bonellot

Hi I have a Meade 5000, 127mm refractor and just purchased a Scientific Explorer 0.7 focal reducer ""developed for the ED127 and 152 mm APO refractors. I also purchase an additional 3" to 2" adapter to fit the focal reducer directly into the main focuser. The other end connects directly to my canon 750d. My issue is not being able to achieve focus and I believe I'm about 10 or 15mm too far away from the main objective lens!. Has anyone had this issue and can it be overcome i.e. an additional adapter to extend the distance between the camera and first piece of glass?

Hi everyone, I'm finally using an off axes guider and I managed to achieve rounded stars on a 1 hour exposer 1 hour trial.tif

m82 30 minute lum trial.tif

I stripped my set up and very happy with the result. This is a 30 minute luminance sub taken tonight with no star trails. Thanks for your advice and advice always welcome Target 3_1800sec_1x1_m82 trial_frame1.fit

Thanks, I'm going to take your advice and loose the middle scope.

Hi, I use the 80mm scope in the middle for general observing or planetary imaging, as once I achieve the correct deep sky imaging setup then there's no way I'm gonna remove it lol, but I do see were your coming from. I followed a couple of videos on the net using this type of setup on a losmandy G11 mount that should easily take the load, although I'm still in the process of trying to achieve exactly what I need and running well.

Thanks everyone, I'm going to try to remove as much dust as I can from the qsi, filters and main lens and probably go back to my flattener. I think the ghosting might be coming from the extra filter wheel? so I might stick to only doing lrgb and ha imaging as this will tighten up possibilities of something going wrong

Thanks for your reply's, I am manually focussing and no I didnt re-focus for each filter and will try that. I use the QHY polar alignment camera and it was precise, but I will run through it again to make sure. here are a couple of images through the flattener:pre-processed cresent nebula 0lll.tif Cresent Nebula Ha Pre-Processed.tif

Hi, I've just purchased a Takahashi Focal reducer / flattener, but the stars in Ha are bloated, but not in LRGB? I have checked the spacing between the QSI and the Focal Reducer that screws directly in to the 3.5" focuser. I also have perfect stars when focusing with the bahnataov mask. I never had this issue when using a Takahashi flattener, am I missing something??? would really appreciate some help. The only thing I can think of is that my 2" narrowband filters are in a separate filter wheel connected to my QSI camera that has an integrated filter wheel, although this was never an issue when using my old flattener!!! M82 pre processed luminance.tif M82 pre processd ha.tif M82 pre processed red.tif M82 pre processed blue.tif M82 pre processed green.tif