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Dual RASA 8 rig - nearly there
Jessun replied to gorann's topic in Discussions - Scopes / Whole setups
Hej gorann, I have shelved what little I have left of a triple rig and I am no longer an active imager - if that is even a word... My view from experience is that once aligned, the OTAs should be left alone. By that I mean that after painstakingly aligning two or more OTAs, a new attachment point will just create more issues. I doubt that a bar can be secured without upsetting the initial alignment, or introduce another thermal expansion issue. You will most certainly end up confused as to which bolts to adjust, much like trying to cut the four legs of a chair dead even, in order to prevent the chair from behaving like a metronome. I shimmed my first triple rig to decent alignment, and for my second triple setup, with heavier OTAs, I used two of the saddles that you use. I found that the OTAs behaved in a similar way and there was no individual flexing worth noting. They all seemed to warp in unison. I never ran multiple reflectors though, so I would tend to agree with the comments that focus on the mirrors, rather than the mounting hardware. Good luck with the mission! /Jessun -
Approaching 4 years from first asking a question, poor Jez is quite possibly none the wiser...
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Hi there is no glass in the focuser or in that end of the tube, only at the front. EDIT: No Jessun, that is most probably 100% wrong... I don't know that focuser but I hasten a guess that where it rotates is where you can take it apart. I would hesitate to unscrew the entire focuser where it mates the white tube. The focus knobs come off if you have the right allen key, but these are grub screws inside there and there's only so many times you can do that before the screws are destroyed. I would leave that as it is. /Jessun
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I suggest not spending money on LP filters. I have tried them all. Just balance the curves in your processing software and it's dealt with free of charge. /Jessun
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Are you already running a laptop remotely?
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Small PCs like that one are great sitting by the rig and run over Wifi with a remote control program. I used to run three Shuttles at the same time from a laptop. /Jessun
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"New to me" - Astro-Physics 1600GTO - Big thanks to Jesper!
Jessun replied to rrb24's topic in Discussions - Mounts
Pleasure, Roberto! I'll look out for you on Astrobin 🙂 /Jesper- 1 reply
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Focal length of the SW finderscope used as a guidescope?
Jessun replied to SmokeyJoe's topic in Getting Started With Imaging
Is this of interest though? I mean not the thread as such but the FL of a guide scope. PHD and other software don't mind really. /Jessun -
I agree with what is said above by other members. It's been some time since I used my Canon DSLR so my advice about stacking was not clear. I assumed a run with the filter and another without it. Sorry for the confusion. As to the rain effect, I'm sure you can search for 'rain' or something and find some threads on the topic. /Jessun
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I'd say that is a 'normal' result looking at the time and number of subs. DSLRs often produce these rain like streaks and I never found a good way around it in processing. I had some software that had an anti-streak routine but can't remember which one it was. For stacking, you are limited by your data. With that I mean that after stacking you will be able to pull out whatever it is you are looking for. But for this target, very Ha rich, I see no reason why you couldn't stack the whole lot AND separately stack the red channel to have a look at what's in there. You can use this as a separate layer, if layers are something you are familiar with. /Jessun