8472
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Not really, a hacksaw should do it and yes, you don't want to leave any burrs to lacerate your or any future owner's hands. Upon re-assembly, I covered any exposed metal with black self adhesive flocking material. Just be wary of how much of the drawtube you remove. Take too much off and the tube will come off the rollers in the focuser when you wind it fully out. Additionally, I shifted the primary up the OTA, so I wouldn't have to saw too much of the drawtube off. Good luck!
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No, you can completely remove the drawtube from the focuser, from your picture.
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I'd go with RVO over DFO any day of the week.
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Mount the OTA with the focuser at the 12 o'clock position. Although I don't use one, a dew shield may also help. I've also made a secondary dew heater.
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Fantastic shot.
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God, I'm stupid - of course it is! 🤦 Thanks!
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Long time 130P-DS owner here who's performed a few mods (part flocked, primary mirror moved up the tube, shortened drawtube for zero light path intrusion, etc etc). I'm not sure if this has been brought up before, but am I right in thinking the light gathering surface area of the primary mirror is roughly equivalent to an 80mm refractor (considering the central obstruction of the secondary is 47mm)? (130mm X pi) - (47 X pi) = 260.75mm² 260.75 / pi = 83mm Happy to be corrected and sorry if this has already been beaten to death and/or debunked.
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Imaging with the Samyang 135mm f2
8472 replied to Uranium235's topic in Getting Started With Imaging
Here's a newCepheus image of mine with my Samyang, QHY mono and HOO filter set. Just over 15.5h, lens wide open -
Of the 3, I'd go with the 294.
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Wonderful, thanks for those links.
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Thanks for that. I'd like to fit an EF adapter on the camera side of the FW, so If I'm not mistaken, i don't think there'd be enough back spacing distance to retain the standard circular dovetail. Also that thing looks prone to tilt issues to my eyes A quick look online at the bolt spacing of the FW and the camera minus dovetail seem to tell me they differ somewhat? Happy to be corrected.
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Has anybody with a QHY163M or QHY294M successfully paired it with the above filter wheel? What accessories are need? I know the medium fw is recommended, but I have 31mm filters. Asking here as neither UK or Hong Kong based retailers can be bothered to reply to my inquiries. Cheers
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Anyone have any recommendations as to what to cover the shiny silver drawtube with, as to potentially reduce internal reflections? I haven't flocked any if my OTA, nor have I shortened the draw tube in any way. Thanks.
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ASI 183MC pro, 533 MC pro or 294MC pro with a Z61
8472 replied to herne's topic in Getting Started Equipment Help and Advice
My pick would be either the 533 or 294. I've owned a Z61 for years and can tell you the 61mm aperture can no way resolve 1.37 arcseconds. Dawes limit is about 1.9, so the small pixels of the 183 are wasted. I also have a 294m, and it's a great match binned 2x2 (2.65 arcseconds/pixel). Unlocked it is way oversampled (similar pixel pitch as 183).