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Hi All, wondered if you could help me make sense of this ... new HEQ5 - belt modded by FLO, all feels good, minuscule backlash but strange guiding.
Admittedly first time using it but baffled.
Failed calibration see image below and guiding seemed to be Ra and Dec following each other.
Stars look ok ish (@ 1500 mm )
Needle galaxy is poor as only about 10 mins each in RGB
note - it was hazy and did keep losing star in OAG
Thanks for looking
I recently scored a great deal on facebook marketplace and bought Skywatcher Skymax 180 mm Maksutov-Cassegrain Telescope (f/15) with EQ6R-pro mount. I understand that long focal length telescopes are more suitable for planetary imaging. However, as I am tight on budget, I would like to use the same scope for deep-sky astrophotography. I have Canon Rebel T5 DSLR camera that I am using for taking images. Without autoguiding and a decent polar alignment, I can get ~30 seconds long shots without any star trailing, but that's not sufficient for imaging objects like M51. I would like to be able to integrate longer, say few minutes, thus would like to purchase an autoguider. Here are some specific questions I have.
1). The telescope comes with an 8 x 50 straight-through finder. If I were to use it as a guidescope, what type of image integration time can I expect? Has anyone done autoguiding for f/15 scope with an 8x50 or other finderscopes?
2). If the integration time will be an issue with the 8x50 finder scope, I am open to purchasing an off-axis-guider. However, considering the narrow field-of-view of Mak-180 telescope, I am concerned about not having enough photons from guidestar for autoguiding. For instance, with my DSLR camera, I need to integrate 20-30 seconds to see the nearby stars in M51. What type of OAG and camera would I need to autoguide with my scope? Are there affordable cameras (~$200) that would do the job for me? Would ASI120MM Mini Monochrome (~$150) do the job? What about OAG?
I plan to use phd2 software for autoguiding rather than relying on the build-in guide port on the mount. Instead of integrating for hours, I am planning to do DSS stacking of few mintues long multiple shots, hopefully this will put less strict requirements on the autoguider.
In case this information is relevant: with my current setup, I have no issue pointing my scope to a desired deep-sky object, track the object within the field-of-view of my DSLR camera for hours using the mechnical tracking of the EQ6 mount. For instance following is a single raw image of Ring nebula taken with 30 seconds shot. But it is not enough for generating high-quality images.
Thank you in advance for your help.
I'm selling a 1 year old Moravian G3-16200M Mark II camera. Please note this is the newer Mark II camera with faster downloads (on my NUC computer it was 9s.). Everything is in like new condition.
The Moravian G3-16200M MKII has a class 2 chip and the standard cooling. The camera cames with an M48 nose piece (unused), power supply with both USA and European plug, 10ft USB cable and hard case. There is also a 17mm extension that can be used if you purchase separately the larger M68 adapter. There are currently 2 read out lines that completely disappear with active cooling and proper image calibration, as is typical with a class 2 sensor.
£2240 PLUS SHIPPING, no fee for paypal. NOTE: ships from USA.