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Gary Shaw

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About Gary Shaw

  • Rank
    Vacuum

Profile Information

  • Gender
    Male
  • Interests
    Skiing, Rowing, Climbing, Hiking, and of course...astronomy
  • Location
    Boston USA
  1. Hi All: I just acquired a 200mm F4 newtonian from TS Optics which I'll use primarily for Electronic Assisted Observing with several ZWO cmos cameras. My challenge is that my current scope is an F3.6 schmidt newtonian so I have no experience with coma correctors or spacers/adaptors in the optical train. TS tells me that I need 55mm from the coma corrector (TSGPU) to the sensor. They provided 40 mm of various adaptors and spaces and I guess I get the remaining 15mm from the camera housing itself - as shown in the attached image. The threads on several of the adaptors(see notes) are bad so those pieces need to be replaced but, once that's fixed, I have four questions for this community: 1. ...is this odd assortment of parts and pieces typically how one goes about achieving the required 55mm dimension from the Coma Corrector to the camera sensor? Just seems that there must be a simpler, and sturdier way to do this without having to use 4-5 separate parts. 2. Once all the adaptors add up to the correct dimension and are attached to the Coma Corrector, where does one locate the whole assembly(with coma corrector) in the focuser draw tube? Is it a matter of trial and error? 3. If one did not care about viewing peripheral stars looking a bit like comets and didn't, therefore, use the coma corrector, would any of these adaptor/spacers be needed to bring the camera to focus so one could observe using, say, Sharpcap 3.2 Pro or other software? 4. If I were to use a filter or two, where would these best be located in the lineup and do they work with the various threads and adaptors? Apologies for my lack of experience and thank you for any help you can provide me in understanding how to observe and image with coma correctors Cheers Gary
  2. Thanks Freddie. I started there and then added the topic post here where its possibly more effective.
  3. Hi David I appreciate hearing your story. Being in the US, I don’t have an easy dealer option. If I go ahead with the purchase, I’d take your advice and go through a dealer although one in the greater London area might be a good idea if I’m going to fly over to inspect the scope before accepting delivery. They only list international dealers on their website, including one in London. Are there additional local dealers I should consider working with? Thank you! regards, Gary
  4. Hi Mr Niall - thank you for sharing your experience...sorry to hear of your problems. I’m struggling here in US to find a quality scope so, after discovering the OO scopes and finding they are made in the UK, I was encouraged. OO sales have responded nearly instantly to 2 emails already and we are about to schedule a call to address my questions. I’d say a far better response than I’ve had anywhere except at iOptron where their tech support is outstanding. regards Gary
  5. Hi All I’m considering purchasing an 8”aperture, f3.8 newtonian ( primarily for EAA) from Orion UK and would appreciate any input or feedback from anyone familiar with the product, the company or the purchasing process - and how to assess the compatibility with my current cameras. This is would be a step up from my current equipment and entails selecting components that I’ve never used and know little about such as a rack and pinion focuser and components (ACU-3L), and coma corrector (Wynne Corrector). I’ve added links to these items below. I’m also feeling unsure of how to mate up my Zwo 178 and 294 cameras to the 3” focuser and whether there will be an acceptable match between the scope optics and my sensors. I’m sure the folks at Orion UK will assist with all this but I’d sure welcome input from the Stargazer's Lounge community before starting the dialog with Orion UK. thank you in advance for any help you can provide! Gary ACU-3L Focuser selection Info: https://www.orionopt...sers.html#ACU3L Wynne Corrector selection Info: https://www.orionopt...torsfittin.html
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