alacant

Hi everyone Not had the little 130 out for too long. We used an old eos 450d which a visitor had brought along. It made an interesting comparison with our 700d. The 450 seems more sensitive -we took 4 minute frames- perhaps at the expense of noise. Has anyone done a dslr sensitivity comparison I wonder... Thanks for looking and any 450d users do share your experiences...

+1. Yeah, there's so much rubbish out there. It's just a flat mirror which apart from reflection does nothing to the incident light falling upon it. Get it close and leave it! I wish I had read nothing before I started. All I needed was someone to say 'make it look like this'. With apologies to @Jason D for reusing the post. Cheers and clear skies

Hi Don't forget that what we do have in Linux is support. The indi devs will ssh/teamviewer in and fix your problem there and then. **To save embarassment, firstly make sure that it isn't something obvious; the last time I asked for help, all that was done was change the configuration and hit save. I had forgotten the latter. DUH!

Here's your kick start. Let us know if you get arount to it:) Cheers and good luck.

Hi. If you want a terminal, you can ssh into the server but hey, pointing and clicking is hard enough as it is. I shudder to think what a command line script to control a focus, slew, platesolve, take-50-exposures, dither etc... would run to! Here's an example script from the indi forum for starting a session. I'm afraid my Linux experience doesn't run to that complexity but -if you're brave- you could try the indi forum;) Cheers and good luck

Hi. Center the secondary so you can see all clips. But be sure to read the myths of collimation before you begin adjusting. HTH

You'll be a few years yet then. Makes Linux look like a walk in the...

Hi again everyone Just my quarterly progress check enquiry. Has anyone managed to witch from something else to Linux yet? I had an eyeopener last week when helping a computer literate friend make the switch. It reminded me of how difficult it is to change one's set ways of working. It collapsed completely just after I opened a terminal and began typing. Had I not done that, they would probably be on board now. So, c'mon. Tell us your migration stories. Good and bad. Cheers and the best of sudo apt upgrade to all.

Hi. No. Decide where best you want it e.g. if you have a rectangular sensor, the centre of a long side is a good choice. Now take flat frames pushing the prism toward centre field until you see its shadow. Then back off a little. The idea is that you can rotate the oag to pick different guide stars but unless you're at a very log FL or you have an old guide camera, choose maximum prism insertion and leave be. HTH

? It IS a ts oag: https://www.teleskop-express.de/shop/product_info.php/language/en/info/p2722_TS-Optics-Off-Axis-Guider-for-Canon-EOS-cameras---replaces-the-T-ring.html How is yours different?

No. HTH.

Hi everyone IMHO, we need to give the OP a snap of one which is working, no? HTH

It can be quite alarming when you look at the diameter but it's really the area you should be comparing. What is even more alarming is how much light is lost by bypassing small secondaries altogether. We found out by accident by pointing a reflector we were upgrading at the sun. You could burn paper held at the open end of the tube by the light that was missing the secondary altogether! There's an article on it here. I don't see why photographic newtonian manufacturers insist on having the focal plane so far out from the tube wall. Having a low profile focuser with a smaller secondary would be far better. Yeah, I know TS do it, but at €silly. Cheers

Hi. Yes. No problem. I mentioned it only because you may think the vignetting excessive (if you've tried say a slower reflector) and blame it on the cc. For reference, the secondary fitted to our 8" is 85mm. Cheers and HTH.

Hi again. No. The filter must go either on the nosepiece of the cc on the telescope side. If you want it between camera and cc you'll need a clip in type. **You could attach a 48mm filter to the male thread on the camera side of the cc but hey, spacing is critical;) HTH

Hi. We use it with aps-c and an ES f3.9. It covers the whole fov but with the small secondary on the quatrro, you'll see a lot of vignetting. HTH,

Not sure; blue and red curves?

Hi I don't think it's a regular collimator is it? Instead, how about a simple Cheshire sight tube? One with cross hairs so you can get the secondary in place, even better. No need to square anything or do a star test. Have another read of the collimation myths: If you want perfect -small- stars right into every corner, it's gonna have to be the 4 element gpu But IMHO, just as well correcting coma and tilt in software. Anyway, good luck and clear skies.

Hi. Be sure to read the collimation myths before you agonise a moment more;)

Hi. On a dedicated camera, £600 buys you a miserably small sensor whereas £400 gets you an astro modified dslr with a big aps-c sensor. It depends upon what you want to photograph. HTH.

+1. To make it less so, be sure to obviate the need for allen keys -tilt- and place a teflon plastic milk carton washer -rotation- between the secondary stalk and the three adjusters. HTH.

Too late!

Almost there then. Well done?

Hi everyone Six months on now so just a curiosity check to ask if anyone has managed it yet. As it is seemingly as impossible as astro-photography itself, I thought that someone else may have photographic evidence... <latest advice> Please don't burden your attempts with old computers or SBCs with little or no clout. ASCOM on an i7 gaming machine is difficult enough. Multiply that several fold and you have an idea of how difficult INDI is going to be on anything less. Or is it? </latest advice> Did you hear the one about the guy who posted a newbie question on a Linux forum? Is that provocatively challenging enough I wonder?! As it's a festive time of year, here's a shot of my hastily-thrown-together-wide-field-takumar-200 INDI setup used for the comet. Merry Xmas everyone.

Hi. Good advice:) Another way I've found is to use an OAG with PHD2's PPEC. HTH