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Pages: 1 | 2 | (show all) Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ One ASI impression       #5658969 - 02/02/13 09:39 PM Edit   Reply   Quote Quick Reply   Hi all, I'm having a great time learning how I want to use my new ASI camera. However I'm having one little issue that I'm not sure how to deal with. It is NOT a complaint, not in any way, but I've noticed this and hopefully someone can help me. This camera attracts dust motes for me like no other planetary cam I've owned. I'll be focusing and see them show up on the screen. Maybe they won't show up when I process I haven't tried that yet. I use a squeeze blower to try to remove the dust and while it helps, they just keep showing up. Q-tips and camel hair brushes just moves them around. It makes me wonder if the cmos chips generate small amounts of static. I do live in a very dry, somewhat dusty environment which probably contributes to the issue. Like I said, it's not a complaint, just an observation. Paul Post Extras:       Rankinstudio Carpal Tunnel Reged: 04/05/08 Loc: Southern UT Re: One ASI impression [Re: Sunspot]       #5658980 - 02/02/13 09:54 PM Edit   Reply   Quote Quick Reply   Paul, I noticed that as well. I wonder if the smaller pixel size is causing the little ones to show up more? I have to spend a while cleaning mine before each session. My little rocket air deal and some lint free wipes do the trick. Post Extras:       Kokatha man Post Laureate Reged: 09/13/09 Loc: "cooker-ta man" downunda... Re: One ASI impression [Re: Rankinstudio]       #5659036 - 02/02/13 10:31 PM Edit   Reply   Quote Quick Reply   .....join the club fellas..! It's dry & dusty "down here" also.....using 800X640 @ 50fps on Saturn has reduced the amount of cleaning time I need to attend to - the big screen with (relatively small) Saturn means I can usually keep away from 'em....! Post Extras:       wenjha Vendor Reged: 09/24/08 Loc: SuZhou China Re: One ASI impression [Re: Kokatha man]       #5659308 - 02/03/13 02:37 AM Edit   Reply   Quote Quick Reply   Yes Its very easy become dirty. I found it useful when use the IR-CUT filter screw to the camera body.not the 1.25" T2 adapter. but I usually swich between all sky camera and plantery camera.so no good choose for me Post Extras:       Chris_H Post Laureate Reged: 11/24/03 Loc: Norway Re: One ASI impression [Re: wenjha]       #5659905 - 02/03/13 12:33 PM Edit   Reply   Quote Quick Reply   Hell yes! I've never seen so much dirt before! I never had any problem with the DMK but the ASI seems to just attract dust! I must have spent an hour on it with swabs, lens pens and so on but nah - always some left... Any tips Sam? Post Extras:       RedLionNJ professor emeritus Reged: 12/29/09 Loc: Red Lion, NJ, USA Re: One ASI impression [Re: Chris_H]       #5660156 - 02/03/13 03:00 PM Edit   Reply   Quote Quick Reply   Ditto on the ASI. When I received my DMK, I thought it had an unusual propensity for attracting dust motes. But one really good cleaning-out of the housing seemed to cure that. And from then on, I always cap it when not in use AND store it in a freezer-quality Ziploc bag. Then came the ASI120. It probably had TWICE as many initial flecks of dust on the sensor cover as the DMK came with. The blowing-out of the enclosure and repeated application of isopropyl alcohol with a Q-tip seemed to work for a bit, but then I discovered the internal threading of the 1.25" adapter was shedding and magically being attracted to the sensor cover. So I thoroughly cleaned the adapter and now follow the same process as for storing my DMK - put a 1.25" cap over the filter end of the adapter when not in use, and store in a Ziploc bag. So far, so good, but I've only had the ASI for about a month (with no good seeing, naturally). Grant Post Extras:       Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ Re: One ASI impression [Re: RedLionNJ]       #5660224 - 02/03/13 03:44 PM Edit   Reply   Quote Quick Reply   Wow! At least it wasn't my imagination. I never thought about the adapter. Thanks for that heads up. Paul Post Extras:       Freddy WILLEMS Postmaster Reged: 11/13/05 Loc: Hawaii, Honolulu Re: One ASI impression [Re: Sunspot]       #5660238 - 02/03/13 03:52 PM Edit   Reply   Quote Quick Reply   Thanks for the update on that camera, Does a clear filter might work also ? Post Extras:       Chris_H Post Laureate Reged: 11/24/03 Loc: Norway Re: One ASI impression [Re: Freddy WILLEMS]       #5660248 - 02/03/13 03:55 PM Edit   Reply   Quote Quick Reply   I never though about the threading. Will look into that! Post Extras:       Kokatha man Post Laureate Reged: 09/13/09 Loc: "cooker-ta man" downunda... Re: One ASI impression [Re: Chris_H]       #5660330 - 02/03/13 04:49 PM Edit   Reply   Quote Quick Reply   .....I should respond to my somewhat flippant first reply here: if you settle on a specific optical train/setup then the problem virtually disappears - my Mk3 setup for variable image scales is clamped into my EFW and I take this whole unit off (camera, adapter & EFW) and cap the scope end of the EFW when stowing this in a ziplock bag in a plastic container to eliminate this problem.....the soon finished Mk4 will be slimmer & lighter and be stored