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About tomato

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  1. Magnificent image indeed, as is Steve's. Were you selective regarding seeing conditions for this project or do you generally always have good enough conditions in Spain to image at this arcsec/pixel resolution?
  2. This was an interesting talk and I for one can’t disagree with the scientific principles that sit behind Robin’s conclusions. However, before committing to another camera purchase (and I am quite happy to make the £1000+ saving by buying CMOS), I would like to personally demonstrate this with some actual images, I’m currently trying to experiment with an ASI 120 on galaxy targets, but the UK weather is not co-operating. One thing is certain, if it’s cloudy, you don’t need to calculate any kind of exposure time...
  3. Great image, nice subtle detail and colour.
  4. Another exquisitely detailed image. At 0.75 arcsec/pixel, do you also get a frequent stable atmosphere at e-Eye, as well as the clear skies? Thanks for the heads up on the LRGB tutorials, something for me to study in earnest, while I wait for the clouds to move on.
  5. Yes, thanks very much for posting this, after seeing Robin's presentation I was looking to see if I could find the content on-line. I have been trying to absorb the theory on the SharpCap forum, but it is really useful to be able to go through the presentation again.
  6. Hmm, that’s a tough one, the DSLR image was lots of short exposures (no guiding back then) but the integration time was less than the OSC image. The mono with filters was longer, 3.3 hrs of data, so it is not a fair comparison. My point was I don’t think I could have achieved the OSC result with the DSLR with the same amount of effort and ability, and I don’t think the OSC camera could deliver the mono+filters result, no matter how hard I tried, imaging from the same location. I don’t mean to belittle what can be achieved with DSLRs, the myriad of superb images produced with those cameras is testament to that, I just think you will get better results with dedicated AP cameras, all other things being equal.
  7. That’s a brilliant image of M33, my image is certainly not indicative of what can be achieved with a DSLR and I’m sure I could have got something better if I had persevered with it. However, moving to the cooled OSC gave me a step change in what I could capture, with only the same level of skill and effort put into the imaging and processing, and those results gave me the incentive to progress further in this hobby. I think we are fortunate that the advent of CMOS technology in AP is making dedicated Astro imaging cameras available at affordable prices.
  8. Superb image of this region. Has anybody ever had the nerve to post a shot of B33 upside down? Is it the only DSO that has a ‘right way up’?
  9. AP is challenging enough with all the right equipment, but having a sensitive camera helps a lot. I started out with a high end mount and decent refractor with a DSLR then moved to a OSC CCD then finally mono and filters. Here are the 3 images of M33 I managed with each of these set ups, sure my knowledge and technique have improved also, but I think they illustrate the point.
  10. Get all the comms stuff up and working in the daylight when the rain is lashing down. Your scope, camera and mount don’t know if you are imaging clouds of gas and dust light years away or the satellite dish down the road.
  11. I’m currently experimenting with an ASI 120 MM on the Esprit 150, with a view to acquiring an ASI 178 or 183 for galaxy imaging as opposed to the Atik 460 or similar. As usual, some clear, moonless darkness would be nice. Olly, It’s by no means a scientific survey but I noted with interest that truss tube RCs were very thin on the ground at the Practical Astronomy show last weekend, while larger refractors were in abundance. This was in stark contrast to 4 years ago when RCs were on prominent display at the IAS. I am also sensing a shift in the established thinking.
  12. That's a nice image, as you say plenty of detail for 45 mins, can I ask what calibration frames were used on the image? I'm very interested in galaxy shots taken with CMOS cameras, as I am trying to decide for my specific camera purchase on whether to go this route or stick with tried and trusted CCD technology, albeit at near double the outlay. I must admit there are more and more very fine images being posted using the CMOS cameras.
  13. I agree, the advent of on-line shopping has all but killed the show discount. The talks were brilliant, I do sympathise with those who travelled a distance and couldn’t get a ticket. My previous show was the IAS in 2014, I was fascinated to see how trends how shifted. At that show nearly every telescope vendor had a RC truss tube in pride of place on a mount, yesterday, apart from Peter Shah’s beautiful example they were almost nowhere to be seen, I eventually found two unloved and unmounted items tucked away next to the scope bags. It really was Refractor City, forums like SGL really do carry some clout.
  14. Well, in my humble opinion, Barry’s version is equally worthy of an APOD, the colour, the depth, the clarity....
  15. Wonderful image, brilliant application of technology and technique.
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