enjoyed it quite much.
Hopefully other can provide more info about the 2" EPs.
Good luck!
Mounts SW AZ GTI
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Barlow Baader Q-Barlow 2.25x / 1.3x
Eyepieces Baader Classic Orthos 6mm, 10mm, 18mm | Baader Classic Plössl 32mm | Maxvision 24 mm 68°| BST 5mm
Filters Baader Neodymium (Moon & Skyglow) | Astronomik UHC
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Re: Can't Decide 8SE or CPC 800 GPS SCT
∞ 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
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Re: Can't Decide 8SE or CPC 800 GPS SCT
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
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Re: Can't Decide 8SE or CPC 800 GPS SCT
Have you looked at this; https://www.highpointscientific.com/cel ... on-8-12091
-Jeff
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- Flyhigh7
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Re: Can't Decide 8SE or CPC 800 GPS SCT
Telescope: Celestron Evolution 9.25 with Celestron Motor Focus
Evolution WiFi Mount Head/ built in 10 Hr Battery and CPC Tripod
Binoculars: Celestron SkyMaster Giant 15x70 / Heavy Duty Tripod
Simmons 10x50
Camera: Canon Digital Rebel XT EOS 350D
Diagonal: Baader 2" BBHS Sitall Mirror
EPs: Baader Hyperion Aspheric 36mm 1.25"/2", Pentax XW 20mm, Pentax XW 7mm,
Tele Vue Delite 11mm, Plossl 40mm & 13mm
Barlow Lens: Tele Vue 2.5x - 1.25" Powermate
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Re: Can't Decide 8SE or CPC 800 GPS SCT
As for the mounts my biggest concern about fork mounts is that you are paying a big chunk of money for
Another scenario, you crack your
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
- gregl
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Re: Can't Decide 8SE or CPC 800 GPS SCT
One of the issues with the 8SE is the tripod, which is not all that sturdy. Someone gave me a much heavier tripod and I adapted the base of the SE mount to fit and it makes a big difference. Someone once suggested hanging a gallon jug of water under the stock tripod to help steady it.
As to the focusing, I put an oversize knob on mine, about 2 inches in diameter or so, and that helps a lot. Scopestuff sells them (http://scopestuff.com/#Machined%20Things) but I also seem to remember someone made one from a plastic jar lid or something like that. (I have machine tools so I make one from aluminum.)
So in the end, I'm keeping the SE; the issues with the mount aren't severe enough to upgrade and the focusing knob and heavy tripod make a significant difference.
As to eyepieces, you don't buy based on barrel diameter; you buy the eyepiece based on the focal length and the field of view, which, in turn, determines the barrel diameter.
Finally, for lots of good info on the NexStar scopes, see this site: https://www.nexstarsite.com
- Flyhigh7
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Re: Can't Decide 8SE or CPC 800 GPS SCT
I was leaning toward the CPC 800 until reading the points made by Bigzmey. I have also been looking at the
I almost talked myself into going 9.25 but I ran a few tests at the gym this morning to determine how easy lifting the extra weight will be and though I can lift it a few of you have made excellent points about why lighter is better as the heavier weight to lug around might keep the thing in storage.
I read a review of the Evolution that said it is not a good scope for astro-photography though it didn't say why so i find that hard to believe and though my primary use is NOT for photography though I eventually dabbled in it with the 6". I saw a UTUBE video of the Evolution 8 and it is very light and I love the build in battery.
So many options. And then there are the Dobsonians! Yikes. By time I pull the Trigger I'll be bald!
Telescope: Celestron Evolution 9.25 with Celestron Motor Focus
Evolution WiFi Mount Head/ built in 10 Hr Battery and CPC Tripod
Binoculars: Celestron SkyMaster Giant 15x70 / Heavy Duty Tripod
Simmons 10x50
Camera: Canon Digital Rebel XT EOS 350D
Diagonal: Baader 2" BBHS Sitall Mirror
EPs: Baader Hyperion Aspheric 36mm 1.25"/2", Pentax XW 20mm, Pentax XW 7mm,
Tele Vue Delite 11mm, Plossl 40mm & 13mm
Barlow Lens: Tele Vue 2.5x - 1.25" Powermate
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Re: Can't Decide 8SE or CPC 800 GPS SCT
My beloved Celestar finally gave up it's last ghost and had to fit it with radius blocks and dovetail.
The Evolution looks decent and has been on the market for a few years, any bugs should be out of it's soul by now
-Jeff
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Re: Can't Decide 8SE or CPC 800 GPS SCT
This is paralysis by analysis, we all been there.Flyhigh7 wrote: ↑Fri Feb 02, 2024 2:19 pm Bigzmey makes some excellent points that I need to consider as did gregl. The idea of a water jug to stabilize the 8SE mount is excellent. Just don't bump the jug or it will oscillate till you steady it.
