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Forum: Photographic Technique
04-09-2017, 01:29 PM
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Finally got stuff working for 30 second exposures. I need an intervalometer.
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Forum: Photographic Technique
03-21-2017, 01:44 PM
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Ohh, I got them in some of the pics (see Sirius), but what I was looking for is how to get them when focusing for use of a Bhatinov mask. Also, I am jealous of that pic.
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Forum: Photographic Technique
03-21-2017, 08:19 AM
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I will try those ISOs. I meant about the diffraction spikes for using a Bahtinov mask for focusing to make it easy mode. I will try the LV and zoom in method for focusing next. Also, any tips on exposure times to stop that overexposure in the core of the Orion nebula?
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Forum: Photographic Technique
03-21-2017, 07:42 AM
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If it is clear enough tonight I will give this a shot.
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Forum: Photographic Technique
03-21-2017, 07:09 AM
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I noticed smeary edges with the 1.4 tc. My big Bahtinov mask is great for my 150mm refractor, but too big for the lens I was using. I did order a 77 mm one today, so that's on the way. Any advice for turning up the gain enough to get diffraction spikes? The ones I got from Sirius were too small and I didn't use my prefocus cheat that I normally do because I was too late to do it in daylight, and the moon wasn't out so I missed the alternate way. I did join the AP group that I had no idea existed until last night.
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Forum: Photographic Technique
03-21-2017, 07:05 AM
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I do always do DNG to one card, jpeg to the other. DSS will choke on K1 files. .dng? Not going to happen, and the jpegs simply give an image with white lines, if it doesn't end up failing. I was shooting at ISO 3200 and 6400, which probably contributed to my problem.
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Forum: Photographic Technique
03-20-2017, 07:02 PM
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Okay, here's some of the stuff from last night, and it isn't all that good in quality, but I am sharing it anyway.. It tells me I needed to get the counterweight set right (duh, knew that) because the tripod was partially in the way (maybe a new, dedicated tripod too., causing things to be off balance and it to mess with tracking some, that I need a 77mm Bahtinov mask for focusing or to prefocus in the daytime and tape the focus ring down like I normally do, and that I really need my 150-450 to come back from being repaired again ASAP. So, last night's play with the new mount results are in and I need to work on my technique a little, but you get the Crab Nebula, parts of the Orion nebula complex (Flame Nebula, De Mairan's Nebula, Orion Nebula, Horsehead Nebula, part of Bernards Loop), Pleiades, M41, Sirius, and what I think is NGC 2360. Enjoy, and look for much better results in the future!
In case you're wondering the mount is an iOptron Skytracker Pro and the counterwweight kit is the iOptron 3311 (not the right one for the kit, but it can work with the right adapters, yeah, I was stupid in ordering it) and a generic ballhead from Amazon. I think once I get things set I can probably pull off 2+ minute exposures. The most I tried last night were 20 seconds, which when the camera was facing south ended up good, facing off axis, not so good at times due to the setup being a little off balance.
So, if anyone has advice in allowing the nebulosity to show, but minimizing clipping highlights I'd love to know. Also, how to keep the noise out, because these have fields of grain in them. Also, critique my technique because frankly these pics suck compared to some I see, and I want to get on their level, plus I can get a glimpse of what this setup is capable of when done right. All images taken with a K1, Tamron 70-200 f/2.8, and DA HD 1.4 Teleconverter. I really want
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