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Found 9 results

  1. I thought my eyepiece collection was complete until I bought my "last ever" telescope. This operates at a native F8 and is just over 3250mm fl. I have the longer Naglers, 31, 26, 22, 17 etc and 35mm, 27mm Panoptics. I was always a little disappointed with the kidney-beaning in the Naglers in other telescopes, though they were overall better than any other eyepiece I have used, but in this one they seem to be affected less and even the 26mm is now a keeper. Before I got the Naglers (over many years all s/h) I had 35, 27 and 19 Panoptics. These were my favorite eyepieces until the Naglers came along. I kept the 35mm as stars seemed a little sharper in the inner 50 degrees than the Naglers, but trailed off in the outer regions and the 27mm as it really is an exceptional eyepiece. In any case I often wanted to darken the sky with higher magnification so the longest ones were primarily used for sweeping and finding. Given sky brightness is becoming more of an issue I thought I would never need a longer focal length. Now the Naglers seem sharper over the entire view and with the higher magnification of a longer scope the sky is darker and I hanker after the widest possible field. The issue is that the 82 degree 31mm Nagler gives me a true fov of 0.78 degrees and the 35 mm Panoptic 0.73 degrees. There is noticeably more sky in the 31mm Nagler. A 41mm Panoptic will yield 0.85 degrees, an improvement of nearly 10% over the Nagler 31. As I can readily see the difference in the amount of sky covered by the 31mm Nagler and the 35mm Panoptic I believe the time to look at a 41mm Panoptic is here. Before going into a debate on whether ES eyepieces could fill the slot all I can say is that having been able to compare my old Naglers with new 82 degree ES ones in my scopes I and convinced that, for me, there is a small improvement with the Naglers at the outer regions of the field and so I am minded to discount them. They are fantastic value and I won't deny they are very good eyepieces. The 41mm Panoptic would seem fit the bill for this long fl scope though I suspect it would be a disaster in a fast Newtonian, which I also have. My quest is to find someone willing to part with theirs and/or suggestions of an alternative that someone has used in practice. Thankyou for reading Ian B
  2. Hello everyone, Last wednesday, I tried my first shot with an Astrotrac, which I borrowed from a friend before making the jump and buy one. And I must say that I'm quite amazed by its tracking capabilities, even without an autoguider. I know that the lens I used has only 85mm of focal length, but I only got a 5 pixels drift during 45 minutes of imaging : that's quite impressive Enough chitchat, here are the images : 5DmkII, Astrotrac, 85mm f/4.0, ISO 800, 14 x 60 seconds exposures, 15 darks, 50 bias, no flats, PixInsight for everything except the colors/saturation. From the Southern Cross to Eta Carina 5DmkII, Astrotrac, 85mm f/2.8, ISO 800, 9 x 60 seconds exposures, 15 darks, 50 bias, no flats, PixInsight for everything except the colors/saturation. Pipe, Trifid and Lagon nebulas, with some Barnard 5DmkII, Astrotrac, 85mm f/2.8, ISO 800, 30 x 60 seconds exposures, 15 darks, 50 bias, no flats, PixInsight for everything except the colors/saturation. Rho Ophiuchi A mosaic of the last two images Click on the pictures for a larger version I hope you liked them ! And if you're on the fence to buy an Astrotrac, just do it, it's an excellent piece of gear. Clear Skies
  3. wimvb

