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alacant last won the day on April 5 2018

alacant had the most liked content!

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About alacant

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    White Dwarf

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  1. Hi I think only you can decide that but if you're an ap and want to fix the aberration and allow the telescope to hold collimtaion: -remove the mirror clips -remove the main mirror and 'glue' in place with neutral weather sealant silicone -loosen the mirror cell locking bolts and add strong passive springs to them. Leave the locking bolts loose. -add m6 washers between the mirror cell and the main spring adjusters. The idea is to obtain greater spring compression. -replace the secondary mirror with this one and blacken its edge -replace the dovetail bar with a 50cm long Losmandy version -tie the top of the the tube rings with strong aluminium box section. We used 4x2x60 2.5mm wall aluminium window frame stuff. -remove the focuser and bolt and glue a 0.6mm blackened aluminium sheet around the tube. A paper template helps. Inside the tube is elegant but we gave up and went outside. -affix a 30cx30cm square of black canvas(?) -sorry, forgotten what it's called in English- inside the tube opposite the focuser. Double sided tape is good. -fit a proper focuser -decide you've had enough of sw products for ever and make a €300 loss on the resale, just to see the back of it. The only alternative I can find which may work out of the box is the priced-like-a-small-refractor cr ontc. Please note that i am not an expert on this stuff and must credit @laser_jock99, our resident Newtonian modification expert, for the influence on the above. Cheers and HTH but do tell us what you decide to do.
  2. Hi A works-for-me suggestion. Fit a second dovetail plate along the top of the rings and bolt this to it: Guide telescope + guide camera HTH
  3. Hi. Yeah. Good idea. I'll have a go.
  4. Hi. Yeah, GIMP will do it. Also, if the op is ok with apps, there's Siril's (among many) sqrt or asinh stretching and StarTools' FWOABW 'second-AutoDev' module. Then there's... aahgghh stop! Cheers
  5. Ah, ok. Stretch the bottom layer less until the witch star is acceptable (the rest of the image will be too dark) then with your normallly stretched (but masked) layer on top, use a fuzzy black brush to punch through the mask directly on top of the offending star. Try different opacities until it's seasoned to your taste. HTH
  6. Hi Do you mean without a dedicated processing app? There's a tried and tested method from way back which consists of stretching your image with an inverted star mask layer over the top of a duplicated image. This guy explains it. Not very elegant, but it maybe worth a try. Cheers and HTH.
  7. Hi. Another way of doing this is to add another washer. HTH
  8. Siril, StarTools, DarkTable under Ubuntu. Relief when my pi trial finally expired;) Cheers
  9. Phew. History and the heady days of getting started. Still getting started but have since moved to INDI. Cheers everyone.
  10. Hi again. There are many different solutions to get a DSLR in focus on a 130p. The Barlow is among them. Only you can decide what's acceptable and no amount of reading or research online is going to join the dots you need. My advice would be go along to an astro club and let them show you first hand the results you'd get with a DSLR, Barlow and your 130. Armed with that experience, you can then make an informed decision on DSLR purchase or otherwise... Cheers
  11. Hi Most cameras designed for astrophotography will focus fine. If you want to use a DSLR, that's where you'd need a Barlow, but unless you've changed the focuser, a 2" version won't fit. Try instead a 1 1/4" version. There was most likely one supplied with the telescope. You'll also need a t adaptor for your camera into which the Barlow screws. HTH
  12. Hi JTOL... It's only another €160 or so for a 130pds. That along with the 200 would cover you for both planets and (between the two of them) deep sky objects. HTH
  13. Hi File a mm or so from the top end of the central threaded rod. The one you tighten from below. HTH
  14. Hi everyone Tropical rain-forest conditions in Alicante last night with the humid easterlies ensuring no one without ac slept and no one with a telescope got a decent image. As owls gave way to gulls, I saw to my horror that the mount hadn't parked. There's always something to investigate... So with the self pity and excuse section out of the way, here's the image taken with an eos700d at ISO800. It's an uneven -ugly- patch of sky. I found that if you denoise, you lose the patchiness, so I used StarTools' gentlest of gentle post tracking modules to keep at least a bit of detail. Oh, and those awful foreground stars! Anyway, thanks for looking and do post your images of the same. I learn a lot from comparison.
  15. Hi Most of our telescope wielding UK visitors come over will ill fitting mains plug adaptors. Tip: buy them in Spain. I see that @feverdreamer1 has already told you how wonderful Spain is, but do allow me to confirm his enthusiasm:) ¡Saludos!
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