Actually an autoguider is very helpful for identifying hardware problems. Namely, through the error graph. It shows periodic behavior, how muchturboscrew wrote: ↑Sat Jul 24, 2021 10:06 amI'm not sure if I got the mount problems fixed. I haven't got a chance to try it, because, when I got the tweaking done, it was already summer = warm and light nights.OzEclipse wrote: ↑Sat Jul 24, 2021 3:18 am Some good advice here. Your 120 mount is supposed to have a very low PE (3"?). I know you had some teething problems. If the mount is now working well and you want to start with shorter exposures of brighter objects, I suggest you buy the primary camera only. Try some lucky imaging without any autoguider, repeated short exposures, throw out any bad ones.
Examine the errors you are getting. Try to decide between drive precision and flexure. You may need to use an off axis guider or you may be able to use a guide scope. I would get the main camera first and investigate the mount's performance before deciding whether to go with off axis guiding or a guidescope.
Another approach is to buy a cheap guide camera (ASI120 or QHY5-ii) first but no guide scope. Use that to test the AP performance of the OTA, focuser accuracy, and the mount drive precision before investing a lot of money into a dedicated astro camera.
Cheers
Joe
Maybe I'll get a main camera first, and see where that takes me.
AP gear (for the future)?
- SkyHiker
- Articles: 0
- Posts: 2293
- Joined: Sat May 11, 2019 8:40 pm
- 5
- Location: Santa Barbara, CA
- Status:
Offline
-
TSS Photo of the Day
TSS Awards Badges
Re: AP gear (for the future)?
- OzEclipse
- Moderator
- Articles: 2
- Posts: 2439
- Joined: Sat May 11, 2019 8:11 am
- 5
- Location: Young, NSW, Australia, 34S, 148E
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
This photo shows such a picture from my EM-200 and iOptron iEQ45 mounts. The image scale is 3" per pixel. At this scale, the EM 200 is hard to pick, maybe 6" but I need to do it with a much longer
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.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
- JayTee
- Co-Administrator
- Articles: 2
- Posts: 5657
- Joined: Thu Apr 25, 2019 3:23 am
- 5
- Location: Idaho, USA
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
That’s an interesting exercise worthy of future experimentation. Thanks for sharing.
Cheers
∞ 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."
- OzEclipse
- Moderator
- Articles: 2
- Posts: 2439
- Joined: Sat May 11, 2019 8:11 am
- 5
- Location: Young, NSW, Australia, 34S, 148E
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
Hi JayTee,
This method was discovered by "accident" in 1996. I was out photographing comet Hyakutake on film, with extended exposures. The comet was moving relative to background stars and so I was manually tracking on the head in
Fast forward 25 years. A friend bought a new Losmandy G11 on my recommendation for a good heavy duty accurate astrophotography mount in a certain budget. Early this year, he thinks he is having PE problems- eggy stars but he only has a
Last month, I'm writing workshop notes on tracked astrophotography for a three night live-in workshop on using motorised trackers. I tested my own mounts to illustrate the method that people who only have a small tracker and a
If cloud ever clears and it stops raining, I'm going to repeat the EM200 at an 1800mm focal length. The EM200 track shifts +/- 1 px from one line of pixels so it could be 6" or 9". Needs that longer
Cheers
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.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
If I might, later on, go with more "colourwise accurate" imaging, that works with filter wheel and mono camera?
If so, then, would it be better idea to get a cheaper colour camera first, to learn the basics?
Then upgrading wouldn't hurt that much (financially).
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- sdbodin Online
- Articles: 0
- Posts: 1106
- Joined: Sat May 11, 2019 11:00 pm
- 5
- Location: Mattawa, WA, USA
- Status:
Online
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
Exactly the route I took. Everybody needs a goodturboscrew wrote: ↑Wed Jul 28, 2021 1:46 pm Hm, I'm getting into "evatulation"-mode again (acting in quite indecisive manner).
If I might, later on, go with more "colourwise accurate" imaging, that works with filter wheel and mono camera?
If so, then, would it be better idea to get a cheaper colour camera first, to learn the basics?
Then upgrading wouldn't hurt that much (financially).
Actually,
Steve
Cameras; Atik 460ex mono, Zwo ASI1600MC-cool, QHY5L-II color and mono
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
How to get the "scientific" colours with a colour camera? I thought that you usesdbodin wrote: ↑Wed Jul 28, 2021 8:24 pmExactly the route I took. Everybody needs a goodturboscrew wrote: ↑Wed Jul 28, 2021 1:46 pm Hm, I'm getting into "evatulation"-mode again (acting in quite indecisive manner).
If I might, later on, go with more "colourwise accurate" imaging, that works with filter wheel and mono camera?
If so, then, would it be better idea to get a cheaper colour camera first, to learn the basics?