I was leaning toward the CPC 800 until reading the points made by Bigzmey. I have also been looking at the
EQ mounting Advanced VX 8" EdgeHD and I do like the Evolution Series Scopes also. My 6 inch Reflector had an EQ mount and it was pretty stable though it didn't track perfectly over long periods.
I almost talked myself into going 9.25 but I ran a few tests at the gym this morning to determine how easy lifting the extra weight will be and though I can lift it a few of you have made excellent points about why lighter is better as the heavier weight to lug around might keep the thing in storage.
I read a review of the Evolution that said it is not a good scope for astro-photography though it didn't say why so i find that hard to believe and though my primary use is NOT for photography though I eventually dabbled in it with the 6". I saw a UTUBE video of the Evolution 8 and it is very light and I love the build in battery.
So many options. And then there are the Dobsonians! Yikes. By time I pull the Trigger I'll be bald!
It is not just the Evolution but generally AltAz mounts considered not as good for
I believe there is now software processing to account for that rotation, but still
I have both 8" and 9.25" SCTs. 9.25" is definitely substantially larger and heavier. Still, I can carry and lift either with comfort. One consideration is that because 9.25" is larger and heavier it requires different class of mounts to support it. So, there will be added cost and weight for heavier mount.
As for DOBs they are great for visual observing but even more limited for
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
- Flyhigh7
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Re: Can't Decide 8SE or CPC 800 GPS SCT
Kind of leaning now toward the Evolution 8. I like the internal Battery, Weight, simplicity, but I think I won't go for the Edge HD version instead using that money to buy a good 2" Diagonal, a 2 or 2.5X Barlow, and a few 2" eyepieces at each magnification extremes. So it's going to be up to Bigzmey to make a stronger case for the Edge HD optics as he knows the differences. I hate that Celestron's product Specs give the Standard Evolution and the Edge HD Evolution the same tube specs as far as light gathering capabilities. If the optics are better in the HD it should be a little brighter, though I know that the biggy about the Edge HD is the improvement at the edges of the view and that seems more important for
So new Question about accessories if I'm going to get the 2" Diagonal, should I go for a 1.25" or 2" Barlow considering I will more than likely purchase 2" eyepieces over the 1.25s. You guys have talked so highly of the 2" over the 1.25" views and I read that going 2" actually delivers more light thus more detail to the wider view. Sucks that Celestron doesn't offer an option that is 2" right out of the back with a few 2" eyepieces.
Soon I'll be looking for eye piece recommendations but I have seen those recommendations already on this great forum.
I hope to plan this out so what ever accessories I decide to purchase, I will purchase them the same day I buy the Scope.
You guys are great. Thanks!
Telescope: Celestron Evolution 9.25 with Celestron Motor Focus
Evolution WiFi Mount Head/ built in 10 Hr Battery and CPC Tripod
Binoculars: Celestron SkyMaster Giant 15x70 / Heavy Duty Tripod
Simmons 10x50
Camera: Canon Digital Rebel XT EOS 350D
Diagonal: Baader 2" BBHS Sitall Mirror
EPs: Baader Hyperion Aspheric 36mm 1.25"/2", Pentax XW 20mm, Pentax XW 7mm,
Tele Vue Delite 11mm, Plossl 40mm & 13mm
Barlow Lens: Tele Vue 2.5x - 1.25" Powermate
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Re: Can't Decide 8SE or CPC 800 GPS SCT
Evolution will come with 1.25" prism diagonal and a couple of EPs. Before dropping $$ on EPs, diagonal, etc (don't warry you will spend plenty eventually ) I suggest to start observing with starter EPs and see what you like and don't like. This will help you to make better decision for the upgrades.
Once you get to the point of selecting 2" diagonal don't go for
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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Re: Can't Decide 8SE or CPC 800 GPS SCT
Look for the class of mount like the Celestron CGX, or the iOptron HEQ45 or other similar mounts whose payload capacity is in the 40 pound category.
∞ 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
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- Flyhigh7
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Re: Can't Decide 8SE or CPC 800 GPS SCT
The Diagonals I considering is the 2" Baader BBAS Star Diagonal or the less expensive Celestron 93573 Dialectic 2" Diagonal as I believe both of these with fit directly into the back of the EV 8 though I'm just not sure yet if I'll have clearance with the mount if the tube is pointing straight up.
