Leeps

Thanks for the hints Geoff! In your setup, I don't think it'd be possible to use this 2" filter, the same as mine - that's whats a little confusing to me. Does your 2" adapter unscrew to reveal a thread, between the dovetail end and the barrel?

For anyone that might find this thread, this post here is enlightening: https://agenaastro.com/articles/guides/miscellaneous/astronomy-threads-explained.html It seems my T-thread is a M42 x 0.75, and the "2 inch" thread is M48 x 0.75. I think I can buy adaptors / extension tubes around this info.

I'm trying to put together a modest rig with a D5100 that I've modded and my 200p newt scope. When I removed my hot mirror, I bought an external 2" ZWO astro replacement, expecting to be able to mount this in the scope and use the T ring adaptor in as normal. I'm a little frustrated tonight having finally received the thing, and it's not fitting on the T-threads (obviously that's not standard 2"...) Is there an adaptor I need? Is there a specific name for the 2" thread? It fits my 2" skywatcher eyepiece (that I also need an extension tube for, but don't know how to describe the thread!) To complicate things I also have another extension tube that came with my Nikon-T adapter that seems to be larger than 1.25" but doesn't match up with anything else! There's also the 2" holder on the scope which is another thread altogether 🙃 From the below picture: I would like the filter in between A and B (or C), and the only thing it fits to is D (which I need an extension tube to focus with!) I'm guessing I need an embiggener from A to filter, and then an ensmallener back to B again 🙃 Thanks for any help, I'm lost!

Ah okay. I'm a beginner at this, and I've been shooting with my D3300 till now, got this camera just for astro so I was a bit dismayed at the sheer amount of these pixels jumping out at me - I thought I had broken the camera with the firmware hack! If this is actually pretty typical then I will go ahead and do the mod and get shooting. I struggle to find time in the evenings as I have a young baby, so I want my gear all ready to go when I go to shoot - I haven't got any proper light frames from the camera yet. If I can rely on the calibration frames, I will go for the true dark current mod, get the frames straight off the sensor in uncompressed RAW, and see how much better it is than my D3300!

Hey all, I want to mod a D5100 to remove the IR/UV filter (and substitute a ZWO 2" astro one). One thing I've read about though, is the "star eater" filter that these cameras have. I managed to do the patch to remove this, but whenever I do, I get horrendous hot pixels, all over the frame. I've not seen anyone else reporting this... what am I doing wrong? If I put the old firmware back the issue goes away, but I won't want to get modding this thing if it's not going to be good for the job... I've actually done this with 2 cameras (Don't ask xD) and it's the same result with both... Is the patch just bad? Attached is the frame - when I apply star eater removal I get this. If I do the "True dark current" mod, I get the same but with a magenta hue. Anyone else using a 5100?