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tony_cameraguru

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  • Gender
    Male
  • Interests
    Photography - Astrophotography
  • Location
    Kent UK

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  1. Hi Everybody Firstly thank you all for the contribution's you have made to my Teardrop star issue. Last night the tracking was around 0.7 too 0.9, which I left running for some 20mins and subs were no different as before. I also tried two different field flatteners and the result was the same. I tried varying the back-focus and no change, I even changed the 2in to a 1.25in configuration - no change. I recently had the telescope checked and adjusted for collimation, and it has worked fine up until some weeks ago. During focusing last night I saw that out of focus the stars were perfectly round. I will change the guide speed in Ascom as that is what I use, and change it in PHD2 as well. However no clear night tonight so patience is key now🥵. Tony
  2. Thank you Michael. When I did the tracking calibration RA showed as up and down. How do I adjust the guide rate to get that increase in guide speed Michael? Tony
  3. Equipment: EQ6R-Pro; Explore Scientific 80ED Triplet; ZWO ASI120MC guide camera; Canon 250D imaging camera; OVL field flattener. Software: NINA; PHD2 (multistar). I cannot solve this issue with the stars in my images. It started some weeks ago, and basically I am not able to image at all. Image 1 shows a 10sec exposure on the star Sirius, with the teardrop shaped stars around. Image 2 shows 120sec exposure on NGC7522, same night, same setup, again teardrop stars. On both images you can see the tracking is lower than 1, and on a windy night. Both images here show the exact same type of distortion to the stars. I did try a 240sec exposure and that was the same. Image 3 shows PHD2 on Sirius, changing any of the settings doesn't work. This was after a new calibration was carried out, which was very good (see image 4). Any ideas please? Tony
  4. I seem to be getting these vector flares on some of the brighter stars, any ideas please? Explore Scientific 80ED FCD; 1.25 L'Extreme filter; Canon 250D modded; 1.25 filter wheel; OVL Field Flattener. I have tried with and without a filter, also with and without the filter wheel. I have just had the scope collimated as well by an astronomy store in the UK. I include two images, a single sub and a 62 sub stacked and initial stretch. Thanks Tony
  5. My equipment consists of: Explorer Scientific 80ED 480mm - Canon 250D astro modded - Field Flattener - UHC filter. The sub shows a close-up of a star, and the reddish hue on the right side that seems to be a common effect on my imagery. This particular star is near the centre of the sub. Can anyone assist me in analysing what may be wrong please? Thank you. Tony
  6. I think I have tracked the problem down, as the flattener comes in two parts. the correcting lens and the sleeve. I took them apart some time ago to easily clean the lens, and I screwed them together wrongly. The screw end is reflective silver and the opposite end is black, I replaced the sleeve the wrong way round so the reflective end was open to the imaging train. Hope this works now, but cloudy skies at the moment. Thank you to all for helping me with this issue. Clear Skies
  7. Hi Despite imaging M42 on separate nights, and in two different locations in my rear garden, I am still getting these strange semi-circles on every light sub and in the exact same areas.The view is clear of any obstructions, and both nights were clear. This occurrence does not affect any other light subs, and I collected data on M45 the same nights. I have not seen this on any other DSO images that I have shot. Equipment: Explore Scientific 80ED APO Triplet; Explore Scientific Field Flattener; Canon 250D mod; UHC filter. Will this phenomena clear during stacking with darks etc in APP? Thanks
  8. Hi all I have been imaging M45 and have come up with this form of issue with the stars. It almost looks like I have left (and I did think this) the Bahtinov mask on, however I didn't. This is not the first time I have noticed this star issue. Any ideas? This is my equipment: Explore Scientific 80ED Apo Triplet; Explore Scientific Field Flattener; Canon 250D mod; 2in UHC filter; 60mm Guidescope; ZWO ASI120MC-S.
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