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rockinrome

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About rockinrome

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    Star Forming

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    http://mmastrogroup.blogspot.co.uk/

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    Derbyshire
  1. Not sure, but Altair says: "Works particularly well for refractors telescopes of F5.5-F8 focal ratios, however also known to work with RC telescopes."
  2. I have the Altair Astro 0.8x reducer/flattener - https://www.altairastro.com/lightwave-08x-reducer-290-p.asp
  3. ..... oh ... and .... those stars look pretty good to me at 4min subs!!!
  4. Great picture! Just a word of caution with OAG and refractor. I used (with some success) an OAG with a 72mm refractor. I say some succes as guiding was lost from time to time through loss of clarity in the star. My guiding graph was "OK" but was a bit saw-tooth like. I then moved to a 32mm mini-guider and my guiding is now near perfect everytime - guide graph is almost level with minimal nudges. This was the only change and my images are much sharper as a result. The final image is of course the real test! Best regards Matthew
  5. It will certainly improve your images. I use a 0.8x but not this one. It will reduce your effective focal length and therefore the f-number, allowing you to take deeper images (more light gathered for the same exposure time when compared without the reducer). Regards Matthew
  6. Agree with Chefgage - flattener/reducer is a must. You will also need the T-ring adapter to attach the camera onto the back on the reduder (I have the altair and this is possible - don't know about the OVL). With this you will need to handle the back focus of the reducer to the camera - so from the lens of the reducer to the focal plane of the camera (should be in the spec. of the reducer). For my reducer this is 55mm. I have a Canon 600D - from lens flange to focal plane this is 45mm, so I make up the 10mm difference (luckily) with the T-ring that screws into the reducer. Easy really - just seems complex!! All the best Matthew
  7. Hi Simon - sent you a PM. Thank you.
  8. A pleasure Brian - should give you years of great views!! - don't forget the camera thread behind the rubber cup!!
  9. Hi Arabella - it's still available. Thanks.
  10. Hi Brian - still available. Thanks
  11. Hello. I have been having a bit of a cull lately and have some really good gear for sale - it is just not being used. Omegon CC 154/1848 scope BOXED. Dovetail rail. Back-focus adapters. (COMPLETELY NEW). £280. Collection only due to weight from DE55 (respecting distancing of course). Please see pictures and thank you for looking. Matthew
  12. I use the Optolong L-eNhance and that is really good with my OSC. Matthew
  13. The Star Adventurer or iOptron will be fine with a small refractor or something like the William Optics Redcat. Also .... these can be used with ST4 for autoguiding at a later date if required. Matthew
  14. Hi there! There is a useful tool for image scale on the Bintel website: https://www.bintel.com.au/tools/astronomy-calculator This lets you input your scope etc. details along with the camera and shows you (for example) if you would be under/over sampling or just right. Don't forget you can also BIN your image to get better sampling (and possibly use drizzling at the post-processing stage). All the best Matthew
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