Hi Cody, interesting video. Could you please show how to integrate a filter drawer to the imaging train of a SCT 8SE while respecting back focus constraints of a DSLR? Thank you very much.
As a side note- the Trifid nebula you showed doesn't show much of the blue reflection nebula around it because the L-extreme only passes OIII (Blue/Green) and Ha (Red). The Veil Nebula you showed has a lot of OIII blue/green though. Keep in mind all blue reflection nebulas will show poorly in L-extreme images such as the Pleiades etc.
awesome, i also have the zwo 294 now. I used it a lot lately, however I can see the secondary mirror in my pictures while the stars are in focus. I use the first attachment method and do not use a filter yet. Could it be vignetting problems?
Maybe you can use a some strong braided fishing line (or similar cable) to secure your camera to the telescope. Tie a fishing knot around a metal washer (maybe drill a hole in the washer, if that helps). Put one of the thumbscrews/other screws through the washer, to anchor it. A key ring might be an easy way to attach the other end of the line, to the camera fan grill.
I just received a camera today and was worried about it falling out when rotated down as well. I like your duct tape idea, but think I'll use safety wire or zip tie for a cleaner installation.Duct tape and zip ties will literally fix anything!
Our setups are very close Cody. Are you using the M54 2in extension tube? It appears that you are I could be wrong. I'm not because the draw tube blocks the light path and makes for diffraction spikes that I thought I saw in one of your images, great job by the way. I had to work on this I use the 21mm Zwo adapter between the cam and filter drawer mine is a Starizona but probably close thickness I did this to obtain back focus requirements for my Televue 0.8x and my Televue 2x powermate both rated at 56mm back focus. I did this so I could use the same camera spacers and drawer on most of my combinations without disassembly, and It gets the draw tube out of the light path. Maybe I'm seeing this wrong just thought I'd point that out since I'm a Comet Hunter Brother. Also I got my M54 to M48 from another manufacturer but it's short too Probably within margin of error. I also use a 183 not a 294 so vignetting is not a problem here but I wouldn't know about your sensor requirements. Have a good one! Clear Skies
AstroBeard Interesting! When I achieve focus I’ve found my focuser drawtube isn’t in the light path. It is with a DSLR but no the 6.5mm backfocus CMOS cameras. I use the 294MC pro because it has perfect sampling on the comet hunter and I use the 183MC Pro on the RASA 8 for the same reason. That’s a good way to attach your camera still! Thanks for stopping by. Clear skies!
ZWO ships their cameras with several black nylon spacers of varying thicknesses. If you put one of these in the T-thread fittings it will allow you to snug up the camera at different rotations for framing.
Hi Cody it's always an honor learn from you, clear sky.
Nice review Cody! Veil and Trifid looks nice!
Ray's Astrophotography Thanks Ray! Nice planetary shots you posted today!
I like the threading in idea However, my scope is new and it seem tight, really tight, should I keep applying force?
Hi Cody, interesting video. Could you please show how to integrate a filter drawer to the imaging train of a SCT 8SE while respecting back focus constraints of a DSLR? Thank you very much.
As a side note- the Trifid nebula you showed doesn't show much of the blue reflection nebula around it because the L-extreme only passes OIII (Blue/Green) and Ha (Red). The Veil Nebula you showed has a lot of OIII blue/green though. Keep in mind all blue reflection nebulas will show poorly in L-extreme images such as the Pleiades etc.
Could you drop a link for the M54 F - M48 M.
I use a tiny tiny amount of synthetic disk brake caliper grease on my threads. Keeps them from sticking.
That works!
I use grip gloves - everything comes apart with ease.
awesome, i also have the zwo 294 now. I used it a lot lately, however I can see the secondary mirror in my pictures while the stars are in focus. I use the first attachment method and do not use a filter yet. Could it be vignetting problems?
Maybe you can use a some strong braided fishing line (or similar cable) to secure your camera to the telescope. Tie a fishing knot around a metal washer (maybe drill a hole in the washer, if that helps). Put one of the thumbscrews/other screws through the washer, to anchor it. A key ring might be an easy way to attach the other end of the line, to the camera fan grill.
Cody would you please make a follow up review for the 6 AVX reflector?
I just received a camera today and was worried about it falling out when rotated down as well. I like your duct tape idea, but think I'll use safety wire or zip tie for a cleaner installation.Duct tape and zip ties will literally fix anything!
Our setups are very close Cody. Are you using the M54 2in extension tube? It appears that you are I could be wrong. I'm not because the draw tube blocks the light path and makes for diffraction spikes that I thought I saw in one of your images, great job by the way. I had to work on this I use the 21mm Zwo adapter between the cam and filter drawer mine is a Starizona but probably close thickness I did this to obtain back focus requirements for my Televue 0.8x and my Televue 2x powermate both rated at 56mm back focus. I did this so I could use the same camera spacers and drawer on most of my combinations without disassembly, and It gets the draw tube out of the light path. Maybe I'm seeing this wrong just thought I'd point that out since I'm a Comet Hunter Brother. Also I got my M54 to M48 from another manufacturer but it's short too Probably within margin of error. I also use a 183 not a 294 so vignetting is not a problem here but I wouldn't know about your sensor requirements. Have a good one! Clear Skies
AstroBeard Interesting! When I achieve focus I’ve found my focuser drawtube isn’t in the light path. It is with a DSLR but no the 6.5mm backfocus CMOS cameras. I use the 294MC pro because it has perfect sampling on the comet hunter and I use the 183MC Pro on the RASA 8 for the same reason. That’s a good way to attach your camera still! Thanks for stopping by. Clear skies!
Great job, but you do not mention a coma corrector with a fast newtonian, please elaborate.
The Schmidt Newton doesnt need that, because the meniscus lens in front of the scope is correcting this.
ZWO ships their cameras with several black nylon spacers of varying thicknesses. If you put one of these in the T-thread fittings it will allow you to snug up the camera at different rotations for framing.
Doctor Schulte True, but a pain to do while imaging since you have to find the one with the right thickness. Good idea though.