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Found 18 results

  1. I am looking for a really good Barlow, that doesn't compromise the performance even of the greatest EP's. Speaking of good EP, I already have a 3.5mm Delos - "Barlowing it" puts any scope on its edge anyway. I intend to use it on my 90/600 APO and possibly a c11 in the not-so-far future. Any recommendations, which one to take? Right now, I am looking at the Powermate 2x. I see, it's a corrected optics, but is it also APOchromatic? Other, quite exotic piece I found and seems interesting, is the Baader Fluorit Flatfield Converter. Latter seems interesting for planetary photography too.
  2. For sale is my lovely Explore Scientific APO ED 102mm triplet refractor. Lovely condition, great optics that are unmarked and blemish free, views are stunning and pin sharp. Selling due to lack of use, as a recent change of job keeps me away from home quite a bit, so its not getting any use. Comes with: Essential 102mm triplet APO refractor Tube rings with integrated carry handle Vixen dovetail 2 inch visual back / adaptors and focuser Aluminium case It is the essentials model so didn't come with any finder or diagonal. Price is £450 ovno due to condition and inclusion of vixen dovetail. Payment accepted is cash, cheque or bank transfer (which is easiest) or PayPal if buyer pays fees. Pick up only or can meet half way by arrangement - don't really like sending optics through the post. Thanks for reading and if you have any questions then please pm me and we can discuss in more detail.
  3. Dear Riccardi Users & any knowledgeable Stargazers: the specs of the smaller, M63 Riccardi APO reducer say that it has a 42mm corrected field. Does it work well with full-frame cameras? I would like to use it on my 90/600 TS photoline APO. The bigger one would be quite tricky to mount:(. As for camera, 1st round I'd get a sony A7, but later on maybe a large mono CCD/CMOS when they become more affordable.
  4. Just a quick remark on the popular 80mm FPL-53 f/6 triplet sold under many brands. After I got my 3.5mm 110° Myriad, I pushed the magnification higher than my 4mm/82° could (240x). The Myriad alone produces 137x, which I doubled with that famed and faultless Celestron/Vixen Ultima triplet barlow to obtain 274x. 204x (4.7mm Explore inserted in Ultima barlow) made no chromatic blur, and could be tested anytime. 240x (4mm/82° TS plus Ultima barlow) was not possible unless turbulence was unusually quiet, but showed no fringing either. 274x was too much to wait realistically for a super-quiet night, so I did the test by day when air motion was tempered by some cloud cover and very light rain. Despite the reduction of sunlight and transparency, these conditions make the air calmer than is customary. Well, looking at a dark electric pole in front of a pale gray cloud cover made no fringing apparent inside the dark area of the pole. And looking at a pale gray cement chimney top against a dark foliage background didn't spur any fringing either outside the bright area of cement, despite the fact that turbulence accentuates the chromatic blur. 240x is the practical limit, very spacewalky on the Moon with no lack of brightness, but knowing the image is still free of aberration at 274x makes these triplets even more recommendable.
  5. Hey guys I've finally managed to get myself an NEQ 6. now I'm looking for a scope. After months of reading and searching on the net, I ended up with three decisions. I will use the scope for Deep-sky, but i like to do planetary sometimes. 1- Sky-watcher Quattro 8 f/4 (Good aperture, Good FL and Good Optics / collimation and bad built quality) 2- William Optics GTF-81 Five element APO (Good (built and optics) quality / limited aperture) 3- Sky-watcher MN190 Maksutov-Newtonian (Good for visual and AP / high weight and higher price) Its a dead end for me, each one has Pros/Cons of its own and i cant choose. So I hope you can help me out. I'm not trying to start the old war of Refractor/Reflector so don't fight each other I will add a long FL system (RC or SC) in a not-near future but for now it will be all i have. I will image with a Crop DSLR (Nikon D5500), I plan to get a CCD but it too belongs to the same not near future. Thanks in advance and I apologize for my Bad English.
