AS of NSW
AS of Hunter Valley
Fact: I like reflectors and big ones. All the refractors I own are either finderscopes, binoculars, or riflescopes.
18"/F4.5 Obsession #1333 fully optioned (OMI Optics)
14"/F4.5 SDM #33 fully optioned (Zambuto Optics)
10"/F5.3 SDM #50 fully optioned (Suchting Optics)
Pentax XW's, T4 & T5 Naglers , UO HD orthos, 6mm Delos, 8mm Radian, 8.5mm Pentax XF, 13mm Ethos. 12mm Celestron Illum Astrometric eyepiece. Rainbow Optics Spectroscopic Eyepiece Set. Orion Optics UK 250 lpi Ronchi grating eyepiece. 2" Astronomiks UHC, OIII & H-Beta filters, 2" DGM Optics NPB filter. 2" Variable Polariser. 2" Hoya colour filters.
Leupold 10x42 & Pentax 16x60 binos.
Orion XT8 Classic, Self built EQ platform
AstroTech 72ED, AstroTech 6 Imaging Newt
Celestron Advanced VX EQ Mount
Celestron NexStar SE 4/5 Mount (for grab and go)
Canon T3i, Canon XT (Hap Griffin Baader Mod)
QHY5L-II Mono/Orion 50MM Mini
Fort Bend Astronomy Club
Quote:1) What would be a good webcam to purchase and is that the best way for me to go?2) What sort of adaptor do I need to fit it to the Telescope?3) Am I correct in assuming that I will need a laptop, or similar, at the telescope to run the software which controls the webcam?4) My Pentax XW eyepieces have a removable eye guard and are threaded underneath this with a thread designed to accept a camera adaptor, which I have to fit the Canon 400D. Is there any sort of adaptor which will enable me to use eyepiece projection with a webcam and is there any advantage/disadvantage of this?5) What is the best way to focus the target and center it on the chip?6) Anything else I should consider purchasing, or need to know to get started.
Orlando, Florida, 81° W, 28.5° N, Joined: 8/27/11
CGEM, C8, C11, AT72ED, NexStar 5SE
Orion Starshoot Pro V2 Color, NexImage 5 / ASI120MC Planetary imagers
My photos: http://astrobin.com/users/Steve/
Quote:I can't find a lot of supporters here for the Orion SSCI IV, especially at an accompanying site. Is there more support for the NexImage 5 which is twice the price? I want to use in a 12.5" Dob f/4 with Paracorr at f/4.5.i have a motorized tracking table. The problem I see is getting it focused while keeping this small image centered in eyepiece. I am not sure it would work on a Dob. That is the goal. The ZWO is nearly double priced again. Does it provide double performance, or just fail the same failings? It says it can be used as a guide scope too. Is this true?
Paul B. Jones http://www.astrobin.com/users/bunyon/
C11 Edge HD, C925 XLT TEC 140 (#352) w/ AT65EDQ Skywatcher 100ED w/ WO66SD ZenithStar, ES 80mm Apo Sirius, Atlas EQ-G, "Atlosmandy" Pro AZ/EQ-G, T-Rex Apex,Porta II DBK21AU04, DBK21AU618, DMK21AU618, DMK31AU03, ASI120mm/mc, Hutech 500DH Beaglehaven Observatory (BYO #168)
Quote:Does the ASI120MC require modification (removing lens and adding 1.25" barrel)? Or does it come as is?
Black Creek Observatory C11 EdgeHD C8 AT6RC Eon80mmED
Quote:I am seriously considering the $200 Neximage 5 over the $100 SSCI IV. Does using a flip mirror diagonal help focusing here in a Newtonian? I could put a 1.25" wide angle eyepiece (Vixen 22mm) in my 12.4" dob and still have the webcam attached through the flip mirror. I probably would have to machine off some of the flip mirror tube to gain some back-focus. Does this work with these webcams or just cause vineting or other imaging problems? Is there some other problem I am not considering?
Quote:Does the ASI120MC really attract dust particles to the chip as others have mentioned and does the camera now come with a protective cover beneath the M42 lens cover? Is is cover an option that must be ordered separately, like the IR filter is?
