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Ovi

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    Timisoara, Romania

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  1. Hello! I have noticed while shooting that the left and right side have pretty bad aberrations (even worse in the corners). My setup is: SW 72ED, StellaMira 0.8x FF/FR, T-ring, Canon 60D. Here's a sub I took a few nights ago: L_0006_NGC6992_23-08-08__22C_ISO800_300s.CR2 Here's a mosaic done with the aberration inspector in PI: And here are some screenshots from CCDInspector. I have no idea what they mean but maybe it helps I'd appreciate it a lot if someone here could help me diagnose the issue present here. My biggest fear is that this is caused by bad sensor alignment from when I astromodded my camera .
  2. This sounds interesting. See you all in a year.
  3. Hello! Yesterday I shot a bunch of exposures of the Rosette. The lens I'm using unfortunately has problems with focusing all wavelengths at the same plane. As such, while the G and B channels are focused, the R one is very unfocused. This leads to red halos around most medium-brightness stars (and probably loss of detail). How do I go about removing the red halos? I have access to PixInsight, Photoshop and Lightroom. Thanks! I have attached below an rgb image and one only with the red channel.
  4. Sorry for not writing this in the original post. I have a Canon 60D so afaik M42 lenses will focus to infinity on my camera.
  5. Hello! I am looking for recommendations for a 135mm lens for 100-150$ (preferably even less). I currently have a Nikon 135mm f/2.8 pre-AI, which turned out to offer quite a disappointing performance, producing red halos around all moderately bright stars and having visible coma in all parts of the image, save for the centre 1/3rd (1/9th by area actually). It is a good lens for daytime photography but it falls short when doing astrophotography. I am currently looking at the SMC Takumar 135mm f/3.5 (the 2.5 is a bit outside my budget and I would've used it stopped down to f/3.5 anyway). If anyone here has used a vintage 135mm lens before for astrophotography please share your experience. Thanks! PS: Here's a link to an unprocessed image of the Rosette I took with my Nikon lens at f/3.5: https://drive.google.com/file/d/1Y_aFcmDTh1BWf4k1yo83Qe61-Xi236iY/view?usp=sharing
  6. Unmodded DSLR block around 75% of Ha signal IIRC so it wouldn't really make sense to use an Ha filter with one.
  7. What dual bandpass filter would you recommend?
  8. Hello! I have a modified Canon 60D, Nikkor 135mm f/2.8 lens and Omegon MiniTrack LX2 tracker. Would 1 min long exposures (the limit with my mount) be enough to collect meaningful Ha data? Thanks!
  9. Most sites I've seen are based in the US and the import taxes are as expensive as the blank itself. Thanks in advance!
  10. Maybe it's this one: http://astronomy.tools/calculators/field_of_view/
  11. On the morning of the March 18th the Moon, Mars, Jupiter and Saturn will be seen close to each other. Hopefully the weather will be good
  12. I bought a 9x50 Right Angle Sky-Watcher finder, an RA motor and a Seben 9-24mm eyepiece. Unfortunately the motor wasn't in stock and I'll have to wait something like 2 more weeks. (a somewhat late) Merry Christmas to you all!
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