  6. Coco

    M13 Hercules Cluster

    From the album: Coco'c Mono LRGB

    M13 in RGB only, only a quick shorty as the sky doesnt get dark properly oop norf.. 4 minutes x 5 each RGB filter no LUM for globulars, ATIK 314L+ & APM APO
  7. Hello All, I have a quick question. I am thinking (very loosely) about the possibility of a small APO for wide field views to piggyback on my CPC 1100. I am interested in recommendations. At the moment I am not planning on AP. I can see that there is a huge range in prices and to be honest I am looking for something thats reasonably decent quality (circa £500 - having no experience with APOs I really don't have a sense as to whether thats quite enough or not really enough). I had looked at the Orion Carbon Fibre 80mm f/6 APO Triplet but its just a bit too much money. Please advise... And many thanks.
  8. Well, it was going very well, and I genuinely have shifted a huge amount of kit, leaving just my Tak and TAL (well actually two TALs but that's another story!) I do miss my little Taks (60 & 76) though especially for taking abroad so when this little beauty came up, I couldn't resist. It's a Burgess Optical 91mm Triplet Apo. Very compact scope for the aperture, and even better, it splits in half so making it very convenient for air travel. The objective is in near perfect nick, I understand it's a cemented triplet with fpl-53 and Lanthunum glass elements. The weak point is the focuser, but I acquired a nice Moonlite from the FLO clearance which should go on nicely. A FeatherTouch would be much lighter and in keeping but I cannot afford one currently. Perhaps a future upgrade, and I can put the Moonlite onto a 120ED when I eventually re-buy one. First daylight views are promising. Straight out of a warm house, there was some CA present off axis, but on axis it was nice and sharp. After around 30 mins, it appears basically CA free (looking at thin branches and aerials against the background sky), so I'm hopeful the Astro views will be similarly positive. Whilst it's windy today, it looks like there will be some clear patches coming through so I'll have a little chance for first light hopefully.
  9. Hi SLG gentlefolk, About 4 months ago I got into the process of ordering a custom made refractor - still an ongoing project and I thought I would share the experience with you Why a custom refractor? There is a certain kind of pleasure in getting something custom made for you, be it -I don't know - say cufflinks or a refractor. I certainly did not seriously plan to order one but randomness coalesced into a weird coincidence and that is exactly where I am now. This will be a rather long thread with a little bit posted every day as I am going through a lot of email exchanges (117 emails so far) to gather the pertinent parts and will document the built of a custom built refractor by Moonraker Telescopes UK . In retrospect, I can only say that it is truly my fault. How did I end up meeting Mark? Mark Turner is the man behind Moonraker Telescopes. The only "contact" I had with Moonraker was through Astrobuysell UK classifieds when once I clicked on the advertising banner link for Moonraker, checked the scopes really quick and said to myself "cracking scopes, not for me, let's move on". Moving on a few months down the line and specifically mid-July, I had a spare red Moonlite refractor focuser which I listed for sale on Astrobuysell UK classifieds and Mark needed said red focuser for a refractor built. I called him to discuss the focuser and we ended up chatting refractors, refractors and even more refractors. And that's when I decided I needed a custom refractor and to see how far down the proverbial rabbit hole I would go. Talking to Mark about scopes in general, I realized that I never actually fulfilled this unknown need of mine for something unique, despite trying refractors from 120mm down to 60mm (in 10mm increments), from Achro to ED and APO and never being fully satisfied. In the end, his insights transformed my initial vision to what I am happily sharing here. This is truly a labor of love and the sum total of significant effort to bring about this fine instrument, giving ultimate joy of looking through and also looking at the telescope.