Then upgrading wouldn't hurt that much (financially).OSC camera for those quick shots, like a comet and an eclipse, either kind. Or just between weather fronts to get a conjunction wide field, or the moon hovering near the horizon. Color cameras are very useful.
Actually,OSC cameras are getting so good that mono might just fade away into history.
Steve
That also makes false colours easier. (I guess you do that usually with SII?)
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- OzEclipse
- Moderator
- Articles: 2
- Posts: 2439
- Joined: Sat May 11, 2019 8:11 am
- 5
- Location: Young, NSW, Australia, 34S, 148E
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
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.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
- sdbodin Online
- Articles: 0
- Posts: 1106
- Joined: Sat May 11, 2019 11:00 pm
- 5
- Location: Mattawa, WA, USA
- Status:
Online
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
I shootturboscrew wrote: ↑Wed Jul 28, 2021 9:07 pm
How to get the "scientific" colours with a colour camera? I thought that you use HA, OIII and SII filters for that.
That also makes false colours easier. (I guess you do that usually with SII?)
Above,
Good luck in your quest and research, spend time not money,
Steve
Cameras; Atik 460ex mono, Zwo ASI1600MC-cool, QHY5L-II color and mono
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
Aahh, THAT explains...sdbodin wrote: ↑Wed Jul 28, 2021 11:39 pmI shootturboscrew wrote: ↑Wed Jul 28, 2021 9:07 pm
How to get the "scientific" colours with a colour camera? I thought that you use HA, OIII and SII filters for that.
That also makes false colours easier. (I guess you do that usually with SII?)HA and OIII narrow band filters very successfully with my ASI1600MCOSC camera, I don't have an SII. But, I convert the output to mono and then re-color with my own preference. For Hydrogen, the Balmer series, I use the following 100% red, 20% green, 40% blue, for the 'forbidden' Oxygen I use 50% green, 50% blue and zero red.
Above,OSC thenOSC plusHa overlay as described above.
Good luck in your quest and research, spend time not money,
Steve
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
https://www.astroshop.eu/astronomical-c ... r_1_select
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- OzEclipse
- Moderator
- Articles: 2
- Posts: 2439
- Joined: Sat May 11, 2019 8:11 am
- 5
- Location: Young, NSW, Australia, 34S, 148E
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
It depends what you want to photograph?
At prime focus of your VX12, it's field is 37x54 minutes and each pixel is sampling 0.8"
Cooling is less of an issue for you since you can't photograph during summer and winter is, well, cold in the land of santa claus
Think about what you want to shoot and whether tis will do it?
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.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
What I want to shoot? Like any total beginner: everything.OzEclipse wrote: ↑Thu Jul 29, 2021 8:28 am Nobody can answer that.
It depends what you want to photograph?
At prime focus of your VX12, it's field is 37x54 minutes and each pixel is sampling 0.8"
Cooling is less of an issue for you since you can't photograph during summer and winter is, well, cold in the land of santa claus
Think about what you want to shoot and whether tis will do it?
Joe
(I guess deep sky and planets.)
But I don't even know the size of the primary focus image (sensor size).
And I don't know how to tell what a camera can do. I have no idea about the criteria.
And yes, if the temperature is above 15°C, it'll be too bright. When it's dark enough, the temperature is usually between -10°C and 10°C. If it's colder, I the temperature limits the use of the gear - including the mount.
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- OzEclipse
- Moderator
- Articles: 2
- Posts: 2439
- Joined: Sat May 11, 2019 8:11 am
- 5
- Location: Young, NSW, Australia, 34S, 148E
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
The sensor is 13x19mm and the pixel size is 4.7 micron.
At prime focus of your VX12, focal length 1200mm, the field of view of the sensor is 37x54 minutes and each pixel is sampling 0.8"
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.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
https://agenaastro.com/articles/guides/ ... guide.html
I think I'm starting to understand.
Is it so, that for "magnification" you use barlows/reducers, like eyepieces in visual?
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- OzEclipse
- Moderator
- Articles: 2
- Posts: 2439
- Joined: Sat May 11, 2019 8:11 am
- 5
- Location: Young, NSW, Australia, 34S, 148E
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: AP gear (for the future)?
For deep sky photography, most people don't use barlows. Everything at the prime focus or behind a
I'm not a planetary photographer so this is only based on what I have read not personal experience.
I believe that planet photographers mostly use Televue Powermates to extend the focal length of their instruments to several metres.
Example : On your scope with a 4x powermate you will have 4800mm focal length the discs of Jupiter and Saturn.
Jupiter 50". Image size = Focal length x planet diameter (radians) = 4800 x 50/206265 = 1.16mm about 250 pixels on the 294
Saturn 20" Image size = Focal length x planet diameter (radians) = 4800 x 20/206265 = 0.46mm about 99 pixels on the 294
Each 4.7 micron pixel is sampling 0.2 arc seconds. If your seeing is as bad as you say, then this might be overkill. Generally, planet photographers aim for cameras with tiny pixels and very small sensors capable of very high frame rates. The opposite of what you want for deep sky, a big sensor, cooled and low noise giving the capacity for longer exposures.