the same way - neither version needs to see the camera being exposed to the air/dust again and gives image amplification from 1.2X to about 3X.....more than one would need for this small-pixelled camera! Post Extras:       RedLionNJ professor emeritus Reged: 12/29/09 Loc: Red Lion, NJ, USA Re: One ASI impression [Re: Kokatha man]       #5660686 - 02/03/13 08:42 PM Edit   Reply   Quote Quick Reply   Agreed totally, Darryl. If you don't shake the camera about or expose the open end, you'll likely be fine. Unfortunately for me, it's not the only piece of equipment I hang off my main scope at times. When the seeing is too poor for planetary, I can sometimes get away with some DSLR photography instead... Grant Post Extras:       wenjha Vendor Reged: 09/24/08 Loc: SuZhou China Re: One ASI impression [Re: RedLionNJ]       #5660719 - 02/03/13 08:53 PM Edit   Reply   Quote Quick Reply   I think the best way is the attach a clear filter to the camera body after clear it. And we are improving our assemble line to make the sensor as clear as possible. thank your guys feedback Post Extras:       Gupise member Reged: 01/04/13 Loc: Reggio Emilia, italy Re: One ASI impression [Re: wenjha]       #5661088 - 02/04/13 02:41 AM Edit   Reply   Quote Quick Reply   i noticed the same, for planet imaging is not a big problem (with roi), but if you want to shoot moon or sun it's hard to have a perfecty clean sensor. Post Extras:       dobsoscope sage Reged: 05/24/06 Re: One ASI impression [Re: Gupise]       #5661106 - 02/04/13 03:44 AM Edit   Reply   Quote Quick Reply   Maybe you can point out the best way to carry out cleaning without causing damage? Post Extras:       Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ Re: One ASI impression [Re: wenjha]       #5662550 - 02/04/13 09:49 PM Edit   Reply   Quote Quick Reply   I was thinking if a clear piece of flat optical glass was installed in the recessed area above the sensor, that might help. It would be similar to the Flea3. It would be much easier to keep clean and because it's away from the focal plane maybe the motes won't show up so dramatically. Thinking out loud... Paul Post Extras:       JMW scholastic sledgehammer Reged: 02/11/07 Loc: Nevada Re: One ASI impression [Re: Sunspot]       #5662701 - 02/04/13 11:34 PM Edit   Reply   Quote Quick Reply   Had my ASI120MC out for a test ride tonight. Horrible seeing and transparency and eventually cloud cover. I was using it on a C11 EdgeHD at 2800 mm. I had active cooling on the scope so the problem appears to be the sky not the scope. I was happy to get a pretty good focus in the conditions but I will wait for a better seeing forecast before I try again. Didn't notice any dust. Are there any good links to getting starting tutorials for hints on focusing, capturing and processing with a planetary cam? Post Extras:       Eduardo PS newbie Reged: 10/13/12 Loc: São Paulo, Brazil Re: One ASI impression [Re: JMW]       #5730216 - 03/13/13 12:15 PM Edit   Reply   Quote Quick Reply   Hi guys, first of all sorry about my english. about some dust on the ASI120MC it's seeing like that https://www.youtube.com/watch?v=0h0HGQSTaXg this video was taken on 03/12/13 in my house, I thought that was my IR filter but when i put the ASI in front off my lcd panel without any filter the dust appears too. Edited by Eduardo PS (03/13/13 12:43 PM) Post Extras:       PiotrM Carpal Tunnel Reged: 01/03/10 Loc: Poland Re: One ASI impression [Re: Eduardo PS]       #5730347 - 03/13/13 01:18 PM Edit   Reply   Quote Quick Reply   Blowgun is handy to clean the cover glass. Also cleaning with Baader Optical Wonder (or alike) may be handy/needed too. Post Extras:       joelimite Carpal Tunnel Reged: 09/01/08 Loc: Fayetteville, AR Re: One ASI impression [Re: PiotrM]       #5803737 - 04/16/13 11:44 PM Edit   Reply   Quote Quick Reply   I'm having the same issue with my new ASI 120MC. Great camera, but it's a dust magnet! Any more tips on cleaning the sensor? I've tried q-tips and 91-percent rubbing alcohol, a bulb blower, and a microfiber cleaning cloth, but I can't seem to get it entirely clean. No matter what I do, a few stubborn dust motes still appear on screen, especially when imaging the moon. Post Extras:       Bird Post Laureate Reged: 08/07/03 Loc: Murrumbateman, Australia Re: One ASI impression [Re: joelimite]       #5807654 - 04/18/13 08:36 PM Edit   Reply   Quote Quick Reply   My ASI camera sensor was covered in dust and spots when I received it, doesn't look like it had been handled in any sort of clean room. But after a few passes of cleaning I got rid of the most noticeable dust (a few faint ones are still there, I can see them on the flat-field if I stretch it up). The smaller pixel size should reduce the visiblility of the dust motes, simply because you will be using a lower focal ratio, and so the depth of field is smaller. The dust will still be there, but more out of focus compared with large focal ratios used on cameras with bigger pixels. eg on my flea3 I use f/24-ish, and on the ASI I use f/16-ish. Depth of field is quite a bit less at f/16 and so dust on the sensor is more out of focus at the image plane. cheers, Bird Post Extras:       Pages: 1 | 2 | (show all)

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