    ngc1499

    From the album: wvb_dso

    NGC1499 17 * 3 and 4 mins frames
  4. I’ve often read 10x50’s are the ideal binocular size providing a good balance of weight, aperture & magnification. I’ve had my 10x50’s for a long time now and they’ve given me some great views. However I’d often craved for a wider fov whilst scanning constellations, just a little bit extra to put the view into more context, so I recently bought some Victory 8x42’s with a 7.8° Fov. I’ve now used them a handful of times & I’m really enjoying them. For such a relatively small difference in fov they provide a surprisingly different experience. I can’t quite see as many DSO’s, but I can still see the likes of M13, M15 & M38 (but not M36, so far anyway), or maybe the other way around. My light pollution made DSO’s quite difficult to see in my 10x50’s anyway, so I’ve come to enjoy the star clusters and patterns across the sky with binoculars. With this in mind I can now see nearly all of Lyra, and more of some of the fainter constellations that are not visible to me naked eye, but with a good magnification and optical quality. It is much easier for example to pick out Delphinus and Equuleus and to hop between star groups whilst maintaining my bearings. M15 is easy to pinpoint as I can just triangulate from Enif & Delta Equ. Something new the other evening was the Circlet just South of Pegasus and whole head of Draco. I also had some stars visible in the same field as the full moon, I don’t remember this with the 10x50’s. Although I haven’t had them long, I think 8x42’s are going to be much better for me than 10x50’s.
  5. Before I start running my fully automated observatory from a remote location, it is useful to know what the weather conditions are like at the observatory site and an all sky camera is a great way of seeing what is going on in conjunction with my AAG CloudWatcher that 'measures' the weather conditions. Unfortunately, commercial all sky cameras have a pretty hefty price tag and I had a very limited budget for this project so I decided to make my own. The camera is the easy part and the excellent ZWO ASI 120mm was an obvious choice - it even comes with a 150° wide angle lens. However, the key to a reliable all sky camera is the enclosure it operates in. A camera and lens combination like the ZWO will work very well on its own for this purpose right up until the dew forms on the lens or even worse, it starts to rain so a waterproof enclosure with its own heating system is a prerequisite. Before I even started to think about the enclosure itself, I gave a lot of consideration to the heating aspect. The solution was sitting in my bits and pieces drawer - the components that I'd bought in a couple of years ago to make a dew-band for my 28mm camera lens when I wanted to capture a meteor shower! I never did make the dew-band but the Nichrome wire and pulse width modulation (PWM) power supply were perfect for this project. I calculated that I would need up 8 watts of heat for a 'de-frost' but a lower output for general use. With the heater resolved, I looked around for a suitable transparent dome for the enclosure and found a 100mm diameter dome for under £10.00 on Ebay. All I needed then was a suitable box to match the total width of the dome and again, Ebay came to the rescue. Awful skies mean that I have used it very little but I have enjoyed making time lapse videos of the night sky and I ended up buying a fisheye lens for the camera to give me a full 180° view. So here's the camera enclosure in all its glory Click here to view my first light timelapse video
  6. wimvb

    ngc1499 051215

    From the album: wvb_dso

    Area between M45 (bottom) and Mirfalk (top) with California Nebula as central point of interest This time without the distracting noise
  7. Hi all, last night the sky looked very clear, so i thought i'd take the camera out and try to capture the summer Milky way, so i drove a few miles outside of Norwich to a reasonably darkish site, but noticed there was a lot of moisture in the air, the lightdome from Norwich and Wymondham was sizeable but straight up wasn't to bad, so i set the tripod up and grabbed my new Canon 6D..........and no quick release pad it was on my telephoto at home, D'oh But the milkyway looked so amazing and so close to a city i had to persevere, set the focus, set 10 second timer and laid it face up on the roof of the car, far from perfect but the resulting pics made me smile, this is one of the shots....... Its a single exposure at 17mm 20 seconds @ f/4 and an ISO of 6400. The processing brought out some noise but its lightyears ahead of the cropped 60D in terms of quality, if only i'd remembered the quick release pad
  8. wimvb

    M31 M33 Hdr

    From the album: wvb_dso

    Wide field around Mirach Shows the relative position and size of M31 and M33. To the far left is Schedar (a-Cass). Just below it is a tiny nebula (NGC 281). 22 2 min subs, flats, darks and bias
  9. pixelsaurus

    Comet Lovejoy

    From the album: Pix pix

    Predawn sky December 25 2011. 30 sec, Tokina 28-80mm @ 28mm, f/3.5,Pentax *ist DS, ISO 3200. Otaki Beach,NZ.

    © Mike Nicholon 2011

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