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.
Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12
Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec.
Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari
Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
-
- Articles: 0
- Posts: 143
- Joined: Thu Apr 25, 2019 9:29 am
- 5
- Status:
Offline
Re: AP gear (for the future)?
I'm not saying that you should not guide. Just that you don't have to do so. There are advantages and disadvantages to both approaches. And if you try doing
When I was starting
One other thing, however? While there's absolutely nothing wrong with doing
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
Thanks, I'm gradually getting the idea. I was wondering about the planets...OzEclipse wrote: ↑Thu Jul 29, 2021 11:41 pm Turboscrew
For deep sky photography, most people don't use barlows. Everything at the prime focus or behind a coma corrector in a Newt, Field flattener reducer in a refractor or SCT.
I'm not a planetary photographer so this is only based on what I have read not personal experience.
I believe that planet photographers mostly use Televue Powermates to extend the focal length of their instruments to several metres.
Example : On your scope with a 4x powermate you will have 4800mm focal length the discs of Jupiter and Saturn.
Jupiter 50". Image size = Focal length x planet diameter (radians) = 4800 x 50/206265 = 1.16mm about 250 pixels on the 294
Saturn 20" Image size = Focal length x planet diameter (radians) = 4800 x 20/206265 = 0.46mm about 99 pixels on the 294
Each 4.7 micron pixel is sampling 0.2 arc seconds. If your seeing is as bad as you say, then this might be overkill. Generally, planet photographers aim for cameras with tiny pixels and very small sensors capable of very high frame rates. The opposite of what you want for deep sky, a big sensor, cooled and low noise giving the capacity for longer exposures.
Joe
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- turboscrew
- Articles: 0
- Posts: 3233
- Joined: Sat Jun 20, 2020 9:22 am
- 3
- Location: Nokia, Finland
- Status:
Offline
-
TSS Awards Badges
Re: AP gear (for the future)?
Thanks. @SkyHiker also suggested trying without guiding first.OleCuss wrote: ↑Fri Jul 30, 2021 12:21 am You don't necessarily have to guide at all. Keep your subs short and do a bunch of them. Stack 'em and process (takes longer than if you have just a few subs). Tracking errors will lose you a little of your FOV in the final image but that may be an acceptable trade-off.
I'm not saying that you should not guide. Just that you don't have to do so. There are advantages and disadvantages to both approaches. And if you try doing AP and are happy without guiding then you don't need to pay the extra to do that. If you are unhappy with un-guided AP you then add the guider.
When I was starting AP I was persuaded that I had to do the guiding and got a system for that. I went over setting it all up and decided that I just didn't want to deal with the complexity and never did use a guide system. I did some decent work without a guide system. Figured out that I just don't like doing AP (didn't want my astronomy time to be a technical exercise and I hated the processing) - and quit doing that so maybe I just don't have the right perspective anyway. . .
One other thing, however? While there's absolutely nothing wrong with doing AP with a focal length of 1200mm, it can be a whole lot more frustrating than is imaging at a focal length of maybe 600mm or less. You've got great gear for the try, but I was never quite so brave as to try anything like that.
And yes, I did some rough calculations, and realized that my focal length gives quite some restrictions.
When it comes to frustrations, I'm an embedded
Senior Embedded SW Designer
Telescope: OrionOptics XV12, Mount: CEM120, Tri-pier 360 and alternative dobson mount.
Grab 'n go: Omegon AC 102/660 on AZ-3 mount
Eyepieces: 26 mm Omegon SWAN 70°, 15 mm TV Plössl, 12.5 mm Baader Morpheus, 10 mm TV Delos, 6 mm Baader Classic Ortho, 5 mm TV DeLite, 4 mm and 3 mm TV Radians
Cameras: ZWO ASI 294MM Pro, Omegon veLOX 178C
OAG: TS-Optics TSOAG09, ZWO EFW 7 x 36 mm, ZWO filter sets: LRGB and Ha/OIII/SII
Explore Scientific HR 2" coma corrector, Meade x3 1.25" Barlow, TV PowerMate 4x 2"
Some filters (#80A, ND-96, ND-09, Astronomik UHC)
Laptop: Acer Enduro Urban N3 semi-rugged, Windows 11
LAT 61° 28' 10.9" N, Bortle 5
I don't suffer from insanity. I'm enjoying every minute of it.
- SkyHiker
- Articles: 0
- Posts: 2293
- Joined: Sat May 11, 2019 8:40 pm
- 5
- Location: Santa Barbara, CA
- Status:
Offline
-
TSS Photo of the Day
TSS Awards Badges
Re: AP gear (for the future)?
I can set everything up quickly thanks to the Medusa and Ekos provides everything I need. Again for a
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