  10. I kinda "force" my Astrotrac with my 102ED on top so I'm out shopping for something more appropriate... an 80 mm FPL53 is a must for both doublet and triplet. It will be used for astrophoto and visual g'n'g. After tons of reviews and articles I came with a very shortlist. And here comes my indecision, since the tubes are more or less "identical" but labeled by different companies. -triplet represented by Orion ED80T CF Astro-Professional APO 80 Carbon TS 80mm f/6 (not Carbon) Tecnosky Triplet FPL-53 APO 80/480 -doublet (more or less alike) made by TS 80/500mm Altair Lightwave 80mm F6.25 The budget is 1000$ (~800e) not a cent extra Altair Lightwave doublet and AstroProfessional triplet are my favorites, but can't decide which. thank you
  11. Well, I've gone and done it now. After dithering about a new scope, bouncing between aperture, exotic glass, weight, type, suitability for photography and so on, I finally decided a nice apo in the 4.5" - 5" category would be good. So what did I get? Notwithstanding sensible advice to the contrary, and having read many and varied posts about the potential pitfalls, I've bought a TAL 125 Apolar. For a bit of context about the madness of this decision, check out this review of the Apolar by John back in 2011 - http://stargazerslounge.com/topic/104408-tal-125r-apolar-apochromatic-refractor/?hl=+tal125%20+apolar. Now, I already own a TAL 100RS, a fantastic cheap robust and optically excellent 4" achromat, albeit somewhat indifferent in finish. I also own a TAL125r, a 5" achromat which I had to import from Italy, and which reuired the attention of a proper optical engineer to get it to give reamotely near its best. Also indifferently finished. So why have I exposed myself to the ups and downs of yet another TAL adventure? Simple - I've hankered after one since I read John's review, And recent reductions in price by OVL (presumably shifting stock) meant that I could get one new for around a third less than the standrd price (c. £1k as opposed to £1.5k). Ordered from Widescreen Centre on Thuraday evening, and arrived today. So on to the unboxing... . Obligatory stickers in Cyrillic shots The contents in a rather nice wooden (pine?) box (as opposed to the rough weapons crate my 125r came in); https://farm1.staticflickr.com/716/23095706913_bf1e81b63e_c.jpg[/img From the Instruction booklet, serial number 0165 and acceptance date in August 2010!: More to follow.
  12. I say first light, it's actually second light but I had a better go this time although still fairly brief. The fine focusing was not working when I first got the scope, so I had a play around with that and successfully sorted it, plus made the overall movement better. Having bought a Moonlite for it, I actually think I'll stick with the original focuser, it does the job and is a fair bit lighter and less bulky, so more suitable for travel. When my numbers come up on the lottery I'll fit a FeatherTouch to it, but for now I'm happy. The Burgess is an f6.6, 600mm focal length scope with a cemented triplet objective of fpl-53 and lanthanum glass. It has a removable section in the tube, perfect for binoviewing at native focal length, but also handy for travel as the tube splits apart. The scope actually takes quite a while to reach ambient temperature. During cool down, the star shapes were pretty dodgy, looking a bit like pinched optics, but once cooled it looked fine. When I've finished my Harold Suiter book I'll make a more informed comment about the star test ?. Collimation looked fine though. I was using the TAL alongside for comparison on the Giro-WR mount, with a 7mm BGO in the TAL and 3 to 6 Nagler Zoom in the Burgess to give roughly similar mags at around x140 to x150 but I mainly used the Burgess at 6mm ie x100. There is some flaring around bright stars, perhaps just the objective needing a clean or muck somewhere else in the optical path so I'll check that out. Colour correction is excellent. No false colour on the moon and a nice neutral tone to the views. Side by side with the TAL, the differences are very noticeable, the TAL actually shows its larger aperture by way of a brighter image and slightly, but noticeably higher resolution on the moon and Jupiter, but also has a fair amount of false colour on the limb and on brighter stars. I didn't buy the Burgess as a planetary scope obviously, but it's nice to know that it gives enough detail on Jupiter to be of interest. Even while it was still low, there was detail in the two main belts and a couple of the temperate belts were visible in the polar regions. Interestingly though I didn't notice the GRS in either scope which should just have been visible towards the end of my session but to be fair I didn't spend long on Jupiter. I am more interested in the widefield views, the main reason for getting this scope is to be able to take it south and view some of the wonderful objects in Sagitarius from dark sites. My lowest power eyepiece currently is the very nice 24mm Panoptic, nice and compact for travelling and giving a 2.72 degree fov. With a 31 Nagler it would be 4.24. The scope has a fairly flat field with the Panoptic, giving sharp stars across the fov. The field was definitely flatter than some of the faster ED doublets I've owned and the Pleiades looked lovely, as did the Double Cluster. Despite the bright moon, the DC was showing delightful tiny pin points of light with good colour variation in the red and orange stars. Rigel's tiny secondary showed up clearly, although the flaring around the primary was more than I would have expected. Polaris split nicely. On to M42, and although washed out by the moon, there was plenty of detail in the nebulosity even unfiltered, and the Trapezium was, well it was the Trapezium. Seeing wasn't brilliant but it looked sharp. In summary, I'm very pleased with the scope. It is built like a tank, but is very compact still. With the focuser removed it fits nicely in my new 1510 Pelicase which is airline portable. I'll post a link to my contribution to the Grab and Go thread where there are pictures of the kit. The only negative really is that being a cemented triplet, I can't use it for solar without a front mounted D-ERF. I do have a 75mm one bought for a PST mod though, so perhaps I can source an adaptor to fit it on the dew shield and just accept the lost aperture. More to follow when the moon is out of the way ?