Good advice to wait and see what I like in eyepieces but I've done that about 40 years ago with a 6" Reflector and a big investment in good eyepieces. This time I was planning on going with the recommendations of you guys who have a ton more experience than I do with an 8" tube f10. I really just figure I need a good quality eyepieces with 1 for lowest mag, one for high mag as the EV comes with intermediate mags. Then get the same with wide angle and maybe a little different focal lengths. Then slowly decide on what others I may want to use.
So what do I want to use the scope for: Mostly visual. I won't get into
Thanks guys!
Telescope: Celestron Evolution 9.25 with Celestron Motor Focus
Evolution WiFi Mount Head/ built in 10 Hr Battery and CPC Tripod
Binoculars: Celestron SkyMaster Giant 15x70 / Heavy Duty Tripod
Simmons 10x50
Camera: Canon Digital Rebel XT EOS 350D
Diagonal: Baader 2" BBHS Sitall Mirror
EPs: Baader Hyperion Aspheric 36mm 1.25"/2", Pentax XW 20mm, Pentax XW 7mm,
Tele Vue Delite 11mm, Plossl 40mm & 13mm
Barlow Lens: Tele Vue 2.5x - 1.25" Powermate
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Re: Can't Decide 8SE or CPC 800 GPS SCT
When I have purchased my 8"
Unfortunately, I don't have hands-on experience with Evolution mount.
2" Baader BBHS Star Diagonal is a great diagonal. I use it on my SCTs. I went through several diagonals on my 8"
To attach it to the telescope I recommend
Baader 2"
https://agenaastro.com/baader-2-sct-cli ... hread.html
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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Re: Can't Decide 8SE or CPC 800 GPS SCT
Telescope: Celestron Evolution 9.25 with Celestron Motor Focus
Evolution WiFi Mount Head/ built in 10 Hr Battery and CPC Tripod
Binoculars: Celestron SkyMaster Giant 15x70 / Heavy Duty Tripod
Simmons 10x50
Camera: Canon Digital Rebel XT EOS 350D
Diagonal: Baader 2" BBHS Sitall Mirror
EPs: Baader Hyperion Aspheric 36mm 1.25"/2", Pentax XW 20mm, Pentax XW 7mm,
Tele Vue Delite 11mm, Plossl 40mm & 13mm
Barlow Lens: Tele Vue 2.5x - 1.25" Powermate
Filters: Baader Planetarium Neodymium Moon & Skyglow Filter
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Re: Can't Decide 8SE or CPC 800 GPS SCT
It's a simple ratio of the area of each mirror. You don't have to go the fullI used to have a 6" Reflector so I wonder how much more light will an 8" collect than the 6". Wonder if there is a formula for that.
8 * 8 = 64
6* 6 = 36
64 ÷ 36 = 1.77
So the C8 collects 77% more light than your 6" newt. This may seem like a lot but it isn't.
1. One stellar magnitude is 2.512 so this represents less than one stellar magnitude gain.
2. However, you also lose a little bit of light through the front corrector
3. The central obstruction is bigger in an
The formula doesn't take account of the transmission loss and the central obstructions.
So you may not notice much difference between your 6" Newt and the 8"
If you are looking for a noticeable increase in light grasp over a 6" and you can afford it, and carry the weight, go for a C11 or Meade 10" or a 10" or 12" collapsable Flex
Another important point is that observing under a dark sky is worth more than
Photographic mode: the reducer screws directly to the rear thread. I believe that visual back on anThanks Bigzmey. I read that the Baader BBAS connects directly to the back of the OTA so would I still need the visual back? And just to show you how dumb I can be, exactly what is the visual back? Don't believe I had one on the 6" Reflector
Joe
Amateur astronomer since 1978...................Web site : http://joe-cali.com/
Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80.
Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's.
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Re: Can't Decide 8SE or CPC 800 GPS SCT
The more common way to attach the diagonal is the visual back. This is adapter which is threaded to connect to the baffle, and has a standard 1.25" or 2" holder on the other end to accommodate nose of diagonal. It makes changing or adjusting diagonal much easier.
I have tried both ways and recommend to use the visual back.
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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Re: Can't Decide 8SE or CPC 800 GPS SCT
I respectively disagree. I typically deploy 6" refractor (which does not have the central obstruction and in theory should collect more light than a 6" newt) and 8"OzEclipse wrote: ↑Fri Feb 02, 2024 10:48 pm So you may not notice much difference between your 6" Newt and the 8" SCT.
If you are looking for a noticeable increase in light grasp over a 6" and you can afford it, and carry the weight, go for a C11 or Meade 10" or a 10" or 12" collapsable Flex dob, and you will really see a big difference in light grasp.
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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