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By Geordie mc
Skywatcher illuminated reticule eyepiece. It has a red crosshair pattern. I think it’s 24mm rather than the newer 12.5mm models. Great condition. Looking for £35 including postage from France. Thanks.
After some trial and error I'm getting some very good guiding results with PHD2 now. 60mm guidescope and ASI290MM mini camera. The M42 image taken late March was 12 x 15 second exposures taken manually with my dslr / C8 and a stopwatch. Stacked in DSS and played with a bit in GIMP. On the night I couldn't get APT to register the camera - turned out to be the mini USB cable (although later trials point to the socket in the camera being a bit loose too).
Bought an iOPTRON iPOLAR that arrived on Friday and had a play with that which has resulted in near perfect polar alignment. 2 star alignment and an additional 2 calibration stars on my Advanced GT mount means I'm getting very accurate GOTOs now and PHD2 (through the ST4 port on the ASI camera) seems to be guiding very well. Last night after more cable faffing I managed to get everything working together to the point where I felt confident enough to leave it running by itself for an hour and a half (45 minutes of 180 second exposures plus 3 minutes each exposure to save the file - I've since found out I shouldn't have noise reduction switched on in the camera - DOH!) so M51 is 15 x 180 second @ ISO 800 lights and 5 x 180 second darks. A little manipulation in GIMP and I think it's come out very well. Obviously still have a lot to learn and I'm going to have to start taking much longer exposures but I'm quite pleased with these 2 pictures.
I am currently researching which setup to purchase as my first proper scope (once they are back in stock).
I thought I had settled on the Skywatcher Explorer 130ps AZ GTi but then I saw the Skywatcher Star Discovery 150i for just a little more money.
Could anyone please tell me the difference between the 2 OTA's (other than the different aperture size), and also the difference between the 2 mounts?
I realise that the AZ GTi can be modified to run in EQ mode whereas the Star Discovery can't.
Can the Star Discovery view all the way to the zenith or does the OTA catch the mount or tripod before it gets there?
this image is my 1st light using my recently acquired iOptron Photron RC6 , never used an RC before, anyway after quite a bit of trial and error figuring out which adapters were required in order to achieve focus with the Canon 600d and then getting it balanced ( quite back end heavy with the extension tubes and camera on ) it was time to put myself to the test as well as the kit.
It ended up just being a short run . the set up consisted of :
EQ6 Pro pier mounted
Canon 600d (modified)
ASIAir Pro (for the wizardry stuff)
ASI 120mm Mini guide camera mounted to 9 x 50 finder scope
20 x 120 sec lights. or ( 40 minutes in old money )
Calibration files were also used ( not to good effect i might add )
Stacked in DSS with slight adjustments then transferred to Photo shop for final butchery,
Levels and curves adjusted and cropped slightly.
Overall i'm quite happy with the outcome for such a short amount of data,
Any feedback is welcome, or any tips to help me improve with this scope 🙂
so here it is
The integration time on this image has now reached 6hrs 10mins, and probably the final sub count.
This one has been processed entirely in PI using a luminace mask to help control both the background and foreground areas.
Total subs: 37 all 600secs durations
Scope: RASA 8
Mount iOptron CEM60 Standard
Camera: SAi 533 Pro, Cooled OSC
Filters: Baader UV/IR Cut (luminance filter) and an IDAS NBZ (multiband for OSC)
Guiding TS 80mm guider with ASi120mm camera and PHD2 (Rev4?)
Capture and scope control: SG Pro