  13. NOW SOLD! I only have room in my life for one lovely refractor, so one must go. I have acquired a Takahashi, so my beloved and well cared for William Optics Zenithstar SD66 has to go. It is optically perfect with no scuffs or scrapes. Has been used as a guide scope and astrograph on my LX90. It comes in its aluminum flight case. OTA only. Price is £280 or 325 euros, to include postage within the EU. PM me if interested.
  14. Hi Guys, any one had any use of a Technosky Apo or know anything about them. I am looking at getting my first apo as usually I am Astrograph man and seen this 70/478 mm quadruplet flatfield for £482. It seems a good deal but was just wondering about the build quality? As this seems cheap for a quadruplet!!! https://www.astroshop.eu/telescopes/tecnosky-telescope-ap-70-478-quadruplet-flatfield-ota/p,57327#tab_bar_1_select
  15. Greetings stargazers, I'm considering buying a new telescope (my first telescope) for astrophotography, and some visual astronomy. But I can't decide which type should I get. I mainly want to photograph deep sky objects. After testing some variations in Stellarium I am worried that some deep sky objects won't fit into the aperture of an 8" reflector. I'm wondering which type should I get. And also I'm worried that I won't be able to photograph anything with a small refractor because I live near a city. I am also open to any suggestions for a beginner astrophotography telescope. (around 800$ would be perfect) Thank you:) I apologise if I made any writing mistakes. Edit: I'm considering buying a Bresser Messier 203/800 or a William Optics Zenithstar 61 but I'm still open to any suggestions.
  16. FOR SALE Skywatcher Equinox 120 APO PRO (case and OTA). I only bought this in Febraury from The Widescreen Centre and it has only been out four times. Near mint condition, albeit some marks on the dovetail as you'd expect. It was bought with the intention of putting together an AP set-up. However, changed financial circumstances prevent me achieving this aim at the current time. I have a new unused Baader Sky Surfer V red dot finder to accompany it which I will include with the telescope. Asking for c. £900, but open to offers including part cash and/or swap offers (ideally SCT/MAK/achro 'frac over 150mm). I'm happy to deliver within a c. 150 - 200 mile radius of York. Happy to answer any questions :).
  17. Hi, I am new to refractors and have a problem with my WO 71mm Star f/4.9. If bright star is in FOV I get this horrible halos/fringing. Isn't that supposed to happen only in doublets? uncalibrated example of problem is in attachment, left star is the worst (taken with Sony A7r, 120s exposures) Thanks!
  18. I was wondering if the smaller, M63 thread Riccardi reducer is enough to light up a full-frame sensor? I have a 90/600 apo and intend to use the reducer with all kind of cameras I encounter, Sony A7, monochrome CCD, etc. I expect this piece of glassware to be a (very?) long-term tenant in my gearbox:). According to specs (42mm field diameter), it should cover the frame. Does anyone using this reducer?
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