Quote:Quote:I am seriously considering the $200 Neximage 5 over the $100 SSCI IV. Does using a flip mirror diagonal help focusing here in a Newtonian? I could put a 1.25" wide angle eyepiece (Vixen 22mm) in my 12.4" dob and still have the webcam attached through the flip mirror. I probably would have to machine off some of the flip mirror tube to gain some back-focus. Does this work with these webcams or just cause vineting or other imaging problems? Is there some other problem I am not considering? Focusing is always critical in astrophotography. You can get perfect focus (on planets) most of the time just by looking at the computer screen. If you want to get perfect focus all the time you need the Bahtinov mask.I don't think you need to worry about vignetting for planetary imaging. The chips are very tiny.One of the hardest parts is placing the planet in the small field of view. I am in the process of getting a more expensive finderscope to try to solve this problem. A flip mirror may not help for focusing but it would probably help for finding the planet.With a Bahtinov mask you focus on a star and then you have to find the planet with the tiny field of view that you get with the camera. With the flip mirror you would be able to center the planet in the eyepiece and then flip the mirror to the camera which was previously focused on a star.I have not seen a flip mirror but I assume that when you flip the mirror it locks into place exactly where it was before, no closer and no farther away from the mirror stops.There are three good choices:$100 SSCI IV$200 NexImage 5$300 ASI120MCIf you plot quality versus cost you will see a bend in the line, I suspect. You get a bigger improvement when going from $100 to $200 than you get from going from $200 to $300. You have to keep adding $100 until the extra improvement doesn't seem to be worth $100.I originally had the SSCI IV but didn't use it much because I was spending my time on DSI. When the NexImage 5 came out I got that and then sold the SSCI IV before I had a chance to see what all it could do. Now I am considering getting the ASI120MC. There is a more expensive option, the $450 Imaging Source camera but from what I've seen it is not any better than the $300 camera.
Quote:Focusing is always critical in astrophotography. You can get perfect focus (on planets) most of the time just by looking at the computer screen. If you want to get perfect focus all the time you need the Bahtinov mask.There are three good choices:$100 SSCI IV$200 NexImage 5$300 ASI120MCIf you plot quality versus cost you will see a bend in the line, I suspect. You get a bigger improvement when going from $100 to $200 than you get from going from $200 to $300. You have to keep adding $100 until the extra improvement doesn't seem to be worth $100.
"Normal" people worry me! - If you want to think "outside the square" you really need to get out of your box! A kleptomaniacal plethora of gear: Custom-cooled (my designs) C11&14, Orion Optics (UK) VX16 16" F4 newt waiting for obs, ED127 triplet, NEQ6Pro, HEQ5Pro, ancient AstroOptics EQ mount super-customised with microsteppers, goto etc, ASI120MM, ASI120MC, Flea3 (retired - accepting offers!) Toucam 840k, modded Canon 50d + F4L etc,etc & lots of other homebrew equipment.....
Quote:Mr. BK Brown is a good salesman. I ordered the ASI120MC tonight after his comments. However, I think you are both wrong about the free protective cover/dust shield for the chip. Only the postage is free. The covers cost $20. IR-cut for color and clear for mono. I bought it anyway with the camera at AliExpress. What do I do about imaging capture and processing software? Rely on the ZWO software download or cd? Or, is there something I should be using ( I immediately think MaximDL again).
Quote:There's some good feedback there Steve, but I have to disagree with you on one major point: there is an enormous difference in quality between what the ASI120mm/mc will produce and what the NextImage 5 will give you. The Celestron offering is not in the same league as the ZWO cams with their superior electronics, outrageous 100+ fps frame rates, and all-around performance; and the Orion StarShoot cameras are even further behind the power curve (that's where I started, and I jumped off that ship very quickly). I guess those "starter" cameras are a cheaper way to get into the game if your primary consideration is to get the least expensive camera you possibly can to get under way, but it doesn't take long to discover their considerable limitations. If you have to use a lap top already, it is well worth the extra cost to step up to the ASI120 cams. Just cruise the forum here and see how many high quality images are being taken by guys with these ZWO cameras compared to those taken with the Celestron/Orion imagers...Clear Skies,Brian
Quote:Steve, Darryl is dead on about the Bahtinov mask - I can''t think of any planetary imager I know who uses one. If the seeing is so bad that you can't draw focus on your target, it's probably a good night to go catch up on your reading. Clear Skies,Brian
"Violence is not the answer. Poison is the answer."
32.2N 110.9W (Elev 2582 ft)
Quote:I have a 2" 1.6X Antares barlow that I was hoping to try out also with this camera. Obviously physically connecting it isn't a problem by using a 2"/1.25" adaptor in the barlow and then inserting the M42-1.25" nosepiece into the adaptor. However all my Newtonians are optimised for visual use with 2 speed Feathertouch focusers and short focuser travel. Using the 2"/1.25" adaptor I am not sure I will have sufficient focuser in-travel to hit the chip. I actually have slight concerns that I will be able to "hit the chip" in any configuration. Is a M42-2" nosepiece available from ZW Optical, or elsewhere, that might allow me to use the 2" barlow?